def objective(hyperparams):
tauRise = hyperparams['tauRise']
tauFall = hyperparams['tauFall']
dt = hyperparams['dt']
dtSample = hyperparams['dtSample']
f = DoubleExp(tauRise, tauFall)
spikes = np.load('data/%s_spikes.npz' % hyperparams['name'])['spikes']
targets = np.load('data/%s_target.npz' % hyperparams['name'])['target']
A = np.zeros((0, spikes.shape[2]))
Y = np.zeros((0, targets.shape[2]))
for n in range(hyperparams['nTrain']):
A = np.append(A, f.filt(spikes[n], dt=dt), axis=0)
Y = np.append(Y, targets[n], axis=0)
if dt != dtSample:
A = A[::int(dtSample / dt)]
Y = Y[::int(dtSample / dt)]
d, _ = LstsqL2(reg=hyperparams['reg'])(A, Y)
X = np.dot(A, d)
loss = rmse(X, Y)
loss += penalty * (10 * tauRise + tauFall)
return {
'loss': loss,
'd': d,
'tauRise': tauRise,
'tauFall': tauFall,
'status': STATUS_OK
}
def decode(spikes,
targets,
nTrain,
dt=0.001,
dtSample=0.001,
reg=1e-3,
penalty=0,
evals=100,
name="default",
tauRiseMax=3e-2,
tauFallMax=3e-1):
d, tauRise, tauFall = dfOpt(spikes,
targets,
nTrain,
name=name,
evals=evals,
reg=reg,
penalty=penalty,
dt=dt,
dtSample=dtSample,
tauRiseMax=tauRiseMax,
tauFallMax=tauFallMax)
print("tauRise: %.3f, tauFall: %.3f" % (tauRise, tauFall))
f = DoubleExp(tauRise, tauFall)
A = np.zeros((0, spikes.shape[2]))
Y = np.zeros((0, targets.shape[2]))
for n in range(nTrain):
A = np.append(A, f.filt(spikes[n], dt=dt), axis=0)
Y = np.append(Y, targets[n], axis=0)
X = np.dot(A, d)
error = rmse(X, Y)
d = d.reshape((-1, targets.shape[2]))
return d, f, tauRise, tauFall, X, Y, error
def df_opt_hx(x, ens, name='default', df_evals=100, seed=0, dt=0.001, dt_sample=0.001,
tau_rise=1e-3, tau_fall=[3e-2, 3e-1], penalty=0.25, algo=tpe.suggest): # rand.suggest):#
np.savez_compressed('data/%s_ens.npz'%name, ens=ens)
np.savez_compressed('data/%s_x.npz'%name, x=x)
del(ens)
del(x)
hyperparams = {}
hyperparams['name'] = name
hyperparams['dt'] = dt
hyperparams['dt_sample'] = dt_sample
hyperparams['tau_rise'] = tau_rise
# hyperparams['ens'] = hp.loguniform('ens', np.log10(tau_fall[0]), np.log10(tau_fall[1]))
# hyperparams['x'] = hp.loguniform('x', np.log10(tau_fall[0]), np.log10(tau_fall[1]))
hyperparams['ens'] = hp.uniform('ens', tau_fall[0], tau_fall[1])
hyperparams['x'] = hp.uniform('x', tau_fall[0], tau_fall[1])
def objective(hyperparams):
taus_ens = [hyperparams['tau_rise'], hyperparams['ens']]
taus_x = [hyperparams['tau_rise'], hyperparams['x']]
h_ens = DoubleExp(taus_ens[0], taus_ens[1])
h_x = DoubleExp(taus_x[0], taus_x[1])
A = h_ens.filt(np.load('data/%s_ens.npz'%hyperparams['name'])['ens'], dt=hyperparams['dt_sample'])
x = h_x.filt(np.load('data/%s_x.npz'%hyperparams['name'])['x'], dt=hyperparams['dt_sample'])
if dt != dt_sample:
A = A[::int(dt_sample/dt)]
x = x[::int(dt_sample/dt)]
d_ens = Lstsq()(A, x)[0]
xhat = np.dot(A, d_ens)
loss = rmse(xhat, x)
loss += penalty * taus_ens[1]
return {'loss': loss, 'taus_ens': taus_ens, 'taus_x': taus_x, 'd_ens': d_ens, 'status': STATUS_OK}
trials = Trials()
fmin(objective,
rstate=np.random.RandomState(seed=seed),
space=hyperparams,
algo=algo,
max_evals=df_evals,
trials=trials)
best_idx = np.argmin(trials.losses())
best = trials.trials[best_idx]
taus_ens = best['result']['taus_ens']
taus_x = best['result']['taus_x']
d_ens = best['result']['d_ens']
h_ens = DoubleExp(taus_ens[0], taus_ens[1])
h_x = DoubleExp(taus_x[0], taus_x[1])
return d_ens, h_ens, taus_ens, h_x, taus_x
def go(d_ens, f_ens, n_neurons=3000, t=100, L=False, neuron_type=LIF(),
m=Uniform(30, 40), i=Uniform(-1, 1), r=40, IC=np.array([1,1,1]),
seed=0, dt=0.001, dt_sample=0.001, f=DoubleExp(1e-3, 1e-1)):
with nengo.Network(seed=seed) as model:
# Ensembles
u = nengo.Node(lambda t: IC*(t<=1.0))
x = nengo.Ensemble(1, 3, neuron_type=nengo.Direct())
ens = nengo.Ensemble(n_neurons, 3, max_rates=m, intercepts=i, neuron_type=neuron_type, seed=seed, radius=r)
dss = nengo.Node(DownsampleNode(size_in=n_neurons, size_out=n_neurons, dt=dt, dt_sample=dt_sample), size_in=n_neurons, size_out=n_neurons)
# Connections
nengo.Connection(u, x, synapse=None)
nengo.Connection(x, x, function=feedback, synapse=~s)
if L:
supv = nengo.Ensemble(n_neurons, 3, neuron_type=SpikingRectifiedLinear(), radius=r, seed=seed)
nengo.Connection(x, supv, synapse=None)
nengo.Connection(supv, ens, synapse=f, seed=seed)
else:
nengo.Connection(ens, ens, synapse=f_ens, solver=NoSolver(d_ens), seed=seed)
# Probes
nengo.Connection(ens.neurons, dss, synapse=None)
p_x = nengo.Probe(x, synapse=None, sample_every=dt_sample)
p_ens = nengo.Probe(dss, synapse=None, sample_every=dt_sample)
with nengo.Simulator(model, seed=seed, dt=dt) as sim:
sim.run(t)
return dict(
times=sim.trange(),
x=sim.data[p_x],
ens=sim.data[p_ens])
def objective(hyperparams):
taus_ens = [hyperparams['tau_rise'], hyperparams['tau_fall']]
h_ens = DoubleExp(taus_ens[0], taus_ens[1])
A = h_ens.filt(np.load('data/%s_ens.npz'%hyperparams['name'])['ens'], dt=hyperparams['dt'])
x = np.load('data/%s_x.npz'%hyperparams['name'])['x']
if dt != dt_sample:
A = A[::int(dt_sample/dt)]
x = x[::int(dt_sample/dt)]
if hyperparams['reg']:
d_ens = LstsqL2(reg=hyperparams['reg'])(A, x)[0]
else:
d_ens = Lstsq()(A, x)[0]
xhat = np.dot(A, d_ens)
loss = rmse(xhat, x)
loss += penalty * (10*taus_ens[0] + taus_ens[1])
return {'loss': loss, 'taus_ens': taus_ens, 'd_ens': d_ens, 'status': STATUS_OK}
def objective(hyperparams):
taus_ens = [hyperparams['tau_rise'], hyperparams['ens']]
taus_x = [hyperparams['tau_rise'], hyperparams['x']]
h_ens = DoubleExp(taus_ens[0], taus_ens[1])
h_x = DoubleExp(taus_x[0], taus_x[1])
A = h_ens.filt(np.load('data/%s_ens.npz'%hyperparams['name'])['ens'], dt=hyperparams['dt_sample'])
x = h_x.filt(np.load('data/%s_x.npz'%hyperparams['name'])['x'], dt=hyperparams['dt_sample'])
if dt != dt_sample:
A = A[::int(dt_sample/dt)]
x = x[::int(dt_sample/dt)]
d_ens = Lstsq()(A, x)[0]
xhat = np.dot(A, d_ens)
loss = rmse(xhat, x)
loss += penalty * taus_ens[1]
return {'loss': loss, 'taus_ens': taus_ens, 'taus_x': taus_x, 'd_ens': d_ens, 'status': STATUS_OK}
def go(t=10, m=Uniform(30, 30), i=Uniform(0, 0), seed=0, dt=0.001, f=DoubleExp(1e-3, 1e-1), fS=DoubleExp(1e-3, 1e-1), d1=None, f1=None, e1=None, l1=False, stim=lambda t: np.sin(t)):
if not f1: f1=f
with nengo.Network(seed=seed) as model:
# Stimulus and Nodes
inpt = nengo.Node(stim)
tar = nengo.Ensemble(1, 1, neuron_type=nengo.Direct())
pre = nengo.Ensemble(100, 1, max_rates=m, seed=seed, neuron_type=LIF())
lif = nengo.Ensemble(1, 1, max_rates=m, intercepts=i, encoders=Choice([[1]]), neuron_type=LIF(), seed=seed)
wilson = nengo.Ensemble(1, 1, max_rates=m, intercepts=i, encoders=Choice([[1]]), neuron_type=Wilson(), seed=seed)
bio = nengo.Ensemble(1, 1, max_rates=m, intercepts=i, encoders=Choice([[1]]), neuron_type=Bio("Pyramidal"), seed=seed)
nengo.Connection(inpt, pre, synapse=None, seed=seed)
cLif = nengo.Connection(pre, lif, synapse=f1, seed=seed, solver=NoSolver(d1))
cWilson = nengo.Connection(pre, wilson, synapse=f1, seed=seed, solver=NoSolver(d1))
cBio = nengo.Connection(pre, bio, synapse=f1, seed=seed, solver=NoSolver(d1))
pInpt = nengo.Probe(inpt, synapse=None)
pPre = nengo.Probe(pre.neurons, synapse=None)
pLif = nengo.Probe(lif.neurons, synapse=None)
pWilson = nengo.Probe(wilson.neurons, synapse=None)
pBio = nengo.Probe(bio.neurons, synapse=None)
if l1: learnEncoders(cBio, lif, fS, alpha=3e-7) # Encoder Learning (Bio)
with nengo.Simulator(model, seed=seed, dt=dt, progress_bar=False) as sim:
setWeights(cBio, d1, e1)
neuron.h.init()
sim.run(t, progress_bar=True)
reset_neuron(sim, model)
e1 = cBio.e if l1 else e1
return dict(
times=sim.trange(),
inpt=sim.data[pInpt],
pre=sim.data[pPre],
lif=sim.data[pLif],
wilson=sim.data[pWilson],
bio=sim.data[pBio],
e1=e1,
)
def go(NPre=100,
N=100,
t=10,
m=Uniform(30, 30),
i=Uniform(-0.8, 0.8),
neuron_type=LIF(),
seed=0,
dt=0.001,
fPre=None,
fEns=None,
fS=DoubleExp(2e-2, 2e-1),
dPreA=None,
dPreB=None,
dEns=None,
ePreA=None,
ePreB=None,
eBio=None,
stage=None,
alpha=1e-6,
eMax=1e0,
stimA=lambda t: np.sin(t),
stimB=lambda t: 0):
with nengo.Network(seed=seed) as model:
inptA = nengo.Node(stimA)
inptB = nengo.Node(stimB)
preInptA = nengo.Ensemble(NPre, 1, radius=3, max_rates=m, seed=seed)
preInptB = nengo.Ensemble(NPre, 1, max_rates=m, seed=seed)
ens = nengo.Ensemble(N,
1,
max_rates=m,
intercepts=i,
neuron_type=neuron_type,
seed=seed)
tarEns = nengo.Ensemble(N,
1,
max_rates=m,
intercepts=i,
neuron_type=nengo.LIF(),
seed=seed)
cpa = nengo.Connection(inptA, preInptA, synapse=None, seed=seed)
cpb = nengo.Connection(inptB, preInptB, synapse=None, seed=seed)
pInptA = nengo.Probe(inptA, synapse=None)
pInptB = nengo.Probe(inptB, synapse=None)
pPreInptA = nengo.Probe(preInptA.neurons, synapse=None)
pPreInptB = nengo.Probe(preInptB.neurons, synapse=None)
pEns = nengo.Probe(ens.neurons, synapse=None)
pTarEns = nengo.Probe(tarEns.neurons, synapse=None)
if stage == 1:
c0b = nengo.Connection(preInptB,
tarEns,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed + 1)
c1b = nengo.Connection(preInptB,
ens,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed + 1)
learnEncoders(c1b, tarEns, fS, alpha=alpha, eMax=eMax)
if stage == 2:
c0a = nengo.Connection(preInptA,
tarEns,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c0b = nengo.Connection(preInptB,
tarEns,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed + 1)
c1a = nengo.Connection(preInptA,
ens,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c1b = nengo.Connection(preInptB,
ens,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed + 1)
learnEncoders(c1a, tarEns, fS, alpha=alpha, eMax=eMax)
if stage == 3:
c1a = nengo.Connection(preInptA,
ens,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c1b = nengo.Connection(preInptB,
ens,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed + 1)
if stage == 4:
preInptC = nengo.Ensemble(NPre, 1, max_rates=m, seed=seed)
ens2 = nengo.Ensemble(N,
1,
max_rates=m,
intercepts=i,
neuron_type=neuron_type,
seed=seed)
ens3 = nengo.Ensemble(N,
1,
max_rates=m,
intercepts=i,
neuron_type=neuron_type,
seed=seed)
nengo.Connection(inptB, preInptC, synapse=fEns, seed=seed)
c1a = nengo.Connection(preInptA,
ens,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c2b = nengo.Connection(preInptB,
ens2,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed + 1)
c3 = nengo.Connection(ens2,
ens,
synapse=fEns,
solver=NoSolver(dEns),
seed=seed)
c4a = nengo.Connection(preInptA,
ens3,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c4b = nengo.Connection(preInptC,
ens3,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed)
learnEncoders(c3, ens3, fS, alpha=alpha / 10, eMax=eMax)
pTarEns = nengo.Probe(ens3.neurons, synapse=None)
if stage == 5:
c1a = nengo.Connection(preInptA,
ens,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c5 = nengo.Connection(ens,
ens,
synapse=fEns,
solver=NoSolver(dEns),
seed=seed)
with nengo.Simulator(model, seed=seed, dt=dt, progress_bar=False) as sim:
if isinstance(neuron_type, Bio):
if stage == 1:
setWeights(c1b, dPreB, ePreB)
if stage == 2:
setWeights(c1a, dPreA, ePreA)
setWeights(c1b, dPreB, ePreB)
if stage == 3:
setWeights(c1a, dPreA, ePreA)
setWeights(c1b, dPreB, ePreB)
if stage == 4:
setWeights(c1a, dPreA, ePreA)
setWeights(c2b, dPreB, ePreB)
setWeights(c4a, dPreA, ePreA)
setWeights(c4b, dPreB, ePreB)
setWeights(c3, dEns, eBio)
if stage == 5:
setWeights(c1a, dPreA, ePreA)
setWeights(c5, dEns, eBio)
neuron.h.init()
sim.run(t, progress_bar=True)
reset_neuron(sim, model)
else:
sim.run(t, progress_bar=True)
ePreB = c1b.e if stage == 1 else ePreB
ePreA = c1a.e if stage == 2 else ePreA
eBio = c3.e if stage == 4 else eBio
return dict(
times=sim.trange(),
inptA=sim.data[pInptA],
inptB=sim.data[pInptB],
preInptA=sim.data[pPreInptA],
preInptB=sim.data[pPreInptB],
ens=sim.data[pEns],
tarEns=sim.data[pTarEns],
ePreA=ePreA,
ePreB=ePreB,
eBio=eBio,
)
def run(NPre=100,
N=30,
t=10,
nTrain=5,
nEnc=5,
nTest=10,
dt=0.001,
neuron_type=LIF(),
fPre=DoubleExp(1e-3, 1e-1),
fS=DoubleExp(2e-2, 2e-1),
Tff=0.3,
reg=1e-1,
tauRiseMax=1e-1,
tauFallMax=3e-1,
load=[],
file="data/integrate"):
print('\nNeuron Type: %s' % neuron_type)
file = file + f"{neuron_type}.npz"
if 0 in load:
dPreA = np.load(file)['dPreA'] # fix indexing of decoders
dPreB = np.load(file)['dPreB']
else:
print('readout decoders for preInptA and preInptB')
spikesInptA = np.zeros((nTrain, int(t / 0.001), NPre))
spikesInptB = np.zeros((nTrain, int(t / 0.001), NPre))
targetsInptA = np.zeros((nTrain, int(t / 0.001), 1))
targetsInptB = np.zeros((nTrain, int(t / 0.001), 1))
for n in range(nTrain):
stimA, stimB = makeSignal(t, fPre, dt=0.001, seed=n)
data = go(NPre=NPre,
N=N,
t=t,
dt=0.001,
neuron_type=neuron_type,
fPre=fPre,
fS=fS,
stimA=stimA,
stimB=stimB)
spikesInptA[n] = data['preInptA']
spikesInptB[n] = data['preInptB']
targetsInptA[n] = fPre.filt(Tff * data['inptA'], dt=0.001)
targetsInptB[n] = fPre.filt(data['inptB'], dt=0.001)
dPreA, X1a, Y1a, error1a = decodeNoF(spikesInptA,
targetsInptA,
nTrain,
fPre,
dt=0.001,
reg=reg)
dPreB, X1b, Y1b, error1b = decodeNoF(spikesInptB,
targetsInptB,
nTrain,
fPre,
dt=0.001,
reg=reg)
np.savez(file, dPreA=dPreA, dPreB=dPreB)
times = np.arange(0, t * nTrain, 0.001)
plotState(times, X1a, Y1a, error1a, "integrate",
"%s_preInptA" % neuron_type, t * nTrain)
plotState(times, X1b, Y1b, error1b, "integrate",
"%s_preInptB" % neuron_type, t * nTrain)
if 1 in load:
ePreB = np.load(file)['ePreB']
elif isinstance(neuron_type, Bio):
print("encoders for preInptB-to-ens")
ePreB = np.zeros((NPre, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, dt=dt, seed=n)
data = go(dPreA=dPreA,
dPreB=dPreB,
ePreB=ePreB,
NPre=NPre,
N=N,
t=t,
dt=dt,
neuron_type=neuron_type,
fPre=fPre,
fS=fS,
stimA=stimA,
stimB=stimB,
stage=1)
ePreB = data['ePreB']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrate", "preIntgToEns")
np.savez(file, dPreA=dPreA, dPreB=dPreB, ePreB=ePreB)
else:
ePreB = np.zeros((NPre, N, 1))
if 2 in load:
ePreA = np.load(file)['ePreA']
elif isinstance(neuron_type, Bio):
print("encoders for preInptA-to-ens")
ePreA = np.zeros((NPre, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, dt=dt, seed=n)
data = go(dPreA=dPreA,
dPreB=dPreB,
ePreA=ePreA,
ePreB=ePreB,
fPre=fPre,
NPre=NPre,
N=N,
t=t,
dt=dt,
neuron_type=neuron_type,
fS=fS,
stimA=stimA,
stimB=stimB,
stage=2)
ePreA = data['ePreA']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrate", "preInptToEns")
np.savez(file, dPreA=dPreA, dPreB=dPreB, ePreA=ePreA, ePreB=ePreB)
else:
ePreA = np.zeros((NPre, N, 1))
if 3 in load:
dEns = np.load(file)['dEns']
tauRiseEns = np.load(file)['tauRiseEns']
tauFallEns = np.load(file)['tauFallEns']
fEns = DoubleExp(tauRiseEns, tauFallEns)
else:
print('readout decoders for ens')
spikes = np.zeros((nTrain, int(t / dt), N))
targets = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stimA, stimB = makeSignal(t, fPre, dt=dt, seed=n)
data = go(dPreA=dPreA,
dPreB=dPreB,
ePreA=ePreA,
ePreB=ePreB,
NPre=NPre,
N=N,
t=t,
dt=dt,
neuron_type=neuron_type,
fPre=fPre,
fS=fS,
stimA=stimA,
stimB=stimB,
stage=3)
spikes[n] = data['ens']
targets[n] = fPre.filt(data['inptB'], dt=dt)
dEns, fEns, tauRiseEns, tauFallEns, X2, Y2, error2 = decode(
spikes,
targets,
nTrain,
dt=dt,
reg=reg,
tauRiseMax=tauRiseMax,
tauFallMax=tauFallMax,
name="integrate")
np.savez(file,
dPreA=dPreA,
dPreB=dPreB,
ePreA=ePreA,
ePreB=ePreB,
dEns=dEns,
tauRiseEns=tauRiseEns,
tauFallEns=tauFallEns)
times = np.arange(0, t * nTrain, dt)
plotState(times, X2, Y2, error2, "integrate", "%s_ens" % neuron_type,
t * nTrain)
if 4 in load:
eBio = np.load(file)['eBio']
elif isinstance(neuron_type, Bio):
print("encoders from ens2 to ens")
eBio = np.zeros((N, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, dt=dt, seed=n)
data = go(dPreA=dPreA,
dPreB=dPreB,
dEns=dEns,
ePreA=ePreA,
ePreB=ePreB,
eBio=eBio,
NPre=NPre,
N=N,
t=t,
dt=dt,
neuron_type=neuron_type,
fPre=fPre,
fEns=fEns,
fS=fS,
stimA=stimA,
stimB=stimB,
stage=4)
eBio = data['eBio']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrate", "Ens2Ens")
np.savez(file,
dPreA=dPreA,
dPreB=dPreB,
ePreA=ePreA,
ePreB=ePreB,
dEns=dEns,
tauRiseEns=tauRiseEns,
tauFallEns=tauFallEns,
eBio=eBio)
else:
eBio = np.zeros((N, N, 1))
print("testing")
errors = np.zeros((nTest))
for test in range(nTest):
stimA, stimB = makeSignal(t, fPre, dt=dt, seed=200 + test)
data = go(dPreA=dPreA,
dEns=dEns,
ePreA=ePreA,
eBio=eBio,
NPre=NPre,
N=N,
t=t,
dt=dt,
neuron_type=neuron_type,
fPre=fPre,
fEns=fEns,
fS=fS,
stimA=stimA,
stimB=stimB,
stage=5)
A = fEns.filt(data['ens'], dt=dt)
X = np.dot(A, dEns)
Y = fPre.filt(data['inptB'], dt=dt)
U = fPre.filt(Tff * data['inptA'], dt=dt)
error = rmse(X, Y)
errorU = rmse(X, U)
errors[test] = error
fig, ax = plt.subplots()
# ax.plot(data['times'], U, label="input")
ax.plot(data['times'], X, label="estimate")
ax.plot(data['times'], Y, label="target")
ax.set(xlabel='time',
ylabel='state',
title='rmse=%.3f' % error,
xlim=((0, t)),
ylim=((-1, 1)))
ax.legend(loc='upper left')
sns.despine()
fig.savefig("plots/integrate_%s_test%s.pdf" % (neuron_type, test))
plt.close('all')
# print('errors:', errors)
# np.savez(file, errors=errors, dPreA=dPreA, dPreB=dPreB, ePreA=ePreA, ePreB=ePreB, dEns=dEns, tauRiseEns=tauRiseEns, tauFallEns=tauFallEns, eBio=eBio)
return data['times'], X, Y
def run(n_neurons=30, t=10, t_test=10, tDA=5, dt=0.001, n_encodes=10, n_tests=1, reg=0, f_NMDA=DoubleExp(1.06e-2, 2.85e-1), f_GABA=DoubleExp(5e-4, 1.5e-3), f_AMPA=DoubleExp(5.5e-4, 2.2e-3), f_s=DoubleExp(1e-2, 2e-1), load_w=None, load_fd=None, data_file="data/dale2.npz"):
# Stage 1
DA = lambda t: 0
if load_w:
ePExc = np.load(data_file)['ePExc']
wPExc = np.load(data_file)['wPExc']
eIExc = np.load(data_file)['eIExc']
wIExc = np.load(data_file)['wIExc']
ePInh = np.load(data_file)['ePInh']
wPInh = np.load(data_file)['wPInh']
eIInh = np.load(data_file)['eIInh']
wIInh = np.load(data_file)['wIInh']
else:
ePExc = None
eIExc = None
ePInh = None
eIInh = None
print('Optimizing pre-ens encoders')
for nenc in range(n_encodes):
print("encoding trial %s"%nenc)
s = make_signal(t=t, dt=dt, f=f_AMPA, seed=nenc)
stim = lambda t: s[int(t/dt)]
data = go(ePExc=ePExc, eIExc=eIExc, ePInh=ePInh, eIInh=eIInh,
f_NMDA=f_NMDA, f_AMPA=f_AMPA, f_GABA=f_GABA, f_s=f_s,
n_neurons=n_neurons, t=t, stim=stim, stage=1)
ePExc = data['ePExc']
wPExc = data['wPExc']
eIExc = data['eIExc']
wIExc = data['wIExc']
ePInh = data['ePInh']
wPInh = data['wPInh']
eIInh = data['eIInh']
wIInh = data['wIInh']
np.savez('data/dale2.npz', ePExc=ePExc, wPExc=wPExc, eIExc=eIExc, wIExc=wIExc, ePInh=ePInh, wPInh=wPInh, eIInh=eIInh, wIInh=wIInh)
aSupv = f_s.filt(data['supv'])
aP = f_s.filt(data['P'])
aI = f_s.filt(data['I'])
for n in range(n_neurons):
fig, ax = plt.subplots(1, 1)
ax.plot(data['times'], aSupv[:,n], alpha=0.5, label='supv')
ax.plot(data['times'], aP[:,n], alpha=0.5, label='P')
ax.plot(data['times'], aI[:,n], alpha=0.5, label='I')
ax.set(ylim=((0, 40)))
plt.legend()
plt.savefig('plots/tuning/dale_eFF_%s.pdf'%n)
plt.close('all')
# Stage 2
if load_fd:
dNMDA = np.load(data_file)['dNMDA']
dAMPA = np.load(data_file)['dAMPA']
dGABA = np.load(data_file)['dGABA']
else:
print("Optimizing decoders")
s = make_signal(t=t, dt=dt, f=f_AMPA, seed=0)
stim = lambda t: s[int(t/dt)]
data = go(
wPExc=wPExc, wIExc=wIExc, wPInh=wPInh, wIInh=wIInh,
f_NMDA=f_NMDA, f_AMPA=f_AMPA, f_GABA=f_GABA, f_s=f_s,
n_neurons=n_neurons, t=t, stim=stim, stage=2)
aNMDA = f_NMDA.filt(data['P'])
xFB = f_NMDA.filt(data['u'])
dNMDA, _ = nengo.solvers.LstsqL2(reg=1e-2)(aNMDA, xFB)
# positive w fron mixed dFB enforced by learning node in stage 3
aAMPA = f_AMPA.filt(data['P'])
aGABA = f_GABA.filt(data['I'])
xOut = data['u']
aOut = np.hstack((aAMPA, -aGABA))
dBoth, _ = nnls(aOut, np.ravel(xOut))
dAMPA = dBoth[:n_neurons].reshape((n_neurons, 1))
dGABA = -dBoth[n_neurons:].reshape((n_neurons, 1))
np.savez('data/dale2.npz', ePExc=ePExc, wPExc=wPExc, eIExc=eIExc, wIExc=wIExc, ePInh=ePInh, wPInh=wPInh, eIInh=eIInh, wIInh=wIInh, dNMDA=dNMDA, dAMPA=dAMPA, dGABA=dGABA)
xhatFB = np.dot(aNMDA, dNMDA)
xhatOut = np.dot(aAMPA, dAMPA) + np.dot(aGABA, dGABA)
xhatFB_rmse = rmse(np.ravel(xhatFB), np.ravel(xFB))
xhatOut_rmse = rmse(np.ravel(xhatOut), np.ravel(xOut))
fig, ax = plt.subplots()
ax.plot(data['times'], xFB, alpha=0.5, linestyle="--", label='xFB')
ax.plot(data['times'], xhatFB, label='xhatFB, rmse=%.3f' %xhatFB_rmse)
# ax.plot(data['times'], xOut, alpha=0.5, linestyle="--", label='xOut')
# ax.plot(data['times'], xhatOut, label='xhatOut, rmse=%.3f' %xhatOut_rmse)
ax.set(xlabel='time (s)', ylabel=r'$\mathbf{x}$', title="train decoders")
plt.legend(loc='upper right')
plt.savefig("plots/dale2_train_decoders.pdf")
# Stage 3
# dGABAFb = np.random.RandomState(seed=0).uniform(-1e-4, 0, size=(n_neurons, 1))
dGABAFb = -3e-4*np.ones((n_neurons, 1))
if load_w:
ePP = np.load(data_file)['ePP']
wPP = np.load(data_file)['wPP']
ePI = np.load(data_file)['ePI']
wPI = np.load(data_file)['wPI']
eIP = np.load(data_file)['eIP']
wIP = np.load(data_file)['wIP']
eII = np.load(data_file)['eII']
wII = np.load(data_file)['wII']
else:
print('Optimizing ePP, ePI, eIP, eII')
ePP = None
ePI = None
eIP = None
eII = None
DA = lambda t: 0 if t<tDA else 0.5
for nenc in range(n_encodes):
print("encoding trial %s"%nenc)
s = make_signal(t=t, dt=dt, f=f_NMDA, seed=nenc)
stim = lambda t: s[int(t/dt)]
data = go(
wPExc=wPExc, wIExc=wIExc, wPInh=wPInh, wIInh=wIInh,
ePP=ePP, ePI=ePI, eIP=eIP, eII=eII,
dNMDA=dNMDA, dAMPA=dAMPA, dGABA=dGABAFb,
f_NMDA=f_NMDA, f_AMPA=f_AMPA, f_GABA=f_GABA, f_s=f_s,
n_neurons=n_neurons, t=t, stim=stim, DA=DA, stage=3)
ePP = data['ePP']
wPP = data['wPP']
ePI = data['ePI']
wPI = data['wPI']
eIP = data['eIP']
wIP = data['wIP']
eII = data['eII']
wII = data['wII']
np.savez('data/dale2.npz', ePExc=ePExc, wPExc=wPExc, eIExc=eIExc, wIExc=wIExc, ePInh=ePInh, wPInh=wPInh, eIInh=eIInh, wIInh=wIInh, dNMDA=dNMDA, dAMPA=dAMPA, dGABA=dGABA, ePP=ePP, wPP=wPP, ePI=ePI, wPI=wPI, eIP=eIP, wIP=wIP, eII=eII, wII=wII)
aP = f_s.filt(data['P'])
aI = f_s.filt(data['I'])
aBuffer = f_s.filt(data['buffer'])
for n in range(n_neurons):
fig, (ax, ax2) = plt.subplots(nrows=1, ncols=2, sharey=True)
ax.plot(data['times'], aBuffer[:,n], alpha=0.5, label='buffer')
ax.plot(data['times'], aP[:,n], alpha=0.5, label='P')
ax2.plot(data['times'], aBuffer[:,n], alpha=0.5, label='buffer')
ax2.plot(data['times'], aI[:,n], alpha=0.5, label='I')
ax.set(ylim=((0, 40)))
ax.legend()
ax2.legend()
plt.savefig('plots/tuning/dale_eFB_%s.pdf'%n)
plt.close('all')
# confirm gated integrator (which generates targets) is working in state-space
fig, ax = plt.subplots()
ax.plot(data['times'], data['uDA'], label="DA")
ax.plot(data['times'], data['gate_x'], label="gate")
ax.plot(data['times'], data['buffer_x'], label="buffer")
ax.plot(data['times'], data['fdbk_x'], label="fdbk")
ax.legend()
fig.savefig("plots/dale2_train_gatedIntegrator.pdf")
# Stage 4
checkWeights(wPExc, wIExc, wPInh, wIInh, wPP, wPI, wIP, wII, dAMPA, dGABA)
DA = lambda t: 0 if t < tDA else 1.0
dGABAFb = np.random.RandomState(seed=0).uniform(-1e-4, 0, size=(n_neurons, 1))
for test in range(n_tests):
print("Test %s"%test)
s = make_signal(t=t, dt=dt, f=f_NMDA, seed=test)
stim = lambda t: s[int(t/dt)]
data = go(
wPExc=wPExc, wIExc=wIExc, wPInh=wPInh, wIInh=wIInh,
wPP=wPP, wPI=wPI, wIP=wIP, wII=wII,
dNMDA=dNMDA, dAMPA=dAMPA, dGABA=dGABAFb,
f_NMDA=f_NMDA, f_AMPA=f_AMPA, f_GABA=f_GABA, f_s=f_s,
n_neurons=n_neurons, t=t, stim=stim, DA=DA, stage=4)
aNMDA = f_NMDA.filt(data['P'])
aAMPA = f_AMPA.filt(data['P'])
aGABA = f_GABA.filt(data['I'])
u = data['u']
da = data['uDA']
gate = data['gate_x']
buffer = data['buffer_x']
fdbk = data['fdbk_x']
xhat = np.dot(aNMDA, dNMDA)
xhat_rmse = rmse(xhat, buffer)
fig, ax = plt.subplots()
ax.plot(data['times'], u, linestyle="--", label='u')
ax.plot(data['times'], da, linestyle="--", label='DA')
ax.plot(data['times'], gate, label="gate")
ax.plot(data['times'], buffer, label="buffer")
ax.plot(data['times'], fdbk, label="fdbk")
ax.plot(data['times'], xhat, label='xhat, rmse=%.3f' %xhat_rmse)
ax.set(xlabel='time (s)', ylabel=r'$\mathbf{x}$', title="test")
plt.legend(loc='upper right')
plt.savefig("plots/dale2_test_DA1_%s.pdf"%test)
def run(NPre=300,
NBias=100,
N=30,
t=10,
nTrain=10,
nTest=5,
nEnc=10,
dt=0.001,
fPre=DoubleExp(1e-3, 1e-1),
fNMDA=DoubleExp(10.6e-3, 285e-3),
fGABA=DoubleExp(0.5e-3, 1.5e-3),
fS=DoubleExp(2e-2, 1e-1),
DATrain=lambda t: 0,
DATest=lambda t: 0,
Tff=0.3,
reg=1e-2,
load=[],
file=None):
if 0 in load:
dPre = np.load(file)['dPre']
else:
print('readout decoders for [preA, preB, preC]')
spikesInpt = np.zeros((nTrain, int(t / dt), NPre))
targetsInpt = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(NPre=NPre,
NBias=NBias,
N=N,
t=t,
dt=dt,
DA=DATrain,
stimA=stimA,
stimB=stimB,
stage=0)
spikesInpt[n] = data['preA']
targetsInpt[n] = fPre.filt(data['inptA'], dt=dt)
dPre, X, Y, error = decodeNoF(spikesInpt,
targetsInpt,
nTrain,
fPre,
dt=dt,
reg=reg)
np.savez(
"data/integrateNMDAbias2.npz",
dPre=dPre,
)
times = np.arange(0, t * nTrain, dt)
plotState(times, X, Y, error, "integrateNMDAbias2", "pre", t * nTrain)
if 1 in load:
ePreFdfw = np.load(file)['ePreFdfw']
ePreBias = np.load(file)['ePreBias']
else:
print("encoders for [preA, preC] to [fdfw, bias]")
ePreFdfw = np.zeros((NPre, N, 1))
ePreBias = np.zeros((NPre, NBias, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(NPre=NPre,
NBias=NBias,
N=N,
t=t,
dt=dt,
DA=DATrain,
stimA=stimA,
stimB=stimB,
dPre=dPre,
ePreFdfw=ePreFdfw,
ePreBias=ePreBias,
stage=1)
ePreFdfw = data['ePreFdfw']
ePreBias = data['ePreBias']
plotActivity(t, dt, fS, data['times'], data['fdfw'],
data['tarFdfw'], "integrateNMDAbias2", "pre_fdfw")
plotActivity(t, dt, fS, data['times'], data['bias'],
data['tarBias'], "integrateNMDAbias2", "pre_bias")
np.savez("data/integrateNMDAbias2.npz",
dPre=dPre,
ePreFdfw=ePreFdfw,
ePreBias=ePreBias)
if 2 in load:
dFdfw = np.load(file)['dFdfw']
dBias = np.load(file)['dBias']
else:
print('readout decoders for fdfw and bias')
spikesFdfw = np.zeros((nTrain, int(t / dt), N))
spikesBias = np.zeros((nTrain, int(t / dt), NBias))
targetsFdfw = np.zeros((nTrain, int(t / dt), 1))
targetsBias = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stimA, _ = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(NPre=NPre,
NBias=NBias,
N=N,
t=t,
dt=dt,
DA=DATrain,
stimA=stimA,
dPre=dPre,
ePreFdfw=ePreFdfw,
ePreBias=ePreBias,
stage=2)
spikesFdfw[n] = data['fdfw']
spikesBias[n] = data['bias']
targetsFdfw[n] = fNMDA.filt(Tff * fPre.filt(data['inptA'], dt=dt))
targetsBias[n] = fGABA.filt(fPre.filt(data['inptC'], dt=dt))
dFdfw, X1, Y1, error1 = decodeNoF(spikesFdfw,
targetsFdfw,
nTrain,
fNMDA,
dt=dt,
reg=reg)
dBias, X2, Y2, error2 = decodeNoF(spikesBias,
targetsBias,
nTrain,
fGABA,
dt=dt,
reg=reg)
np.savez("data/integrateNMDAbias2.npz",
dPre=dPre,
ePreFdfw=ePreFdfw,
ePreBias=ePreBias,
dFdfw=dFdfw,
dBias=dBias)
times = np.arange(0, t * nTrain, dt)
plotState(times, X1, Y1, error1, "integrateNMDAbias2", "fdfw",
t * nTrain)
plotState(times, X2, Y2, error2, "integrateNMDAbias2", "bias",
t * nTrain)
if 3 in load:
eBiasEns = np.load(file)['eBiasEns']
else:
print("encoders for [bias] to ens")
eBiasEns = np.zeros((NBias, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(NPre=NPre,
NBias=NBias,
N=N,
t=t,
dt=dt,
DA=DATrain,
stimA=stimA,
dPre=dPre,
dBias=dBias,
ePreBias=ePreBias,
eBiasEns=eBiasEns,
stage=3)
eBiasEns = data['eBiasEns']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateNMDAbias2", "bias_ens")
np.savez(
"data/integrateNMDAbias2.npz",
dPre=dPre,
ePreFdfw=ePreFdfw,
ePreBias=ePreBias,
dFdfw=dFdfw,
dBias=dBias,
eBiasEns=eBiasEns,
)
if 4 in load:
ePreEns = np.load(file)['ePreEns']
else:
print("encoders for [preB] to [ens]")
ePreEns = np.zeros((NPre, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(NPre=NPre,
NBias=NBias,
N=N,
t=t,
dt=dt,
DA=DATrain,
stimA=stimA,
stimB=stimB,
dPre=dPre,
dBias=dBias,
ePreBias=ePreBias,
eBiasEns=eBiasEns,
ePreEns=ePreEns,
stage=4)
ePreEns = data['ePreEns']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateNMDAbias2", "pre_ens")
np.savez(
"data/integrateNMDAbias2.npz",
dPre=dPre,
ePreFdfw=ePreFdfw,
ePreBias=ePreBias,
dFdfw=dFdfw,
dBias=dBias,
eBiasEns=eBiasEns,
ePreEns=ePreEns,
)
if 5 in load:
eFdfwEns = np.load(file)['eFdfwEns']
else:
print("encoders for [fdfw] to ens")
eFdfwEns = np.zeros((N, N, 1))
for n in range(nEnc):
# stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
stimA, stimB = makeCarrier(t, fPre, fNMDA, dt=dt, seed=n)
data = go(NPre=NPre,
NBias=NBias,
N=N,
t=t,
dt=dt,
DA=DATrain,
stimA=stimA,
Tff=Tff,
dPre=dPre,
dFdfw=dFdfw,
dBias=dBias,
ePreFdfw=ePreFdfw,
ePreEns=ePreEns,
eFdfwEns=eFdfwEns,
eBiasEns=eBiasEns,
stage=5)
eFdfwEns = data['eFdfwEns']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateNMDAbias2", "fdfw_ens")
np.savez(
"data/integrateNMDAbias2.npz",
dPre=dPre,
ePreFdfw=ePreFdfw,
ePreEns=ePreEns,
ePreBias=ePreBias,
dFdfw=dFdfw,
dBias=dBias,
eFdfwEns=eFdfwEns,
eBiasEns=eBiasEns,
)
if 6 in load:
dEns = np.load(file)['dEns']
else:
print('readout decoders for ens')
spikes = np.zeros((nTrain, int(t / dt), N))
targets = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
# stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
stimA, stimB = makeCarrier(t, fPre, fNMDA, dt=dt, seed=n)
data = go(NPre=NPre,
NBias=NBias,
N=N,
t=t,
dt=dt,
DA=DATrain,
stimA=stimA,
stimB=stimB,
dPre=dPre,
dFdfw=dFdfw,
dBias=dBias,
ePreFdfw=ePreFdfw,
ePreEns=ePreEns,
eFdfwEns=eFdfwEns,
eBiasEns=eBiasEns,
stage=6)
spikes[n] = data['ens']
targets[n] = fNMDA.filt(fPre.filt(data['inptB']))
dEns, X, Y, error = decodeNoF(spikes,
targets,
nTrain,
fNMDA,
dt=dt,
reg=reg)
np.savez("data/integrateNMDAbias2.npz",
dPre=dPre,
ePreFdfw=ePreFdfw,
ePreEns=ePreEns,
ePreBias=ePreBias,
dFdfw=dFdfw,
dBias=dBias,
eFdfwEns=eFdfwEns,
eBiasEns=eBiasEns,
dEns=dEns)
times = np.arange(0, t * nTrain, dt)
plotState(times, X, Y, error, "integrateNMDAbias2", "ens", t * nTrain)
if 7 in load:
eEnsEns = np.load(file)['eEnsEns']
else:
print("encoders from ens to ens")
eEnsEns = np.zeros((N, N, 1))
for n in range(nEnc):
# stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
stimA, stimB = makeCarrier(t, fPre, fNMDA, dt=dt, seed=n)
data = go(NPre=NPre,
NBias=NBias,
N=N,
t=t,
dt=dt,
DA=DATrain,
stimA=stimA,
stimB=stimB,
dPre=dPre,
dFdfw=dFdfw,
dBias=dBias,
dEns=dEns,
ePreFdfw=ePreFdfw,
ePreEns=ePreEns,
eFdfwEns=eFdfwEns,
eBiasEns=eBiasEns,
eEnsEns=eEnsEns,
stage=7)
eEnsEns = data['eEnsEns']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateNMDAbias2", "ens_ens")
np.savez("data/integrateNMDAbias2.npz",
dPre=dPre,
ePreFdfw=ePreFdfw,
ePreEns=ePreEns,
ePreBias=ePreBias,
dFdfw=dFdfw,
dBias=dBias,
eFdfwEns=eFdfwEns,
eBiasEns=eBiasEns,
dEns=dEns,
eEnsEns=eEnsEns)
print("testing")
vals = np.linspace(-1, 1, nTest)
for test in range(nTest):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=200 + test)
data = go(NPre=NPre,
NBias=NBias,
N=N,
t=t,
dt=dt,
DA=DATest,
stimA=stimA,
stimB=stimB,
Tff=Tff,
dPre=dPre,
dFdfw=dFdfw,
dBias=dBias,
dEns=dEns,
ePreFdfw=ePreFdfw,
ePreEns=ePreEns,
eFdfwEns=eFdfwEns,
eBiasEns=eBiasEns,
eEnsEns=eEnsEns,
stage=8)
aFdfw = fNMDA.filt(data['fdfw'], dt=dt)
aBio = fNMDA.filt(data['ens'], dt=dt)
xhatFdfw = np.dot(aFdfw, dFdfw)
xhatEns = np.dot(aBio, dEns)
xFdfw = fNMDA.filt(fPre.filt(data['inptA'], dt=dt), dt=dt)
xEns = fNMDA.filt(fPre.filt(data['inptB'], dt=dt), dt=dt)
errorBio = rmse(xhatEns, xEns)
fig, ax = plt.subplots()
ax.plot(data['times'], xhatFdfw, alpha=0.5, label="fdfw")
ax.plot(data['times'], Tff * xFdfw, alpha=0.5, label="input")
ax.plot(data['times'], xEns, label="target")
ax.plot(data['times'],
xhatEns,
alpha=0.5,
label="ens, rmse=%.3f" % errorBio)
ax.set(xlabel='time',
ylabel='state',
xlim=((0, t)),
ylim=((-1.5, 1.5)))
ax.legend(loc='upper left')
sns.despine()
fig.savefig("plots/integrateNMDAbias2_testWhite%s.pdf" % test)
plt.close('all')
def run(NPre=200,
N=100,
N2=100,
t=10,
nTrain=10,
nEnc=20,
nTest=10,
neuron_type=LIF(),
dt=0.001,
f=DoubleExp(1e-3, 1e-1),
fS=DoubleExp(1e-3, 1e-1),
tauRiseMax=1e-2,
load=False,
file=None):
print('\nNeuron Type: %s' % neuron_type)
if load:
d1 = np.load(file)['d1']
tauRise1 = np.load(file)['tauRise1']
tauFall1 = np.load(file)['tauFall1']
f1 = DoubleExp(tauRise1, tauFall1)
else:
print('readout decoders for pre')
spikes = np.zeros((nTrain, int(t / 0.001), NPre))
targets = np.zeros((nTrain, int(t / 0.001), 2))
for n in range(nTrain):
stim = makeSignal(t, f, dt=0.001, seed=n)
data = go(NPre=NPre,
N=N,
N2=N2,
t=t,
dt=0.001,
f=f,
fS=fS,
neuron_type=LIF(),
stim=stim)
spikes[n] = data['pre']
targets[n] = f.filt(data['inpt'], dt=0.001)
d1, f1, tauRise1, tauFall1, X, Y, error = decode(spikes,
targets,
nTrain,
dt=0.001,
tauRiseMax=tauRiseMax,
name="multiplyNew")
np.savez("data/multiplyNew_%s.npz" % neuron_type,
d1=d1,
tauRise1=tauRise1,
tauFall1=tauFall1)
times = np.arange(0, t * nTrain, 0.001)
plotState(times, X, Y, error, "multiplyNew", "%s_pre" % neuron_type,
t * nTrain)
if load:
e1 = np.load(file)['e1']
elif isinstance(neuron_type, Bio):
print("ens1 encoders")
e1 = np.zeros((NPre, N, 2))
for n in range(nEnc):
stim = makeSignal(t, f, dt=dt, seed=n)
data = go(d1=d1,
e1=e1,
f1=f1,
NPre=NPre,
N=N,
N2=N2,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim,
l1=True)
e1 = data['e1']
np.savez("data/multiplyNew_%s.npz" % neuron_type,
d1=d1,
tauRise1=tauRise1,
tauFall1=tauFall1,
e1=e1)
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"multiplyNew", "ens")
else:
e1 = np.zeros((NPre, N, 2))
if load:
d2 = np.load(file)['d2']
tauRise2 = np.load(file)['tauRise2']
tauFall2 = np.load(file)['tauFall2']
f2 = DoubleExp(tauRise2, tauFall2)
else:
print('readout decoders for ens')
spikes = np.zeros((nTrain, int(t / dt), N))
targets = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stim = makeSignal(t, f, dt=dt, seed=n)
data = go(d1=d1,
e1=e1,
f1=f1,
NPre=NPre,
N=N,
N2=N2,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim)
spikes[n] = data['ens']
targets[n] = f.filt(data['tar'][:, 0] * data['tar'][:, 1],
dt=dt).reshape(-1, 1)
d2, f2, tauRise2, tauFall2, X, Y, error = decode(spikes,
targets,
nTrain,
dt=dt,
tauRiseMax=tauRiseMax,
name="multiplyNew")
np.savez("data/multiplyNew_%s.npz" % neuron_type,
d1=d1,
tauRise1=tauRise1,
tauFall1=tauFall1,
e1=e1,
d2=d2,
tauRise2=tauRise2,
tauFall2=tauFall2)
times = np.arange(0, t * nTrain, dt)
plotState(times, X, Y, error, "multiplyNew", "%s_ens" % neuron_type,
t * nTrain)
if load:
e2 = np.load(file)['e2']
elif isinstance(neuron_type, Bio):
print("ens2 encoders")
e2 = np.zeros((N, N2, 1))
for n in range(nEnc):
stim = makeSignal(t, f, dt=dt, seed=n)
data = go(d1=d1,
e1=e1,
f1=f1,
d2=d2,
e2=e2,
f2=f2,
NPre=NPre,
N=N,
N2=N2,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim,
l2=True)
e2 = data['e2']
np.savez("data/multiplyNew_%s.npz" % neuron_type,
d1=d1,
tauRise1=tauRise1,
tauFall1=tauFall1,
e1=e1,
d2=d2,
tauRise2=tauRise2,
tauFall2=tauFall2,
e2=e2)
plotActivity(t, dt, fS, data['times'], data['ens2'],
data['tarEns2'], "multiplyNew", "ens2")
else:
e2 = np.zeros((N, N2, 1))
if load:
d3 = np.load(file)['d3']
tauRise3 = np.load(file)['tauRise3']
tauFall3 = np.load(file)['tauFall3']
f3 = DoubleExp(tauRise3, tauFall3)
else:
print('readout decoders for ens2')
spikes = np.zeros((nTrain, int(t / dt), N2))
targets = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stim = makeSignal(t, f, dt=dt, seed=n)
data = go(d1=d1,
e1=e1,
f1=f1,
d2=d2,
e2=e2,
f2=f2,
NPre=NPre,
N=N,
N2=N2,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim)
spikes[n] = data['ens2']
targets[n] = f.filt(data['tar2'], dt=dt)
d3, f3, tauRise3, tauFall3, X, Y, error = decode(spikes,
targets,
nTrain,
dt=dt,
name="multiplyNew")
np.savez("data/multiplyNew_%s.npz" % neuron_type,
d1=d1,
tauRise1=tauRise1,
tauFall1=tauFall1,
e1=e1,
d2=d2,
tauRise2=tauRise2,
tauFall2=tauFall2,
e2=e2,
d3=d3,
tauRise3=tauRise3,
tauFall3=tauFall3)
times = np.arange(0, t * nTrain, dt)
plotState(times, X, Y, error, "multiplyNew", "%s_ens2" % neuron_type,
t * nTrain)
errors = np.zeros((nTest))
print("testing")
for test in range(nTest):
stim = makeSignal(t, f, dt=dt, seed=100 + test)
data = go(d1=d1,
e1=e1,
f1=f1,
d2=d2,
e2=e2,
f2=f2,
NPre=NPre,
N=N,
N2=N2,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim)
A = f3.filt(data['ens2'], dt=dt)
X = np.dot(A, d3)
Y = f.filt(data['tar2'], dt=dt)
error = rmse(X, Y)
errors[test] = error
plotState(data['times'], X, Y, error, "multiplyNew",
"%s_test%s" % (neuron_type, test), t)
A = f2.filt(data['ens'], dt=dt)
X = np.dot(A, d2)
Y = f.filt(data['tar'][:, 0] * data['tar'][:, 1], dt=dt).reshape(-1, 1)
plotState(data['times'], X, Y, rmse(X, Y), "multiplyNew",
"%s_pretest%s" % (neuron_type, test), t)
print('%s errors:' % neuron_type, errors)
np.savez("data/multiplyNew_%s.npz" % neuron_type,
d1=d1,
tauRise1=tauRise1,
tauFall1=tauFall1,
e1=e1,
d2=d2,
tauRise2=tauRise2,
tauFall2=tauFall2,
e2=e2,
d3=d3,
tauRise3=tauRise3,
tauFall3=tauFall3,
errors=errors)
return errors
def go(NPre=100, N=30, t=10, m=Uniform(30, 30), i=Uniform(-0.8, 0.8), seed=0, dt=0.001, f=DoubleExp(1e-3, 1e-1), fS=DoubleExp(1e-3, 1e-1), neuron_type=LIF(), d1=None, d2=None, f1=None, f2=None, e1=None, e2=None, l1=False, l2=False, test=False, freq=1, phase=0, tDrive=0.2):
A = [[1, 1e-1*2*np.pi*freq], [-1e-1*2*np.pi*freq, 1]] # tau*A + I
if isinstance(neuron_type, Bio) and not f1: f1=DoubleExp(1e-3, 1e-1)
if isinstance(neuron_type, Bio) and not f2: f2=DoubleExp(1e-3, 1e-1)
stim = lambda t: [np.sin(2*np.pi*freq*t+phase), np.cos(2*np.pi*freq*t+phase)]
with nengo.Network(seed=seed) as model:
inpt = nengo.Node(stim)
tar = nengo.Ensemble(1, 2, neuron_type=nengo.Direct())
pre = nengo.Ensemble(NPre, 2, max_rates=m, neuron_type=nengo.SpikingRectifiedLinear(), radius=2, seed=seed)
ens = nengo.Ensemble(N, 2, max_rates=m, intercepts=i, neuron_type=neuron_type, radius=2, seed=seed)
nengo.Connection(inpt, tar, synapse=None, transform=A, seed=seed)
nengo.Connection(inpt, pre, synapse=None, seed=seed)
c1 = nengo.Connection(pre, ens, synapse=f1, seed=seed, solver=NoSolver(d1))
pInpt = nengo.Probe(inpt, synapse=None)
pTar = nengo.Probe(tar, synapse=None)
pPre = nengo.Probe(pre.neurons, synapse=None)
pEns = nengo.Probe(ens.neurons, synapse=None)
# Encoder Learning (Bio)
if l1:
tarEns = nengo.Ensemble(N, 2, max_rates=m, intercepts=i, neuron_type=nengo.LIF(), seed=seed)
nengo.Connection(inpt, tarEns, synapse=None, seed=seed)
learnEncoders(c1, tarEns, fS)
pTarEns = nengo.Probe(tarEns.neurons, synapse=None)
if l2:
pre2 = nengo.Ensemble(NPre, 2, max_rates=m, neuron_type=nengo.LIF(), seed=seed, radius=2)
tarEns2 = nengo.Ensemble(N, 2, max_rates=m, intercepts=i, neuron_type=nengo.LIF(), seed=seed)
ens2 = nengo.Ensemble(N, 2, max_rates=m, intercepts=i, neuron_type=neuron_type, seed=seed, radius=2)
# ens3 = nengo.Ensemble(N, 2, max_rates=m, intercepts=i, neuron_type=neuron_type, seed=seed, radius=2)
# nengo.Connection(tar, pre2, synapse=f)
# c3 = nengo.Connection(ens, ens2, synapse=f2, seed=seed)
# c4 = nengo.Connection(pre2, ens3, synapse=f1, seed=seed)
# learnEncoders(c3, ens3, fS)
# pTarEns2 = nengo.Probe(ens3.neurons, synapse=None)
# pEns2 = nengo.Probe(ens2.neurons, synapse=None)
nengo.Connection(inpt, pre2, synapse=f)
nengo.Connection(pre2, tarEns2, synapse=f, seed=seed)
c3 = nengo.Connection(ens, ens2, synapse=f2, seed=seed)
learnEncoders(c3, tarEns2, fS, alpha=3e-7)
pTarEns2 = nengo.Probe(tarEns2.neurons, synapse=None)
pEns2 = nengo.Probe(ens2.neurons, synapse=None)
if test:
c2 = nengo.Connection(ens, ens, synapse=f2, seed=seed, solver=NoSolver(d2))
off = nengo.Node(lambda t: 1 if t>tDrive else 0)
nengo.Connection(off, pre.neurons, synapse=None, transform=-1e4*np.ones((NPre, 1)))
with nengo.Simulator(model, seed=seed, dt=dt, progress_bar=False) as sim:
if isinstance(neuron_type, Bio):
setWeights(c1, d1, e1)
if l2: setWeights(c3, d2, e2)
# if l2: setWeights(c4, d1, e1)
if test: setWeights(c2, d2, e2)
neuron.h.init()
sim.run(t, progress_bar=True)
reset_neuron(sim, model)
else:
sim.run(t, progress_bar=True)
e1 = c1.e if l1 else e1
e2 = c3.e if l2 else e2
return dict(
times=sim.trange(),
inpt=sim.data[pInpt],
tar=sim.data[pTar],
pre=sim.data[pPre],
ens=sim.data[pEns],
tarEns=sim.data[pTarEns] if l1 else None,
tarEns2=sim.data[pTarEns2] if l2 else None,
ens2=sim.data[pEns2] if l2 else None,
e1=e1,
e2=e2,
)
def goLIF(N=100,
t=10,
dt=0.001,
stim=lambda t: 0,
m=Uniform(30, 30),
i=Uniform(0, 0.8),
e=Choice([[1]]),
i2=Uniform(0.4, 1),
dFdfwEnsAMPA=None,
dFdfwEnsNMDA=None,
dEnsEnsAMPA=None,
dEnsEnsNMDA=None,
dEnsInhAMPA=None,
dEnsInhNMDA=None,
dInhFdfwGABA=None,
dInhEnsGABA=None,
fAMPA=DoubleExp(0.55e-3, 2.2e-3),
fNMDA=DoubleExp(2.3e-3, 95.0e-3),
fGABA=DoubleExp(0.5e-3, 1.5e-3),
x0=0,
seed=0):
with nengo.Network(seed=seed) as model:
inpt = nengo.Node(stim)
intg = nengo.Ensemble(1, 1, neuron_type=nengo.Direct())
fdfw = nengo.Ensemble(N, 1, max_rates=m, intercepts=i, seed=seed)
inh = nengo.Ensemble(N,
1,
encoders=e,
max_rates=m,
intercepts=i2,
neuron_type=LIF(),
seed=seed)
ens = nengo.Ensemble(N,
1,
encoders=e,
max_rates=m,
intercepts=i,
neuron_type=LIF(),
seed=seed)
nengo.Connection(inpt, intg, synapse=1 / s)
nengo.Connection(inpt, fdfw, synapse=None)
nengo.Connection(fdfw,
ens,
synapse=fAMPA,
solver=NoSolver(dFdfwEnsAMPA))
nengo.Connection(fdfw,
ens,
synapse=fNMDA,
solver=NoSolver(dFdfwEnsNMDA))
nengo.Connection(ens, ens, synapse=fAMPA, solver=NoSolver(dEnsEnsAMPA))
nengo.Connection(ens, ens, synapse=fNMDA, solver=NoSolver(dEnsEnsNMDA))
nengo.Connection(ens, inh, synapse=fAMPA, solver=NoSolver(dEnsInhAMPA))
nengo.Connection(ens, inh, synapse=fNMDA, solver=NoSolver(dEnsInhNMDA))
nengo.Connection(inh,
fdfw,
synapse=fGABA,
solver=NoSolver(dInhFdfwGABA))
nengo.Connection(inh, ens, synapse=fGABA, solver=NoSolver(dInhEnsGABA))
pInpt = nengo.Probe(inpt, synapse=None)
pIntg = nengo.Probe(intg, synapse=None)
pFdfw = nengo.Probe(fdfw.neurons, synapse=None)
pInh = nengo.Probe(inh.neurons, synapse=None)
pEns = nengo.Probe(ens.neurons, synapse=None)
with nengo.Simulator(model, seed=seed, progress_bar=False) as sim:
# init_lif(sim, ens, x0=x0)
sim.run(t, progress_bar=True)
return dict(times=sim.trange(),
inpt=sim.data[pInpt],
intg=sim.data[pIntg],
fdfw=sim.data[pFdfw],
inh=sim.data[pInh],
ens=sim.data[pEns])
def go(d_ens,
f_ens,
n_neurons=100,
t=10,
m=Uniform(30, 40),
i=Uniform(-1, 0.6),
seed=0,
dt=0.001,
neuron_type=nengo.LIF(),
f=DoubleExp(1e-2, 2e-1),
f_smooth=DoubleExp(1e-2, 2e-1),
freq=1,
w_ff=None,
w_fb=None,
e_ff=None,
e_fb=None,
L_ff=False,
L_fb=False,
L_fd=False,
supervised=False):
w = 2 * np.pi * freq
A = [[0, -w], [w, 0]]
B = [[1], [0]]
C = [[1, 0]]
D = [[0]]
sys = LinearSystem((A, B, C, D))
with nengo.Network(seed=seed) as model:
u = nengo.Node(lambda t: [np.sin(w * t), np.cos(w * t)])
# Ensembles
pre = nengo.Ensemble(300,
2,
neuron_type=SpikingRectifiedLinear(),
seed=seed,
radius=2)
ens = nengo.Ensemble(n_neurons,
2,
max_rates=m,
intercepts=i,
neuron_type=neuron_type,
seed=seed,
radius=2)
nengo.Connection(u, pre, synapse=None, seed=seed)
pre_ens = nengo.Connection(pre, ens, synapse=f, seed=seed)
if L_ff:
supv = nengo.Ensemble(n_neurons,
2,
max_rates=m,
intercepts=i,
neuron_type=LIF(),
seed=seed,
radius=2)
nengo.Connection(pre, supv, synapse=f, seed=seed)
node = LearningNode2(n_neurons, pre.n_neurons, pre_ens, k=3e-6)
nengo.Connection(pre.neurons, node[0:pre.n_neurons], synapse=f)
nengo.Connection(ens.neurons,
node[pre.n_neurons:pre.n_neurons + n_neurons],
synapse=f_smooth)
nengo.Connection(supv.neurons,
node[pre.n_neurons + n_neurons:pre.n_neurons +
2 * n_neurons],
synapse=f_smooth)
nengo.Connection(u, node[-2:], synapse=f)
p_supv = nengo.Probe(supv.neurons, synapse=None)
if L_fb or supervised:
supv = nengo.Ensemble(n_neurons,
2,
max_rates=m,
intercepts=i,
neuron_type=neuron_type,
seed=seed,
radius=2)
# supv2 = nengo.Ensemble(n_neurons, 2, max_rates=m, intercepts=i, neuron_type=neuron_type, seed=seed, radius=2)
# pre2 = nengo.Ensemble(300, 2, neuron_type=SpikingRectifiedLinear(), seed=seed, radius=2)
# nengo.Connection(u, pre2, synapse=f, seed=seed)
pre_supv = nengo.Connection(pre, supv, synapse=f, seed=seed)
# pre2_supv2 = nengo.Connection(pre2, supv2, synapse=f, seed=seed)
supv_ens = nengo.Connection(supv,
ens,
synapse=f_ens,
seed=seed,
solver=NoSolver(d_ens))
p_supv = nengo.Probe(supv.neurons, synapse=None)
# p_supv2 = nengo.Probe(supv2.neurons, synapse=None)
if L_fb:
node = LearningNode2(n_neurons, n_neurons, supv_ens, k=3e-6)
nengo.Connection(supv.neurons, node[0:n_neurons], synapse=f_ens)
nengo.Connection(ens.neurons,
node[n_neurons:2 * n_neurons],
synapse=f_smooth)
# nengo.Connection(supv2.neurons, node[2*n_neurons: 3*n_neurons], synapse=f_smooth)
nengo.Connection(supv.neurons,
node[2 * n_neurons:3 * n_neurons],
synapse=f_smooth)
nengo.Connection(u, node[-2:], synapse=f)
if not L_ff and not L_fb and not L_fd and not supervised:
off = nengo.Node(lambda t: (t > 1.0))
nengo.Connection(off,
pre.neurons,
synapse=None,
transform=-1e3 * np.ones((pre.n_neurons, 1)))
ens_ens = nengo.Connection(ens,
ens,
synapse=f_ens,
seed=seed,
solver=NoSolver(d_ens))
# Probes
p_u = nengo.Probe(u, synapse=None)
p_ens = nengo.Probe(ens.neurons, synapse=None)
with nengo.Simulator(model, seed=seed, dt=dt) as sim:
if np.any(w_ff):
for pre in range(pre.n_neurons):
for post in range(n_neurons):
if L_fb or supervised:
pre_supv.weights[pre, post] = w_ff[pre, post]
pre_supv.netcons[pre,
post].weight[0] = np.abs(w_ff[pre,
post])
pre_supv.netcons[
pre,
post].syn().e = 0 if w_ff[pre, post] > 0 else -70
# pre2_supv2.weights[pre, post] = w_ff[pre, post]
# pre2_supv2.netcons[pre, post].weight[0] = np.abs(w_ff[pre, post])
# pre2_supv2.netcons[pre, post].syn().e = 0 if w_ff[pre, post] > 0 else -70
else:
pre_ens.weights[pre, post] = w_ff[pre, post]
pre_ens.netcons[pre,
post].weight[0] = np.abs(w_ff[pre,
post])
pre_ens.netcons[
pre,
post].syn().e = 0 if w_ff[pre, post] > 0 else -70
if np.any(e_ff) and L_ff:
pre_ens.e = e_ff
if np.any(w_fb):
for pre in range(n_neurons):
for post in range(n_neurons):
if L_fb or supervised:
supv_ens.weights[pre, post] = w_fb[pre, post]
supv_ens.netcons[pre,
post].weight[0] = np.abs(w_fb[pre,
post])
supv_ens.netcons[
pre,
post].syn().e = 0 if w_fb[pre, post] > 0 else -70
else:
ens_ens.weights[pre, post] = w_fb[pre, post]
ens_ens.netcons[pre,
post].weight[0] = np.abs(w_fb[pre,
post])
ens_ens.netcons[
pre,
post].syn().e = 0 if w_fb[pre, post] > 0 else -70
if np.any(e_fb) and L_fb:
supv_ens.e = e_fb
neuron.h.init()
sim.run(t)
reset_neuron(sim, model)
if L_ff and hasattr(pre_ens, 'weights'):
w_ff = pre_ens.weights
e_ff = pre_ens.e
if L_fb and hasattr(supv_ens, 'weights'):
w_fb = supv_ens.weights
e_fb = supv_ens.e
return dict(
times=sim.trange(),
u=sim.data[p_u],
ens=sim.data[p_ens],
supv=sim.data[p_supv] if L_ff or L_fb or supervised else None,
# supv2=sim.data[p_supv2] if L_fb or supervised else None,
w_ff=w_ff,
w_fb=w_fb,
e_ff=e_ff,
e_fb=e_fb,
)
def go(NPre=300,
NBias=100,
N=30,
t=10,
seed=1,
dt=0.001,
Tff=0.3,
tTrans=0.01,
stage=None,
alpha=3e-7,
eMax=1e-1,
fPre=DoubleExp(1e-3, 1e-1),
fNMDA=DoubleExp(10.6e-3, 285e-3),
fGABA=DoubleExp(0.5e-3, 1.5e-3),
fS=DoubleExp(1e-3, 1e-1),
dPre=None,
dFdfw=None,
dEns=None,
dBias=None,
ePreFdfw=None,
ePreEns=None,
ePreBias=None,
eFdfwEns=None,
eBiasEns=None,
eEnsEns=None,
stimA=lambda t: 0,
stimB=lambda t: 0,
stimC=lambda t: 0.01,
DA=lambda t: 0):
with nengo.Network(seed=seed) as model:
inptA = nengo.Node(stimA)
inptB = nengo.Node(stimB)
inptC = nengo.Node(stimC)
preA = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
preB = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
preC = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
fdfw = nengo.Ensemble(N,
1,
neuron_type=Bio("Pyramidal", DA=DA),
seed=seed)
ens = nengo.Ensemble(N,
1,
neuron_type=Bio("Pyramidal", DA=DA),
seed=seed + 1)
bias = nengo.Ensemble(NBias,
1,
neuron_type=Bio("Interneuron", DA=DA),
seed=seed + 2)
tarFdfw = nengo.Ensemble(N,
1,
max_rates=Uniform(30, 30),
intercepts=Uniform(-0.8, 0.8),
seed=seed)
tarEns = nengo.Ensemble(N,
1,
max_rates=Uniform(30, 30),
intercepts=Uniform(-0.8, 0.8),
seed=seed + 1)
tarBias = nengo.Ensemble(NBias,
1,
max_rates=Uniform(30, 30),
intercepts=Uniform(-0.8, -0.2),
encoders=Choice([[1]]),
seed=seed + 2)
cA = nengo.Connection(inptA, preA, synapse=None, seed=seed)
cB = nengo.Connection(inptB, preB, synapse=None, seed=seed)
cC = nengo.Connection(inptC, preC, synapse=None, seed=seed)
pInptA = nengo.Probe(inptA, synapse=None)
pInptB = nengo.Probe(inptB, synapse=None)
pInptC = nengo.Probe(inptC, synapse=None)
pPreA = nengo.Probe(preA.neurons, synapse=None)
pPreB = nengo.Probe(preB.neurons, synapse=None)
pPreC = nengo.Probe(preC.neurons, synapse=None)
pFdfw = nengo.Probe(fdfw.neurons, synapse=None)
pTarFdfw = nengo.Probe(tarFdfw.neurons, synapse=None)
pEns = nengo.Probe(ens.neurons, synapse=None)
pTarEns = nengo.Probe(tarEns.neurons, synapse=None)
pBias = nengo.Probe(bias.neurons, synapse=None)
pTarBias = nengo.Probe(tarBias.neurons, synapse=None)
if stage == 0: # readout decoders for [preA, preB, preC]
pass
if stage == 1: # encoders for [preA, preC] to [fdfw, bias]
nengo.Connection(inptA, tarFdfw, synapse=fPre, seed=seed)
nengo.Connection(inptC, tarBias, synapse=fPre, seed=seed)
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c2 = nengo.Connection(preC,
bias,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
learnEncoders(c1,
tarFdfw,
fS,
alpha=3 * alpha,
eMax=3 * eMax,
tTrans=tTrans)
learnEncoders(c2,
tarBias,
fS,
alpha=alpha,
eMax=eMax,
tTrans=tTrans)
if stage == 2: # readout decoders for fdfw and bias
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c2 = nengo.Connection(preC,
bias,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
if stage == 3: # encoders for [bias] to ens
# nengo.Connection(inptC, tarBias, synapse=fPre, seed=seed)
nengo.Connection(inptC, tarEns, synapse=fGABA, seed=seed)
c1 = nengo.Connection(preC,
bias,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c2 = nengo.Connection(bias,
ens,
synapse=GABA(),
solver=NoSolver(dBias),
seed=seed)
learnEncoders(c2,
tarEns,
fS,
alpha=1e3 * alpha,
eMax=1e3 * eMax,
tTrans=tTrans)
if stage == 4: # encoders for [preB] to [ens]
# nengo.Connection(inptC, tarBias, synapse=fPre, seed=seed)
nengo.Connection(inptC, tarEns, synapse=fGABA, seed=seed)
nengo.Connection(inptB, tarEns, synapse=fPre, seed=seed)
c1 = nengo.Connection(preC,
bias,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c2 = nengo.Connection(bias,
ens,
synapse=GABA(),
solver=NoSolver(dBias),
seed=seed)
c3 = nengo.Connection(preB,
ens,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
learnEncoders(c3,
tarEns,
fS,
alpha=3 * alpha,
eMax=3 * eMax,
tTrans=tTrans)
if stage == 5: # encoders for [fdfw] to ens
cB.synapse = fNMDA
tarPreA = nengo.Ensemble(1, 1, neuron_type=nengo.Direct())
tarPreB = nengo.Ensemble(1, 1, neuron_type=nengo.Direct())
tarPreC = nengo.Ensemble(1, 1, neuron_type=nengo.Direct())
nengo.Connection(inptA, tarPreA, synapse=fPre, seed=seed)
nengo.Connection(inptB, tarPreB, synapse=fNMDA, seed=seed)
nengo.Connection(inptC, tarPreC, synapse=fPre, seed=seed)
nengo.Connection(tarPreA,
tarEns,
synapse=fNMDA,
transform=Tff,
seed=seed)
nengo.Connection(tarPreB, tarEns, synapse=fPre, seed=seed)
nengo.Connection(tarPreC, tarEns, synapse=fGABA, seed=seed)
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c2 = nengo.Connection(preB,
ens,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c3 = nengo.Connection(preC,
bias,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c4 = nengo.Connection(fdfw,
ens,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
c5 = nengo.Connection(bias,
ens,
synapse=GABA(),
solver=NoSolver(dBias),
seed=seed)
learnEncoders(c4,
tarEns,
fS,
alpha=3 * alpha,
eMax=3 * eMax,
tTrans=tTrans)
if stage == 6: # readout decoders for ens
cB.synapse = fNMDA
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c2 = nengo.Connection(preB,
ens,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c3 = nengo.Connection(preC,
bias,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c4 = nengo.Connection(fdfw,
ens,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
c5 = nengo.Connection(bias,
ens,
synapse=GABA(),
solver=NoSolver(dBias),
seed=seed)
if stage == 7: # encoders from ens to ens
preB2 = nengo.Ensemble(NPre,
1,
max_rates=Uniform(30, 30),
seed=seed)
ens2 = nengo.Ensemble(N,
1,
neuron_type=Bio("Pyramidal", DA=DA),
seed=seed + 1) # acts as preB input to ens
ens3 = nengo.Ensemble(N,
1,
neuron_type=Bio("Pyramidal", DA=DA),
seed=seed + 1) # acts as tarEns
nengo.Connection(inptB, preB2, synapse=fNMDA, seed=seed)
pTarEns = nengo.Probe(ens3.neurons, synapse=None)
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c2 = nengo.Connection(preB,
ens2,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c3 = nengo.Connection(preB2,
ens3,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c4 = nengo.Connection(preC,
bias,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c5 = nengo.Connection(fdfw,
ens,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
c6 = nengo.Connection(fdfw,
ens3,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
c7 = nengo.Connection(bias,
ens,
synapse=GABA(),
solver=NoSolver(dBias),
seed=seed)
c8 = nengo.Connection(bias,
ens2,
synapse=GABA(),
solver=NoSolver(dBias),
seed=seed)
c9 = nengo.Connection(bias,
ens3,
synapse=GABA(),
solver=NoSolver(dBias),
seed=seed)
c10 = nengo.Connection(ens2,
ens,
synapse=NMDA(),
solver=NoSolver(dEns),
seed=seed)
learnEncoders(c10, ens3, fS, alpha=alpha, eMax=eMax, tTrans=tTrans)
if stage == 8: # test
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c2 = nengo.Connection(preC,
bias,
synapse=fPre,
solver=NoSolver(dPre),
seed=seed)
c3 = nengo.Connection(fdfw,
ens,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
c4 = nengo.Connection(bias,
ens,
synapse=GABA(),
solver=NoSolver(dBias),
seed=seed)
c5 = nengo.Connection(ens,
ens,
synapse=NMDA(),
solver=NoSolver(dEns),
seed=seed)
with nengo.Simulator(model, seed=seed, dt=dt, progress_bar=False) as sim:
if stage == 0:
pass
if stage == 1:
setWeights(c1, dPre, ePreFdfw)
setWeights(c2, dPre, ePreBias)
if stage == 2:
setWeights(c1, dPre, ePreFdfw)
setWeights(c2, dPre, ePreBias)
if stage == 3:
setWeights(c1, dPre, ePreBias)
setWeights(c2, dBias, eBiasEns)
if stage == 4:
setWeights(c1, dPre, ePreBias)
setWeights(c2, dBias, eBiasEns)
setWeights(c3, dPre, ePreEns)
if stage == 5:
setWeights(c1, dPre, ePreFdfw)
setWeights(c2, dPre, ePreEns)
setWeights(c3, dPre, ePreBias)
setWeights(c4, dFdfw, eFdfwEns)
setWeights(c5, dBias, eBiasEns)
if stage == 6:
setWeights(c1, dPre, ePreFdfw)
setWeights(c2, dPre, ePreEns)
setWeights(c3, dPre, ePreBias)
setWeights(c4, dFdfw, eFdfwEns)
setWeights(c5, dBias, eBiasEns)
if stage == 7:
setWeights(c1, dPre, ePreFdfw)
setWeights(c2, dPre, ePreEns)
setWeights(c3, dPre, ePreEns)
setWeights(c4, dPre, ePreBias)
setWeights(c5, dFdfw, eFdfwEns)
setWeights(c6, dFdfw, eFdfwEns)
setWeights(c7, dBias, eBiasEns)
setWeights(c8, dBias, eBiasEns)
setWeights(c9, dBias, eBiasEns)
setWeights(c10, dEns, eEnsEns)
if stage == 8:
setWeights(c1, dPre, ePreFdfw)
setWeights(c2, dPre, ePreBias)
setWeights(c3, dFdfw, eFdfwEns)
setWeights(c4, dBias, eBiasEns)
setWeights(c5, dEns, eEnsEns)
neuron.h.init()
sim.run(t, progress_bar=True)
reset_neuron(sim, model)
ePreFdfw = c1.e if stage == 1 else ePreFdfw
ePreBias = c2.e if stage == 1 else ePreBias
eBiasEns = c2.e if stage == 3 else eBiasEns
ePreEns = c3.e if stage == 4 else ePreEns
eFdfwEns = c4.e if stage == 5 else eFdfwEns
eEnsEns = c10.e if stage == 7 else eEnsEns
return dict(
times=sim.trange(),
inptA=sim.data[pInptA],
inptB=sim.data[pInptB],
inptC=sim.data[pInptC],
preA=sim.data[pPreA],
fdfw=sim.data[pFdfw],
ens=sim.data[pEns],
bias=sim.data[pBias],
tarFdfw=sim.data[pTarFdfw],
tarEns=sim.data[pTarEns],
tarBias=sim.data[pTarBias],
ePreFdfw=ePreFdfw,
ePreEns=ePreEns,
ePreBias=ePreBias,
eFdfwEns=eFdfwEns,
eBiasEns=eBiasEns,
eEnsEns=eEnsEns,
)
def go(NPre=100,
N=100,
t=10,
m=Uniform(30, 30),
i=Uniform(-0.8, 0.8),
seed=0,
dt=0.001,
f=DoubleExp(1e-3, 1e-2),
fS=DoubleExp(1e-3, 1e-1),
neuron_type=LIF(),
d1a=None,
d1b=None,
d2=None,
f1a=None,
f1b=None,
f2=None,
e1a=None,
e1b=None,
e2=None,
l1a=False,
l1b=False,
l2=False,
l3=False,
test=False,
stim=lambda t: np.sin(t),
stim2=lambda t: 0):
with nengo.Network(seed=seed) as model:
inpt = nengo.Node(stim)
intg = nengo.Ensemble(1, 1, neuron_type=nengo.Direct())
preInpt = nengo.Ensemble(NPre, 1, radius=3, max_rates=m, seed=seed)
preIntg = nengo.Ensemble(NPre, 1, max_rates=m, seed=seed)
ens = nengo.Ensemble(N,
1,
max_rates=m,
intercepts=i,
neuron_type=neuron_type,
seed=seed)
nengo.Connection(inpt, intg, synapse=1 / s, seed=seed)
c0a = nengo.Connection(inpt, preInpt, synapse=None, seed=seed)
c0b = nengo.Connection(intg, preIntg, synapse=None, seed=seed)
c1a = nengo.Connection(preInpt,
ens,
synapse=f1a,
solver=NoSolver(d1a),
seed=seed)
pInpt = nengo.Probe(inpt, synapse=None)
pIntg = nengo.Probe(intg, synapse=None)
pPreInpt = nengo.Probe(preInpt.neurons, synapse=None)
pPreIntg = nengo.Probe(preIntg.neurons, synapse=None)
pEns = nengo.Probe(ens.neurons, synapse=None)
if l1b: # preIntg-to-ens
tarEns = nengo.Ensemble(N,
1,
max_rates=m,
intercepts=i,
neuron_type=nengo.LIF(),
seed=seed)
nengo.Connection(preIntg,
tarEns,
synapse=f1b,
solver=NoSolver(d1b),
seed=seed + 1)
c1b = nengo.Connection(preIntg,
ens,
synapse=f1b,
solver=NoSolver(d1b),
seed=seed + 1)
learnEncoders(c1b, tarEns, fS)
pTarEns = nengo.Probe(tarEns.neurons, synapse=None)
if l1a: # preInpt-to-ens, given preIntg-to-ens
inpt2 = nengo.Node(stim2)
tarEns = nengo.Ensemble(N,
1,
max_rates=m,
intercepts=i,
neuron_type=nengo.LIF(),
seed=seed)
nengo.Connection(preInpt,
tarEns,
synapse=f1a,
solver=NoSolver(d1a),
seed=seed)
c0b.transform = 0
nengo.Connection(inpt2, preIntg, synapse=None, seed=seed)
nengo.Connection(preIntg,
tarEns,
synapse=f1b,
solver=NoSolver(d1b),
seed=seed + 1)
c1b = nengo.Connection(preIntg,
ens,
synapse=f1b,
solver=NoSolver(d1b),
seed=seed + 1)
learnEncoders(c1a, tarEns, fS)
pTarEns = nengo.Probe(tarEns.neurons, synapse=None)
if l2: # ens readout, given preIntg and preInpt
c1b = nengo.Connection(preIntg,
ens,
synapse=f1b,
solver=NoSolver(d1b),
seed=seed + 1)
if l3: # ens2-to-ens, given preInpt-ens and preIntg-ens2
ens2 = nengo.Ensemble(N,
1,
max_rates=m,
intercepts=i,
neuron_type=neuron_type,
seed=seed)
c0a.synapse = f
c2a = nengo.Connection(preInpt,
ens2,
synapse=f1a,
solver=NoSolver(d1a),
seed=seed)
c2b = nengo.Connection(preIntg,
ens2,
synapse=f1b,
solver=NoSolver(d1b),
seed=seed + 1)
c3 = nengo.Connection(ens2,
ens,
synapse=f2,
solver=NoSolver(d2),
seed=seed)
learnEncoders(c3, ens2, fS)
pTarEns2 = nengo.Probe(ens2.neurons, synapse=None)
if test:
c5 = nengo.Connection(ens,
ens,
synapse=f2,
solver=NoSolver(d2),
seed=seed)
with nengo.Simulator(model, seed=seed, dt=dt, progress_bar=False) as sim:
if isinstance(neuron_type, Bio):
if l1b:
setWeights(c1b, d1b, e1b)
if l1a:
setWeights(c1a, d1a, e1a)
setWeights(c1b, d1b, e1b)
if l2:
setWeights(c1a, d1a, e1a)
setWeights(c1b, d1b, e1b)
if l3:
setWeights(c1a, d1a, e1a)
setWeights(c2a, d1a, e1a)
setWeights(c2b, d1b, e1b)
setWeights(c3, d2, e2)
if test:
setWeights(c1a, d1a, e1a)
setWeights(c5, d2, e2)
neuron.h.init()
sim.run(t, progress_bar=True)
reset_neuron(sim, model)
else:
sim.run(t, progress_bar=True)
e1a = c1a.e if l1a else e1a
e1b = c1b.e if l1b else e1b
e2 = c3.e if l3 else e2
return dict(
times=sim.trange(),
inpt=sim.data[pInpt],
intg=sim.data[pIntg],
preInpt=sim.data[pPreInpt],
preIntg=sim.data[pPreIntg],
ens=sim.data[pEns],
tarEns=sim.data[pTarEns] if l1a or l1b else None,
tarEns2=sim.data[pTarEns2] if l3 else None,
e1a=e1a,
e1b=e1b,
e2=e2,
)
def run(NPre=100,
N=100,
t=10,
nTrain=10,
nTest=30,
nEnc=10,
neuron_type=LIF(),
dt=0.001,
f=DoubleExp(1e-3, 1e-1),
fS=DoubleExp(1e-3, 1e-1),
Tff=0.1,
Tfb=1.0,
reg=1e-3,
tauRiseMax=5e-2,
tauFallMax=3e-1,
load=False,
file=None):
print('\nNeuron Type: %s' % neuron_type)
if load:
d1a = np.load(file)['d1a']
d1b = np.load(file)['d1b']
tauRise1a = np.load(file)['tauRise1a']
tauRise1b = np.load(file)['tauRise1b']
tauFall1a = np.load(file)['tauFall1a']
tauFall1b = np.load(file)['tauFall1b']
f1a = DoubleExp(tauRise1a, tauFall1a)
f1b = DoubleExp(tauRise1b, tauFall1b)
else:
print('readout decoders for preInpt and preIntg')
spikesInpt = np.zeros((nTrain, int(t / 0.001), NPre))
spikesIntg = np.zeros((nTrain, int(t / 0.001), NPre))
targetsInpt = np.zeros((nTrain, int(t / 0.001), 1))
targetsIntg = np.zeros((nTrain, int(t / 0.001), 1))
for n in range(nTrain):
stim = makeSignal(t, f, dt=0.001, seed=n)
data = go(NPre=NPre,
N=N,
t=t,
dt=0.001,
f=f,
fS=fS,
neuron_type=LIF(),
stim=stim)
spikesInpt[n] = data['preInpt']
spikesIntg[n] = data['preIntg']
targetsInpt[n] = f.filt(Tff * data['inpt'], dt=0.001)
targetsIntg[n] = f.filt(data['intg'], dt=0.001)
d1a, f1a, tauRise1a, tauFall1a, X1a, Y1a, error1a = decode(
spikesInpt,
targetsInpt,
nTrain,
dt=0.001,
reg=reg,
name="integrateNew",
tauRiseMax=tauRiseMax,
tauFallMax=tauFallMax)
d1b, f1b, tauRise1b, tauFall1b, X1b, Y1b, error1b = decode(
spikesIntg,
targetsIntg,
nTrain,
dt=0.001,
reg=reg,
name="integrateNew",
tauRiseMax=tauRiseMax,
tauFallMax=tauFallMax)
np.savez("data/integrateNew_%s.npz" % neuron_type,
d1a=d1a,
d1b=d1b,
tauRise1a=tauRise1a,
tauRise1b=tauRise1b,
tauFall1a=tauFall1a,
tauFall1b=tauFall1b)
times = np.arange(0, t * nTrain, 0.001)
plotState(times, X1a, Y1a, error1a, "integrateNew",
"%s_preInpt" % neuron_type, t * nTrain)
plotState(times, X1b, Y1b, error1b, "integrateNew",
"%s_preIntg" % neuron_type, t * nTrain)
if load:
e1a = np.load(file)['e1a']
e1b = np.load(file)['e1b']
elif isinstance(neuron_type, Bio):
e1a = np.zeros((NPre, N, 1))
e1b = np.zeros((NPre, N, 1))
print("encoders for preIntg-to-ens")
for n in range(nEnc):
stim = makeSignal(t, f, dt=dt, seed=n)
data = go(d1a=d1a,
d1b=d1b,
e1a=e1a,
e1b=e1b,
f1a=f1a,
f1b=f1b,
NPre=NPre,
N=N,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim,
l1b=True)
e1b = data['e1b']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateNew", "preIntgToEns")
np.savez("data/integrateNew_%s.npz" % neuron_type,
d1a=d1a,
d1b=d1b,
tauRise1a=tauRise1a,
tauRise1b=tauRise1b,
tauFall1a=tauFall1a,
tauFall1b=tauFall1b,
e1a=e1a,
e1b=e1b)
print("encoders for preInpt-to-ens")
for n in range(nEnc):
stim = makeSignal(t, f, dt=dt, seed=n)
# stim2 = makeSignal(t, f, dt=dt, seed=n, value=0.5)
# stim2 = makeSignal(t, f, dt=dt, norm='u', freq=0.25, value=0.8, seed=100+n)
stim2 = makeSin(t, f, dt=dt, seed=n)
data = go(d1a=d1a,
d1b=d1b,
e1a=e1a,
e1b=e1b,
f1a=f1a,
f1b=f1b,
NPre=NPre,
N=N,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim,
l1a=True,
stim2=stim2)
e1a = data['e1a']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateNew", "preInptToEns")
np.savez("data/integrateNew_%s.npz" % neuron_type,
d1a=d1a,
d1b=d1b,
tauRise1a=tauRise1a,
tauRise1b=tauRise1b,
tauFall1a=tauFall1a,
tauFall1b=tauFall1b,
e1a=e1a,
e1b=e1b)
else:
e1a = np.zeros((NPre, N, 1))
e1b = np.zeros((NPre, N, 1))
if load:
d2 = np.load(file)['d2']
tauRise2 = np.load(file)['tauRise2']
tauFall2 = np.load(file)['tauFall2']
f2 = DoubleExp(tauRise2, tauFall2)
else:
print('readout decoders for ens')
spikes = np.zeros((nTrain, int(t / dt), N))
targets = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stim = makeSignal(t, f, dt=dt, seed=n)
data = go(d1a=d1a,
d1b=d1b,
e1a=e1a,
e1b=e1b,
f1a=f1a,
f1b=f1b,
NPre=NPre,
N=N,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim,
l2=True)
spikes[n] = data['ens']
targets[n] = f.filt(Tfb * data['intg'], dt=dt)
d2, f2, tauRise2, tauFall2, X, Y, error = decode(spikes,
targets,
nTrain,
dt=dt,
reg=reg,
tauRiseMax=tauRiseMax,
tauFallMax=tauFallMax,
name="integrateNew")
np.savez("data/integrateNew_%s.npz" % neuron_type,
d1a=d1a,
d1b=d1b,
tauRise1a=tauRise1a,
tauRise1b=tauRise1b,
tauFall1a=tauFall1a,
tauFall1b=tauFall1b,
e1a=e1a,
e1b=e1b,
d2=d2,
tauRise2=tauRise2,
tauFall2=tauFall2)
times = np.arange(0, t * nTrain, dt)
plotState(times, X, Y, error, "integrateNew", "%s_ens" % neuron_type,
t * nTrain)
if load:
e2 = np.load(file)['e2']
elif isinstance(neuron_type, Bio):
print("encoders from ens2 to ens")
e2 = np.zeros((N, N, 1))
for n in range(nEnc):
stim = makeSignal(t, f, dt=dt, seed=n)
#stim = makeSin(t, f, dt=dt, seed=n)
data = go(d1a=d1a,
d1b=d1b,
d2=d2,
e1a=e1a,
e1b=e1b,
e2=e2,
f1a=f1a,
f1b=f1b,
f2=f2,
NPre=NPre,
N=N,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim,
l3=True)
e2 = data['e2']
plotActivity(t, dt, fS, data['times'], data['ens'],
data['tarEns2'], "integrateNew", "Ens2Ens")
np.savez("data/integrateNew_%s.npz" % neuron_type,
d1a=d1a,
d1b=d1b,
tauRise1a=tauRise1a,
tauRise1b=tauRise1b,
tauFall1a=tauFall1a,
tauFall1b=tauFall1b,
e1a=e1a,
e1b=e1b,
d2=d2,
tauRise2=tauRise2,
tauFall2=tauFall2,
e2=e2)
else:
e2 = np.zeros((N, N, 1))
print("testing")
errors = np.zeros((nTest))
for test in range(nTest):
stim = makeSignal(t, f, dt=dt, seed=200 + test)
data = go(d1a=d1a,
d2=d2,
e1a=e1a,
e2=e2,
f1a=f1a,
f2=f2,
NPre=NPre,
N=N,
t=t,
dt=dt,
f=f,
fS=fS,
neuron_type=neuron_type,
stim=stim,
test=True)
A = f2.filt(data['ens'], dt=dt)
X = np.dot(A, d2)
Y = f.filt(data['intg'], dt=dt)
U = f.filt(f.filt(Tff * data['inpt'], dt=dt))
error = rmse(X, Y)
errorU = rmse(X, U)
errors[test] = error
plotState(data['times'], X, Y, error, "integrateNew",
"%s_test%s" % (neuron_type, test), t)
#plotState(data['times'], X, U, errorU, "integrateNew", "%s_inpt%s"%(neuron_type, test), t)
print('%s errors:' % neuron_type, errors)
np.savez("data/integrateNew_%s.npz" % neuron_type,
d1a=d1a,
d1b=d1b,
tauRise1a=tauRise1a,
tauRise1b=tauRise1b,
tauFall1a=tauFall1a,
tauFall1b=tauFall1b,
e1a=e1a,
e1b=e1b,
d2=d2,
tauRise2=tauRise2,
tauFall2=tauFall2,
e2=e2,
errors=errors)
return errors
def run(n_neurons=100,
t=20,
t_test=10,
t_enc=30,
dt=0.001,
f=DoubleExp(1e-2, 2e-1),
penalty=0,
reg=1e-1,
freq=1,
tt=5.0,
tt_test=5.0,
neuron_type=LIF(),
load_fd=False,
load_w=None,
supervised=False):
d_ens = np.zeros((n_neurons, 2))
f_ens = f
w_ff = None
w_fb = None
e_ff = None
e_fb = None
f_smooth = DoubleExp(1e-2, 2e-1)
print('Neuron Type: %s' % neuron_type)
if isinstance(neuron_type, DurstewitzNeuron):
if load_w:
w_ff = np.load(load_w)['w_ff']
e_ff = np.load(load_w)['e_ff']
else:
print('optimizing encoders from pre to ens')
data = go(d_ens,
f_ens,
n_neurons=n_neurons,
t=t_enc + tt,
f=f,
dt=dt,
neuron_type=neuron_type,
w_ff=w_ff,
e_ff=e_ff,
L_ff=True)
w_ff = data['w_ff']
e_ff = data['e_ff']
np.savez('data/oscillate_w.npz', w_ff=w_ff, e_ff=e_ff)
fig, ax = plt.subplots()
sns.distplot(np.ravel(w_ff), ax=ax, kde=False)
ax.set(xlabel='weights', ylabel='frequency')
plt.savefig("plots/tuning/oscillate_%s_w_ff.pdf" % (neuron_type))
a_ens = f_smooth.filt(data['ens'], dt=dt)
a_supv = f_smooth.filt(data['supv'], dt=dt)
for n in range(n_neurons):
fig, ax = plt.subplots(1, 1)
ax.plot(data['times'], a_supv[:, n], alpha=0.5, label='supv')
ax.plot(data['times'], a_ens[:, n], alpha=0.5, label='ens')
ax.set(ylim=((0, 40)))
plt.legend()
plt.savefig('plots/tuning/oscillate_pre_ens_activity_%s.pdf' %
(n))
plt.close('all')
if load_fd:
load = np.load(load_fd)
d_ens = load['d_ens']
taus_ens = load['taus_ens']
f_ens = DoubleExp(taus_ens[0], taus_ens[1])
else:
print('gathering filter/decoder training data for ens')
data = go(d_ens,
f_ens,
n_neurons=n_neurons,
t=t + tt,
f=f,
dt=dt,
neuron_type=neuron_type,
w_ff=w_ff,
L_fd=True)
trans = int(tt / dt)
d_ens, f_ens, taus_ens = df_opt(data['u'][trans:],
data['ens'][trans:],
f,
dt=dt,
name='oscillate_%s' % neuron_type,
reg=reg,
penalty=penalty)
np.savez('data/oscillate_%s_fd.npz' % neuron_type,
d_ens=d_ens,
taus_ens=taus_ens)
times = np.arange(0, 1, 0.0001)
fig, ax = plt.subplots()
ax.plot(times,
f.impulse(len(times), dt=0.0001),
label=r"$f^x, \tau_1=%.3f, \tau_2=%.3f$" %
(-1. / f.poles[0], -1. / f.poles[1]))
ax.plot(times,
f_ens.impulse(len(times), dt=0.0001),
label=r"$f^{ens}, \tau_1=%.3f, \tau_2=%.3f, d: %s/%s$" %
(-1. / f_ens.poles[0], -1. / f_ens.poles[1],
np.count_nonzero(d_ens), n_neurons))
ax.set(xlabel='time (seconds)',
ylabel='impulse response',
ylim=((0, 10)))
ax.legend(loc='upper right')
plt.tight_layout()
plt.savefig("plots/oscillate_%s_filters_ens.pdf" % neuron_type)
a_ens = f_ens.filt(data['ens'], dt=dt)
x = f.filt(data['u'], dt=dt)
xhat_ens = np.dot(a_ens, d_ens)
rmse_ens = rmse(xhat_ens, x)
fig, ax = plt.subplots()
ax.plot(data['times'], x, linestyle="--", label='x')
ax.plot(data['times'], xhat_ens, label='ens, rmse=%.3f' % rmse_ens)
ax.set(xlabel='time (s)', ylabel=r'$\mathbf{x}$', title="pre_ens")
plt.legend(loc='upper right')
plt.savefig("plots/oscillate_%s_pre_ens_train.pdf" % neuron_type)
if isinstance(neuron_type, DurstewitzNeuron):
if load_w:
w_fb = np.load(load_w)['w_fb']
e_fb = np.load(load_w)['e_fb']
else:
print('optimizing encoders from supv to ens')
data = go(d_ens,
f_ens,
n_neurons=n_neurons,
t=t_enc + tt,
f=f,
dt=dt,
neuron_type=neuron_type,
w_ff=w_ff,
w_fb=w_fb,
e_fb=e_fb,
L_fb=True)
w_fb = data['w_fb']
e_fb = data['e_fb']
np.savez('data/oscillate_w.npz',
w_ff=w_ff,
e_ff=e_ff,
w_fb=w_fb,
e_fb=e_fb)
fig, ax = plt.subplots()
sns.distplot(np.ravel(w_fb), ax=ax, kde=False)
ax.set(xlabel='weights', ylabel='frequency')
plt.savefig("plots/tuning/oscillate_%s_w_fb.pdf" % (neuron_type))
a_ens = f_smooth.filt(data['ens'], dt=dt)
a_supv = f_smooth.filt(data['supv'], dt=dt)
# a_supv2 = f_smooth.filt(data['supv2'], dt=dt)
for n in range(n_neurons):
fig, ax = plt.subplots(1, 1)
ax.plot(data['times'], a_supv[:, n], alpha=0.5, label='supv')
# ax.plot(data['times'], a_supv2[:,n], alpha=0.5, label='supv2')
ax.plot(data['times'], a_ens[:, n], alpha=0.5, label='ens')
ax.set(ylim=((0, 40)))
plt.legend()
plt.savefig('plots/tuning/oscillate_supv_ens_activity_%s.pdf' %
(n))
plt.close('all')
print("Testing")
if supervised:
data = go(d_ens,
f_ens,
n_neurons=n_neurons,
t=t_test + tt_test,
f=f,
dt=dt,
neuron_type=neuron_type,
w_ff=w_ff,
w_fb=w_fb,
supervised=True)
a_ens = f_ens.filt(data['ens'], dt=dt)
a_supv = f_ens.filt(data['supv'], dt=dt)
# a_supv2 = f_ens.filt(data['supv2'], dt=dt)
xhat_ens_0 = np.dot(a_ens, d_ens)[:, 0]
xhat_ens_1 = np.dot(a_ens, d_ens)[:, 1]
xhat_supv_0 = np.dot(a_supv, d_ens)[:, 0]
xhat_supv_1 = np.dot(a_supv, d_ens)[:, 1]
# xhat_supv2_0 = np.dot(a_supv2, d_ens)[:,0]
# xhat_supv2_1 = np.dot(a_supv2, d_ens)[:,1]
x_0 = f.filt(data['u'], dt=dt)[:, 0]
x_1 = f.filt(data['u'], dt=dt)[:, 1]
x2_0 = f.filt(x_0, dt=dt)
x2_1 = f.filt(x_1, dt=dt)
times = data['times']
fig, ax = plt.subplots()
ax.plot(times, x_0, linestyle="--", label='x_0')
ax.plot(times, x2_0, linestyle="--", label='x2_0')
ax.plot(times, xhat_supv_0, label='supv')
ax.plot(times, xhat_ens_0, label='ens')
# ax.plot(times, xhat_supv2_0, label='supv2')
ax.set(xlim=((0, t_test)),
ylim=((-1, 1)),
xlabel='time (s)',
ylabel=r'$\mathbf{x}$')
plt.legend(loc='upper right')
plt.savefig("plots/oscillate_%s_supervised_0.pdf" % neuron_type)
fig, ax = plt.subplots()
ax.plot(times, x_1, linestyle="--", label='x_1')
ax.plot(times, x2_1, linestyle="--", label='x2_1')
ax.plot(times, xhat_supv_1, label='supv')
ax.plot(times, xhat_ens_1, label='ens')
# ax.plot(times, xhat_supv2_1, label='supv2')
ax.set(xlim=((0, t_test)),
ylim=((-1, 1)),
xlabel='time (s)',
ylabel=r'$\mathbf{x}$')
plt.legend(loc='upper right')
plt.savefig("plots/oscillate_%s_supervised_1.pdf" % neuron_type)
else:
data = go(d_ens,
f_ens,
n_neurons=n_neurons,
t=t_test + tt_test,
f=f,
dt=dt,
neuron_type=neuron_type,
w_ff=w_ff,
w_fb=w_fb)
a_ens = f_ens.filt(data['ens'], dt=dt)
xhat_ens_0 = np.dot(a_ens, d_ens)[:, 0]
xhat_ens_1 = np.dot(a_ens, d_ens)[:, 1]
x_0 = f.filt(data['u'], dt=dt)[:, 0]
x_1 = f.filt(data['u'], dt=dt)[:, 1]
x2_0 = f.filt(x_0, dt=dt)
x2_1 = f.filt(x_1, dt=dt)
times = data['times']
# fig, ax = plt.subplots()
# ax.plot(times, x_0, linestyle="--", label='x0')
# # ax.plot(times, sinusoid_0, label='best fit sinusoid_0')
# ax.plot(times, xhat_ens_0, label='ens')
# ax.set(xlim=((0, t_test)), ylim=((-1, 1)), xlabel='time (s)', ylabel=r'$\mathbf{x}$')
# plt.legend(loc='upper right')
# plt.savefig("plots/oscillate_%s_test_0.pdf"%neuron_type)
# fig, ax = plt.subplots()
# ax.plot(times, x_1, linestyle="--", label='x1')
# # ax.plot(times, sinusoid_1, label='best fit sinusoid_1')
# ax.plot(times, xhat_ens_1, label='ens')
# ax.set(xlim=((0, t_test)), ylim=((-1, 1)), xlabel='time (s)', ylabel=r'$\mathbf{x}$')
# plt.legend(loc='upper right')
# plt.savefig("plots/oscillate_%s_test_1.pdf"%neuron_type)
# curve fit to a sinusoid of arbitrary frequency, phase, magnitude
print('Curve fitting')
trans = int(tt_test / dt)
step = int(0.001 / dt)
def sinusoid(t, freq, phase, mag, dt=dt): # mag
return f.filt(mag *
np.sin(t * 2 * np.pi * freq + 2 * np.pi * phase),
dt=dt)
p0 = [1, 0, 1]
param_0, _ = curve_fit(sinusoid,
times[trans:],
xhat_ens_0[trans:],
p0=p0)
param_1, _ = curve_fit(sinusoid,
times[trans:],
xhat_ens_1[trans:],
p0=p0)
print('param0', param_0)
print('param1', param_1)
sinusoid_0 = sinusoid(times, param_0[0], param_0[1], param_0[2])
sinusoid_1 = sinusoid(times, param_1[0], param_1[1], param_1[2])
# error is rmse of xhat and best fit sinusoid times freq error of best fit sinusoid to x
freq_error_0 = np.abs(freq - param_0[1])
freq_error_1 = np.abs(freq - param_1[1])
rmse_0 = rmse(xhat_ens_0[trans::step], sinusoid_0[trans::step])
rmse_1 = rmse(xhat_ens_1[trans::step], sinusoid_1[trans::step])
scaled_rmse_0 = (1 + freq_error_0) * rmse_0
scaled_rmse_1 = (1 + freq_error_1) * rmse_1
fig, ax = plt.subplots()
ax.plot(times, x_0, linestyle="--", label='x0')
ax.plot(times, sinusoid_0, label='best fit sinusoid_0')
ax.plot(times,
xhat_ens_0,
label='ens, scaled rmse=%.3f' % scaled_rmse_0)
ax.axvline(tt_test, label=r"$t_{transient}$")
ax.set(ylim=((-1, 1)), xlabel='time (s)', ylabel=r'$\mathbf{x}$')
plt.legend(loc='upper right')
plt.savefig("plots/oscillate_%s_test_0.pdf" % neuron_type)
fig, ax = plt.subplots()
ax.plot(times, x_1, linestyle="--", label='x1')
ax.plot(times, sinusoid_1, label='best fit sinusoid_1')
ax.plot(times,
xhat_ens_1,
label='ens, scaled rmse=%.3f' % scaled_rmse_1)
ax.axvline(tt_test, label=r"$t_{transient}$")
ax.set(ylim=((-1, 1)), xlabel='time (s)', ylabel=r'$\mathbf{x}$')
plt.legend(loc='upper right')
plt.savefig("plots/oscillate_%s_test_1.pdf" % neuron_type)
print('scaled rmses: ', scaled_rmse_0, scaled_rmse_1)
mean = np.mean([scaled_rmse_0, scaled_rmse_1])
fig, ax = plt.subplots()
sns.barplot(data=np.array([mean]))
ax.set(ylabel='Scaled RMSE', title="mean=%.3f" % mean)
plt.xticks()
plt.savefig("plots/oscillate_%s_scaled_rmse.pdf" % neuron_type)
np.savez('data/oscillate_%s_results.npz' % neuron_type,
scaled_rmse_0=scaled_rmse_0,
scaled_rmse_1=scaled_rmse_1)
return mean
def run(NPre=100, N=100, t=10, nTrain=10, nTest=3, nEnc=10, dt=0.001, c=None,
fPre=DoubleExp(1e-3, 1e-1), fNMDA=DoubleExp(10.6e-3, 285e-3), fGABA=DoubleExp(0.5e-3, 1.5e-3), fS=DoubleExp(1e-3, 1e-1),
Tff=0.3, Tneg=-1, reg=1e-2, load=[], file=None, DATest=lambda t: 0):
if not c: c = t
if 0 in load:
dPreA = np.load(file)['dPreA']
dPreB = np.load(file)['dPreB']
dPreC = np.load(file)['dPreC']
else:
print('readout decoders for pre[A,B,C]')
spikesInptA = np.zeros((nTrain, int(t/dt), NPre))
spikesInptB = np.zeros((nTrain, int(t/dt), NPre))
spikesInptC = np.zeros((nTrain, int(t/dt), NPre))
targetsInptA = np.zeros((nTrain, int(t/dt), 1))
targetsInptB = np.zeros((nTrain, int(t/dt), 1))
targetsInptC = np.zeros((nTrain, int(t/dt), 1))
for n in range(nTrain):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(
NPre=NPre, N=N, t=t, dt=dt,
stimA=stimA, stimB=stimB, stimC=stimB,
stage=0)
spikesInptA[n] = data['preA']
spikesInptB[n] = data['preB']
spikesInptC[n] = data['preC']
targetsInptA[n] = fPre.filt(data['inptA'], dt=dt)
targetsInptB[n] = fPre.filt(data['inptB'], dt=dt)
targetsInptC[n] = fPre.filt(data['inptC'], dt=dt)
dPreA, XA, YA, errorA = decodeNoF(spikesInptA, targetsInptA, nTrain, fPre, dt=dt, reg=reg)
dPreB, XB, YB, errorB = decodeNoF(spikesInptB, targetsInptB, nTrain, fPre, dt=dt, reg=reg)
dPreC, XC, YC, errorC = decodeNoF(spikesInptC, targetsInptC, nTrain, fPre, dt=dt, reg=reg)
np.savez("data/integrateNMDA.npz",
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC)
times = np.arange(0, t*nTrain, dt)
plotState(times, XA, YA, errorA, "integrateNMDA", "preA", t*nTrain)
plotState(times, XB, YB, errorB, "integrateNMDA", "preB", t*nTrain)
plotState(times, XC, YC, errorC, "integrateNMDA", "preC", t*nTrain)
if 1 in load:
ePreA = np.load(file)['ePreA']
ePreB = np.load(file)['ePreB']
ePreC = np.load(file)['ePreC']
else:
print("encoders for pre[A,B,C] to [fdfw, ens, inh]")
ePreA = np.zeros((NPre, N, 1))
ePreB = np.zeros((NPre, N, 1))
ePreC = np.zeros((NPre, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(
NPre=NPre, N=N, t=t, dt=dt,
stimA=stimA, stimB=stimB, stimC=stimB,
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC,
ePreA=ePreA, ePreB=ePreB, ePreC=ePreC,
stage=1)
ePreA = data['ePreA']
ePreB = data['ePreB']
ePreC = data['ePreC']
plotActivity(t, dt, fS, data['times'], data['fdfw'], data['tarFdfw'], "integrateNMDA", "preAFdfw")
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'], "integrateNMDA", "preBEns")
plotActivity(t, dt, fS, data['times'], data['inh'], data['tarInh'], "integrateNMDA", "preCInh")
np.savez("data/integrateNMDA.npz",
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC,
ePreA=ePreA, ePreB=ePreB, ePreC=ePreC)
if 2 in load:
dFdfw = np.load(file)['dFdfw']
dInh = np.load(file)['dInh']
else:
print('readout decoders for fdfw and inh')
spikesFdfw = np.zeros((nTrain, int(t/dt), N))
spikesInh = np.zeros((nTrain, int(t/dt), N))
targetsFdfw = np.zeros((nTrain, int(t/dt), 1))
targetsInh = np.zeros((nTrain, int(t/dt), 1))
for n in range(nTrain):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
stimC = lambda x: 0.5+0.5*np.sin(2*np.pi*x/t)
data = go(
NPre=NPre, N=N, t=t, dt=dt,
stimA=stimA, stimB=stimB, stimC=stimC,
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC,
ePreA=ePreA, ePreB=ePreB, ePreC=ePreC,
stage=2)
spikesFdfw[n] = data['fdfw']
spikesInh[n] = data['inh']
targetsFdfw[n] = fNMDA.filt(Tff*fPre.filt(data['inptA'], dt=dt))
targetsInh[n] = fGABA.filt(fPre.filt(data['inptC'], dt=dt))
dFdfw, X1, Y1, error1 = decodeNoF(spikesFdfw, targetsFdfw, nTrain, fNMDA, dt=dt, reg=reg)
dInh, X2, Y2, error2 = decodeNoF(spikesInh, targetsInh, nTrain, fGABA, dt=dt, reg=reg)
np.savez("data/integrateNMDA.npz",
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC, dFdfw=dFdfw, dInh=dInh,
ePreA=ePreA, ePreB=ePreB, ePreC=ePreC)
times = np.arange(0, t*nTrain, dt)
plotState(times, X1, Y1, error1, "integrateNMDA", "fdfw", t*nTrain)
plotState(times, X2, Y2, error2, "integrateNMDA", "inh", t*nTrain)
if 3 in load:
eFdfw = np.load(file)['eFdfw']
else:
print("encoders for fdfw-to-ens")
eFdfw = np.zeros((N, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(
NPre=NPre, N=N, t=t, dt=dt,
stimA=stimA, stimB=stimB, Tff=Tff,
dPreA=dPreA, dPreB=dPreB, dFdfw=dFdfw,
ePreA=ePreA, ePreB=ePreB, eFdfw=eFdfw,
stage=3)
eFdfw = data['eFdfw']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'], "integrateNMDA", "fdfwEns")
np.savez("data/integrateNMDA.npz",
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC, dFdfw=dFdfw, dInh=dInh,
ePreA=ePreA, ePreB=ePreB, ePreC=ePreC, eFdfw=eFdfw)
if 4 in load:
dBio = np.load(file)['dBio']
dNeg = np.load(file)['dNeg']
# dNeg = -np.array(dBio)
else:
print('readout decoders for ens')
spikes = np.zeros((nTrain, int(t/dt), N))
targets = np.zeros((nTrain, int(t/dt), 1))
for n in range(nTrain):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(
NPre=NPre, N=N, t=t, dt=dt, stimA=stimA, stimB=stimB,
dPreA=dPreA, dPreB=dPreB, dFdfw=dFdfw,
ePreA=ePreA, ePreB=ePreB, eFdfw=eFdfw,
stage=4)
spikes[n] = data['ens']
targets[n] = fNMDA.filt(fPre.filt(data['inptB']))
# targets[n] = fNMDA.filt(
# fPre.filt(fNMDA.filt(data['inptB'])) +
# fNMDA.filt(Tff*fPre.filt(data['inptA'])))
dBio, X, Y, error = decodeNoF(spikes, targets, nTrain, fNMDA, dt=dt, reg=reg)
dNeg = -np.array(dBio)
np.savez("data/integrateNMDA.npz",
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC, dFdfw=dFdfw, dInh=dInh, dBio=dBio, dNeg=dNeg,
ePreA=ePreA, ePreB=ePreB, ePreC=ePreC, eFdfw=eFdfw)
times = np.arange(0, t*nTrain, dt)
plotState(times, X, Y, error, "integrateNMDA", "ens", t*nTrain)
if 5 in load:
eBio = np.load(file)['eBio']
else:
print("encoders from ens to ens")
eBio = np.zeros((N, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
data = go(
NPre=NPre, N=N, t=t, dt=dt, stimA=stimA, stimB=stimB,
dPreA=dPreA, dPreB=dPreB, dFdfw=dFdfw, dBio=dBio,
ePreA=ePreA, ePreB=ePreB, eFdfw=eFdfw, eBio=eBio,
stage=5)
eBio = data['eBio']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'], "integrateNMDA", "ensEns")
np.savez("data/integrateNMDA.npz",
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC, dFdfw=dFdfw, dBio=dBio, dInh=dInh, dNeg=dNeg,
ePreA=ePreA, ePreB=ePreB, ePreC=ePreC, eFdfw=eFdfw, eBio=eBio)
if 6 in load:
eNeg = np.load(file)['eNeg']
eInh = np.load(file)['eInh']
else:
print("encoders from [ens, inh] to fdfw")
eNeg = np.zeros((N, N, 1))
eInh = np.zeros((N, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=n)
stimC = lambda t: 0 if t<c else 1
data = go(
NPre=NPre, N=N, t=t, dt=dt, stimA=stimA, stimB=stimB, stimC=stimC,
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC, dFdfw=dFdfw, dBio=dBio, dNeg=dNeg, dInh=dInh,
ePreA=ePreA, ePreB=ePreB, ePreC=ePreC, eFdfw=eFdfw, eBio=eBio, eNeg=eNeg, eInh=eInh,
stage=6)
eNeg = data['eNeg']
eInh = data['eInh']
plotActivity(t, dt, fS, data['times'], data['fdfw2'], data['tarFdfw2'], "integrateNMDA", "ensFdfw")
plotActivity(t, dt, fS, data['times'], data['fdfw4'], data['tarFdfw4'], "integrateNMDA", "inhFdfw")
np.savez("data/integrateNMDA.npz",
dPreA=dPreA, dPreB=dPreB, dPreC=dPreC, dFdfw=dFdfw, dBio=dBio, dNeg=dNeg, dInh=dInh,
ePreA=ePreA, ePreB=ePreB, ePreC=ePreC, eFdfw=eFdfw, eBio=eBio, eNeg=eNeg, eInh=eInh)
# eNeg = None
# eInh = None
print("testing")
vals = np.linspace(-1, 1, nTest)
for test in range(nTest):
stimA = lambda t: vals[test] if t<c else 0
stimC = lambda t: 0 if t<c else 1
data = go(
NPre=NPre, N=N, t=t, dt=dt, stimA=stimA, stimC=stimC,
dPreA=dPreA, dPreC=dPreC, dFdfw=dFdfw, dBio=dBio, dNeg=Tneg*dNeg, dInh=dInh,
ePreA=ePreA, ePreC=ePreC, eFdfw=eFdfw, eBio=eBio, eNeg=eNeg, eInh=eInh,
stage=7, c=c, DA=DATest)
aFdfw = fNMDA.filt(data['fdfw'], dt=dt)
aBio = fNMDA.filt(data['ens'], dt=dt)
aInh = fGABA.filt(data['inh'], dt=dt)
xhatFdfw = np.dot(aFdfw, dFdfw)/Tff
xhatBio = np.dot(aBio, dBio)
xhatInh = np.dot(aInh, dInh)
xFdfw = fNMDA.filt(fNMDA.filt(fPre.filt(data['inptA'], dt=dt), dt=dt), dt=dt)
xBio = xFdfw[int(c/dt)] * np.ones_like(data['times'])
errorBio = rmse(xhatBio[int(c/dt):], xBio[int(c/dt):])
fig, ax = plt.subplots()
ax.plot(data['times'], xFdfw, alpha=0.5, label="input (filtered)")
ax.plot(data['times'], xhatFdfw, alpha=0.5, label="fdfw")
ax.plot(data['times'], xBio, label="target")
ax.plot(data['times'], xhatBio, alpha=0.5, label="ens, rmse=%.3f"%errorBio)
ax.plot(data['times'], xhatInh, alpha=0.5, label="inh")
ax.axvline(c, label="cutoff")
ax.set(xlabel='time', ylabel='state', xlim=((0, t)), ylim=((-1.5, 1.5)))
ax.legend(loc='upper left')
sns.despine()
fig.savefig("plots/integrateNMDA_testFlat%s.pdf"%test)
stimA, stimB = makeSignal(t, fPre, fNMDA, dt=dt, seed=200+test)
stimC = lambda t: 0
data = go(NPre=NPre, N=N, t=t, dt=dt, stimA=stimA, stimB=stimB, stimC=stimC, Tff=Tff,
dPreA=dPreA, dPreC=dPreC, dFdfw=dFdfw, dBio=dBio, dNeg=None, dInh=dInh,
ePreA=ePreA, ePreC=ePreC, eFdfw=eFdfw, eBio=eBio, eNeg=None, eInh=eInh,
stage=7, DA=DATest)
aFdfw = fNMDA.filt(data['fdfw'], dt=dt)
aBio = fNMDA.filt(data['ens'], dt=dt)
xhatFdfw = np.dot(aFdfw, dFdfw)
xhatBio = np.dot(aBio, dBio)
xhatNeg = np.dot(aBio, dNeg)
xFdfw = fNMDA.filt(fPre.filt(data['inptA'], dt=dt), dt=dt)
xBio = fNMDA.filt(fPre.filt(data['inptB'], dt=dt), dt=dt)
errorBio = rmse(xhatBio, xBio)
fig, ax = plt.subplots()
ax.plot(data['times'], xhatFdfw, alpha=0.5, label="fdfw")
ax.plot(data['times'], fNMDA.filt(Tff*xFdfw, dt=dt), alpha=0.5, label="input (filtered)")
ax.plot(data['times'], xBio, label="target")
ax.plot(data['times'], xhatBio, alpha=0.5, label="ens, rmse=%.3f"%errorBio)
ax.set(xlabel='time', ylabel='state', xlim=((0, t)), ylim=((-1.5, 1.5)))
ax.legend(loc='upper left')
sns.despine()
fig.savefig("plots/integrateNMDA_testWhite%s.pdf"%test)
plt.close('all')
def medium(N=300,
t=10,
dt=0.001,
nTrain=5,
nTest=5,
fAMPA=DoubleExp(0.55e-3, 2.2e-3),
fNMDA=DoubleExp(2.3e-3, 95.0e-3),
fGABA=DoubleExp(0.5e-3, 1.5e-3),
daAMPA=0.8,
daNMDA=0.7,
daGABA=0.8,
kEnsEnsAMPA=0.2,
kEnsEnsNMDA=0.85,
kEnsInhAMPA=0.1,
kEnsInhNMDA=1.0,
kGABAFdfw=-4.0,
kGABAEns=-1e-3,
T=0.05):
print("readout decoders for fdfw")
targetsAMPA = np.zeros((1, 1))
targetsNMDA = np.zeros((1, 1))
asAMPA = np.zeros((1, N))
asNMDA = np.zeros((1, N))
for n in range(nTrain):
stim = makeSignalEven(t, dt=dt, value=(n + 1) / nTrain)
# stim = makeSignalPos(t, fNMDA, dt=dt, seed=n)
data = goLIF(N=N,
stim=stim,
t=t,
dt=dt,
fAMPA=fAMPA,
fNMDA=fNMDA,
fGABA=fGABA)
asAMPA = np.append(asAMPA, fAMPA.filt(data['fdfw']), axis=0)
asNMDA = np.append(asNMDA, fNMDA.filt(data['fdfw']), axis=0)
targetsAMPA = np.append(targetsAMPA, fAMPA.filt(data['inpt']), axis=0)
targetsNMDA = np.append(targetsNMDA, fNMDA.filt(data['inpt']), axis=0)
# dFdfwEnsAMPA, _ = LstsqL2(reg=1e-1)(asAMPA, np.ravel(targetsAMPA))
# dFdfwEnsNMDA, _ = LstsqL2(reg=1e-1)(asNMDA, np.ravel(targetsNMDA))
dFdfwEnsAMPA, _ = nnls(asAMPA, np.ravel(targetsAMPA))
dFdfwEnsNMDA, _ = nnls(asNMDA, np.ravel(targetsNMDA))
dFdfwEnsAMPA = dFdfwEnsAMPA.reshape((N, 1))
dFdfwEnsNMDA = dFdfwEnsNMDA.reshape((N, 1))
xhatFFAMPA = np.dot(asAMPA, dFdfwEnsAMPA)
xhatFFNMDA = np.dot(asNMDA, dFdfwEnsNMDA)
fig, ax = plt.subplots()
ax.plot(targetsAMPA, linestyle="--", label='target (AMPA)')
ax.plot(targetsNMDA, linestyle="--", label='target (NMDA)')
ax.plot(xhatFFAMPA, alpha=0.5, label='fdfw (AMPA)')
ax.plot(xhatFFNMDA, alpha=0.5, label='fdfw (NMDA)')
ax.legend(loc="upper right")
ax.set(ylim=((0, 1)), xlabel="time (s)", ylabel=r"$\mathbf{\hat{x}}(t)$")
fig.savefig("plots/gatedMemory_goLIF_fdfw.pdf")
print(
"readout decoders for ens, given AMPA and NMDA from fdfw in high DA condition"
)
targetsAMPA = np.zeros((1, 1))
targetsNMDA = np.zeros((1, 1))
asAMPA = np.zeros((1, N))
asNMDA = np.zeros((1, N))
for n in range(nTrain):
stim = makeSignalEven(t, dt=dt, value=(n + 1) / nTrain)
# stim = makeSignalPos(t, fNMDA, dt=dt, seed=n)
data = goLIF(N=N,
stim=stim,
t=t,
dt=dt,
fAMPA=fAMPA,
fNMDA=fNMDA,
fGABA=fGABA,
dFdfwEnsAMPA=0 * dFdfwEnsAMPA,
dFdfwEnsNMDA=dFdfwEnsNMDA)
asAMPA = np.append(asAMPA, fAMPA.filt(data['ens']), axis=0)
asNMDA = np.append(asNMDA, fNMDA.filt(data['ens']), axis=0)
targetsAMPA = np.append(targetsAMPA,
fAMPA.filt(fNMDA.filt(data['inpt'])),
axis=0)
targetsNMDA = np.append(targetsNMDA,
fNMDA.filt(fNMDA.filt(data['inpt'])),
axis=0)
# dEnsEnsAMPA, _ = LstsqL2(reg=1e-1)(asAMPA, kAMPA*np.ravel(targetsAMPA))
# dEnsEnsNMDA, _ = LstsqL2(reg=1e-1)(asNMDA, kNMDA*np.ravel(targetsNMDA))
dEnsEnsAMPA, _ = nnls(asAMPA, kEnsEnsAMPA * np.ravel(targetsAMPA))
dEnsEnsNMDA, _ = nnls(asNMDA, kEnsEnsNMDA * np.ravel(targetsNMDA))
dEnsEnsAMPA = dEnsEnsAMPA.reshape((N, 1))
dEnsEnsNMDA = dEnsEnsNMDA.reshape((N, 1))
dEnsInhAMPA, _ = nnls(asAMPA, kEnsInhAMPA * np.ravel(targetsAMPA))
dEnsInhNMDA, _ = nnls(asNMDA, kEnsInhNMDA * np.ravel(targetsNMDA))
dEnsInhAMPA = dEnsInhAMPA.reshape((N, 1))
dEnsInhNMDA = dEnsInhNMDA.reshape((N, 1))
xhatFBAMPA = np.dot(asAMPA, dEnsEnsAMPA)
xhatFBNMDA = np.dot(asNMDA, dEnsEnsNMDA)
xhatConstAMPA = np.dot(asAMPA, dEnsInhAMPA)
xhatConstNMDA = np.dot(asNMDA, dEnsInhNMDA)
fig, ax = plt.subplots()
ax.plot(kEnsEnsAMPA * targetsAMPA, linestyle="--", label='target (AMPA)')
ax.plot(kEnsEnsNMDA * targetsNMDA, linestyle="--", label='target (NMDA)')
ax.plot(xhatFBAMPA, alpha=0.5, label='ens (AMPA)')
ax.plot(xhatFBNMDA, alpha=0.5, label='ens (NMDA)')
ax.legend(loc="upper right")
ax.set(ylim=((0, 1)), xlabel="time (s)", ylabel=r"$\mathbf{\hat{x}}(t)$")
fig.savefig("plots/gatedMemory_goLIF_ens.pdf")
print(
"readout decoders for inh, given ff and fb AMPA and NMDA and high DA")
targetsGABA = np.zeros((1, 1))
asGABA = np.zeros((1, N))
for n in range(nTrain):
stim = makeSignalEven(t, dt=dt, value=(n + 1) / nTrain)
# stim = makeSignalPos(t, fNMDA, dt=dt, seed=n)
data = goLIF(N=N,
stim=stim,
t=t,
dt=dt,
fAMPA=fAMPA,
fNMDA=fNMDA,
fGABA=fGABA,
dFdfwEnsAMPA=daAMPA * dFdfwEnsAMPA,
dFdfwEnsNMDA=dFdfwEnsNMDA,
dEnsInhAMPA=daAMPA * dEnsInhAMPA,
dEnsInhNMDA=dEnsInhNMDA)
asGABA = np.append(asGABA, fGABA.filt(data['inh']), axis=0)
targetsGABA = np.append(targetsGABA,
fGABA.filt(fNMDA.filt(data['inpt'])),
axis=0)
dInhEnsGABA, _ = nnls(-asGABA, kGABAEns * np.ravel(targetsGABA))
dInhFdfwGABA, _ = nnls(-asGABA, kGABAFdfw * np.ravel(targetsGABA))
dInhEnsGABA = -dInhEnsGABA.reshape((N, 1))
dInhFdfwGABA = -dInhFdfwGABA.reshape((N, 1))
xhatInhEns = np.dot(asGABA, dInhEnsGABA)
xhatInhFdfw = np.dot(asGABA, dInhFdfwGABA)
fig, ax = plt.subplots()
ax.plot(kGABAEns * targetsGABA, linestyle="--", label='target (ens)')
ax.plot(kGABAFdfw * targetsGABA, linestyle="--", label='target (fdfw)')
ax.plot(xhatInhEns, alpha=0.5, label='inh (ens)')
ax.plot(xhatInhFdfw, alpha=0.5, label='inh (fdfw)')
ax.legend(loc="upper right")
ax.set(ylim=((-1, 0)), xlabel="time (s)", ylabel=r"$\mathbf{\hat{x}}(t)$")
fig.savefig("plots/gatedMemory_goLIF_inh.pdf")
# Test in high and low DA
print('testing with high and low DA')
for n in range(nTest):
stim = makeSignalSquare(t, dt=dt, seed=100 + n)
# data = goLIF(N=N, stim=lambda t: 0, x0=n/nTest, t=t, dt=dt,
data = goLIF(N=N,
stim=stim,
t=t,
dt=dt,
fAMPA=fAMPA,
fNMDA=fNMDA,
fGABA=fGABA,
dFdfwEnsAMPA=daAMPA * T * dFdfwEnsAMPA,
dFdfwEnsNMDA=T * dFdfwEnsNMDA,
dEnsEnsAMPA=daAMPA * dEnsEnsAMPA,
dEnsEnsNMDA=dEnsEnsNMDA,
dEnsInhAMPA=daAMPA * dEnsInhAMPA,
dEnsInhNMDA=dEnsInhNMDA,
dInhEnsGABA=dInhEnsGABA,
dInhFdfwGABA=dInhFdfwGABA)
aFdfwNMDA = fNMDA.filt(data['fdfw'])
targetFdfwNMDA = fNMDA.filt(data['inpt'])
xhatFdfwNMDA = np.dot(aFdfwNMDA, dFdfwEnsNMDA)
aEnsNMDA = fNMDA.filt(data['ens'])
targetIntgNMDA = fNMDA.filt(data['intg'])
# targetFlatNMDA = n/nTest*np.ones((aEnsNMDA.shape[0]))
xhatIntgNMDA = np.dot(aEnsNMDA, dEnsEnsNMDA)
fig, (ax, ax2) = plt.subplots(ncols=1, nrows=2, sharex=True)
ax.plot(data['times'],
targetFdfwNMDA,
linestyle="--",
label='input (NMDA)')
ax.plot(data['times'], xhatFdfwNMDA, alpha=0.5, label='fdfw (NMDA)')
ax.plot(data['times'],
targetIntgNMDA,
linestyle="--",
label='integral (NMDA)')
# ax.plot(data['times'], targetFlatNMDA, linestyle="--", label='flat (NMDA)')
ax.plot(data['times'], xhatIntgNMDA, alpha=0.5, label='ens (NMDA)')
ax.legend(loc="upper right")
ax.set(ylim=((0, 1)), ylabel=r"$\mathbf{\hat{x}}(t)$", title="high DA")
stim = makeSignalSquare(t, dt=dt, seed=100 + n)
data = goLIF(N=N,
stim=stim,
t=t,
dt=dt,
fAMPA=fAMPA,
fNMDA=fNMDA,
fGABA=fGABA,
dFdfwEnsAMPA=T * dFdfwEnsAMPA,
dFdfwEnsNMDA=daNMDA * T * dFdfwEnsNMDA,
dEnsEnsAMPA=dEnsEnsAMPA,
dEnsEnsNMDA=daNMDA * dEnsEnsNMDA,
dEnsInhAMPA=dEnsInhAMPA,
dEnsInhNMDA=daNMDA * dEnsInhNMDA,
dInhEnsGABA=daGABA * dInhEnsGABA,
dInhFdfwGABA=daGABA * dInhFdfwGABA)
aFdfwNMDA = fNMDA.filt(data['fdfw'])
targetFdfwNMDA = fNMDA.filt(data['inpt'])
xhatFdfwNMDA = np.dot(aFdfwNMDA, dFdfwEnsNMDA)
aEnsNMDA = fNMDA.filt(data['ens'])
targetIntgNMDA = fNMDA.filt(data['intg'])
# targetFlatNMDA = n/nTest*np.ones((aEnsNMDA.shape[0]))
xhatIntgNMDA = np.dot(aEnsNMDA, dEnsEnsNMDA)
# fig, ax = plt.subplots()
ax2.plot(data['times'],
targetFdfwNMDA,
linestyle="--",
label='input (NMDA)')
ax2.plot(data['times'], xhatFdfwNMDA, alpha=0.5, label='fdfw (NMDA)')
ax2.plot(data['times'],
targetIntgNMDA,
linestyle="--",
label='integral (NMDA)')
# ax2.plot(data['times'], targetFlatNMDA, linestyle="--", label='flat (NMDA)')
ax2.plot(data['times'], xhatIntgNMDA, alpha=0.5, label='ens (NMDA)')
ax2.legend(loc="upper right")
ax2.set(ylim=((0, 1)),
xlabel="time (s)",
ylabel=r"$\mathbf{\hat{x}}(t)$",
title="low DA")
fig.savefig("plots/gatedMemory_goLIF_test%s.pdf" % n)
def go(NPre=100, N=100, t=10, c=None, seed=0, dt=0.001, Tff=0.3, tTrans=0.01,
stage=None, alpha=3e-7, eMax=1e-1,
fPre=DoubleExp(1e-3, 1e-1), fNMDA=DoubleExp(10.6e-3, 285e-3), fS=DoubleExp(1e-3, 1e-1),
dPreA=None, dPreB=None, dPreC=None, dFdfw=None, dBio=None, dNeg=None, dInh=None,
ePreA=None, ePreB=None, ePreC=None, eFdfw=None, eBio=None, eNeg=None, eInh=None,
stimA=lambda t: 0, stimB=lambda t: 0, stimC=lambda t: 0, DA=lambda t: 0):
if not c: c = t
with nengo.Network(seed=seed) as model:
inptA = nengo.Node(stimA)
inptB = nengo.Node(stimB)
inptC = nengo.Node(stimC)
preA = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
preB = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
preC = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
fdfw = nengo.Ensemble(N, 1, neuron_type=Bio("Pyramidal", DA=DA), seed=seed)
ens = nengo.Ensemble(N, 1, neuron_type=Bio("Pyramidal", DA=DA), seed=seed+1)
inh = nengo.Ensemble(N, 1, neuron_type=Bio("Interneuron", DA=DA), seed=seed+2)
tarFdfw = nengo.Ensemble(N, 1, max_rates=Uniform(30, 30), intercepts=Uniform(-0.8, 0.8), neuron_type=nengo.LIF(), seed=seed)
tarEns = nengo.Ensemble(N, 1, max_rates=Uniform(30, 30), intercepts=Uniform(-0.8, 0.8), neuron_type=nengo.LIF(), seed=seed+1)
tarInh = nengo.Ensemble(N, 1, max_rates=Uniform(30, 30), intercepts=Uniform(0.2, 0.8), encoders=Choice([[1]]), neuron_type=nengo.LIF(), seed=seed+2)
cA = nengo.Connection(inptA, preA, synapse=None, seed=seed)
cB = nengo.Connection(inptB, preB, synapse=None, seed=seed)
cC = nengo.Connection(inptC, preC, synapse=None, seed=seed)
pInptA = nengo.Probe(inptA, synapse=None)
pInptB = nengo.Probe(inptB, synapse=None)
pInptC = nengo.Probe(inptC, synapse=None)
pPreA = nengo.Probe(preA.neurons, synapse=None)
pPreB = nengo.Probe(preB.neurons, synapse=None)
pPreC = nengo.Probe(preC.neurons, synapse=None)
pFdfw = nengo.Probe(fdfw.neurons, synapse=None)
pTarFdfw = nengo.Probe(tarFdfw.neurons, synapse=None)
pEns = nengo.Probe(ens.neurons, synapse=None)
pTarEns = nengo.Probe(tarEns.neurons, synapse=None)
pInh = nengo.Probe(inh.neurons, synapse=None)
pTarInh = nengo.Probe(tarInh.neurons, synapse=None)
if stage==1:
nengo.Connection(inptA, tarFdfw, synapse=fPre, seed=seed)
nengo.Connection(inptB, tarEns, synapse=fPre, seed=seed)
nengo.Connection(inptC, tarInh, synapse=fPre, seed=seed)
c1 = nengo.Connection(preA, fdfw, synapse=fPre, solver=NoSolver(dPreA), seed=seed)
c2 = nengo.Connection(preB, ens, synapse=fPre, solver=NoSolver(dPreB), seed=seed)
c3 = nengo.Connection(preC, inh, synapse=fPre, solver=NoSolver(dPreC), seed=seed)
learnEncoders(c1, tarFdfw, fS, alpha=alpha, eMax=eMax, tTrans=tTrans)
learnEncoders(c2, tarEns, fS, alpha=3*alpha, eMax=10*eMax, tTrans=tTrans)
learnEncoders(c3, tarInh, fS, alpha=alpha/3, eMax=eMax, tTrans=tTrans)
if stage==2:
c1 = nengo.Connection(preA, fdfw, synapse=fPre, solver=NoSolver(dPreA), seed=seed)
c2 = nengo.Connection(preC, inh, synapse=fPre, solver=NoSolver(dPreC), seed=seed)
if stage==3:
cB.synapse = fNMDA
nengo.Connection(inptA, tarFdfw, synapse=fPre, seed=seed)
nengo.Connection(inptB, tarEns, synapse=fPre, seed=seed)
nengo.Connection(tarFdfw, tarEns, synapse=fNMDA, transform=Tff, seed=seed)
c1 = nengo.Connection(preA, fdfw, synapse=fPre, solver=NoSolver(dPreA), seed=seed)
c2 = nengo.Connection(preB, ens, synapse=fPre, solver=NoSolver(dPreB), seed=seed)
c3 = nengo.Connection(fdfw, ens, synapse=NMDA(), solver=NoSolver(dFdfw), seed=seed)
learnEncoders(c3, tarEns, fS, alpha=alpha, eMax=eMax, tTrans=tTrans)
if stage==4:
cB.synapse = fNMDA
c1 = nengo.Connection(preA, fdfw, synapse=fPre, solver=NoSolver(dPreA), seed=seed)
c2 = nengo.Connection(preB, ens, synapse=fPre, solver=NoSolver(dPreB), seed=seed)
c3 = nengo.Connection(fdfw, ens, synapse=NMDA(), solver=NoSolver(dFdfw), seed=seed)
if stage==5:
preB2 = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
ens2 = nengo.Ensemble(N, 1, neuron_type=Bio("Pyramidal", DA=DA), seed=seed+1)
ens3 = nengo.Ensemble(N, 1, neuron_type=Bio("Pyramidal", DA=DA), seed=seed+1)
nengo.Connection(inptB, preB2, synapse=fNMDA, seed=seed)
c1 = nengo.Connection(preA, fdfw, synapse=fPre, solver=NoSolver(dPreA), seed=seed)
c2 = nengo.Connection(fdfw, ens, synapse=NMDA(), solver=NoSolver(dFdfw), seed=seed)
c3 = nengo.Connection(preB, ens2, synapse=fPre, solver=NoSolver(dPreB), seed=seed)
c4 = nengo.Connection(ens2, ens, synapse=NMDA(), solver=NoSolver(dBio), seed=seed)
c5 = nengo.Connection(fdfw, ens3, synapse=NMDA(), solver=NoSolver(dFdfw), seed=seed)
c6 = nengo.Connection(preB2, ens3, synapse=fPre, solver=NoSolver(dPreB), seed=seed)
learnEncoders(c4, ens3, fS, alpha=alpha, eMax=eMax, tTrans=tTrans)
pTarEns = nengo.Probe(ens3.neurons, synapse=None)
if stage==6:
preA2 = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
fdfw2 = nengo.Ensemble(N, 1, neuron_type=Bio("Pyramidal", DA=DA), seed=seed)
fdfw3 = nengo.Ensemble(N, 1, neuron_type=Bio("Pyramidal", DA=DA), seed=seed)
fdfw4 = nengo.Ensemble(N, 1, neuron_type=Bio("Pyramidal", DA=DA), seed=seed)
tarFdfw4 = nengo.Ensemble(N, 1, max_rates=Uniform(30, 30), intercepts=Uniform(-0.8, 0.8), neuron_type=nengo.LIF(), seed=seed)
nengo.Connection(inptA, tarFdfw4, synapse=fPre, seed=seed)
nengo.Connection(inptB, preA2, synapse=fNMDA, seed=seed)
nengo.Connection(inptC, tarInh, synapse=fPre, seed=seed)
nengo.Connection(tarInh, tarFdfw4.neurons, synapse=None, transform=-1e2*np.ones((N, 1)), seed=seed)
c1 = nengo.Connection(preB, ens, synapse=fPre, solver=NoSolver(dPreB), seed=seed)
c2 = nengo.Connection(ens, fdfw2, synapse=NMDA(), solver=NoSolver(dNeg), seed=seed)
c3 = nengo.Connection(preA2, fdfw3, synapse=fPre, solver=NoSolver(dPreA), seed=seed)
c4 = nengo.Connection(preA, fdfw4, synapse=fPre, solver=NoSolver(dPreA), seed=seed)
c5 = nengo.Connection(preC, inh, synapse=fPre, solver=NoSolver(dPreC), seed=seed)
c6 = nengo.Connection(inh, fdfw4, synapse=GABA(), solver=NoSolver(dInh), seed=seed)
learnEncoders(c2, fdfw3, fS, alpha=alpha, eMax=eMax, tTrans=tTrans)
learnEncoders(c6, tarFdfw4, fS, alpha=1e3*alpha, eMax=1e3*eMax, tTrans=tTrans, inh=True)
pFdfw2 = nengo.Probe(fdfw2.neurons, synapse=None)
pFdfw4 = nengo.Probe(fdfw4.neurons, synapse=None)
pTarFdfw2 = nengo.Probe(fdfw3.neurons, synapse=None)
pTarFdfw4 = nengo.Probe(tarFdfw4.neurons, synapse=None)
if stage==7:
c1 = nengo.Connection(preA, fdfw, synapse=fPre, solver=NoSolver(dPreA), seed=seed)
c2 = nengo.Connection(fdfw, ens, synapse=NMDA(), solver=NoSolver(dFdfw), seed=seed)
c3 = nengo.Connection(ens, ens, synapse=NMDA(), solver=NoSolver(dBio), seed=seed)
c4 = nengo.Connection(ens, fdfw, synapse=NMDA(), solver=NoSolver(dNeg), seed=seed)
c5 = nengo.Connection(preC, inh, synapse=fPre, solver=NoSolver(dPreC), seed=seed)
c6 = nengo.Connection(inh, fdfw, synapse=GABA(), solver=NoSolver(dInh), seed=seed)
with nengo.Simulator(model, seed=seed, dt=dt, progress_bar=False) as sim:
if stage==1:
setWeights(c1, dPreA, ePreA)
setWeights(c2, dPreB, ePreB)
setWeights(c3, dPreC, ePreC)
if stage==2:
setWeights(c1, dPreA, ePreA)
setWeights(c2, dPreC, ePreC)
if stage==3:
setWeights(c1, dPreA, ePreA)
setWeights(c2, dPreB, ePreB)
setWeights(c3, dFdfw, eFdfw)
if stage==4:
setWeights(c1, dPreA, ePreA)
setWeights(c2, dPreB, ePreB)
setWeights(c3, dFdfw, eFdfw)
if stage==5:
setWeights(c1, dPreA, ePreA)
setWeights(c2, dFdfw, eFdfw)
setWeights(c3, dPreB, ePreB)
setWeights(c4, dBio, eBio)
setWeights(c5, dFdfw, eFdfw)
setWeights(c6, dPreB, ePreB)
if stage==6:
setWeights(c1, dPreB, ePreB)
setWeights(c2, dNeg, eNeg)
setWeights(c3, dPreA, ePreA)
setWeights(c4, dPreA, ePreA)
setWeights(c5, dPreC, ePreC)
setWeights(c6, dInh, eInh)
if stage==7:
setWeights(c1, dPreA, ePreA)
setWeights(c2, dFdfw, eFdfw)
setWeights(c3, dBio, eBio)
setWeights(c4, dNeg, eNeg)
setWeights(c5, dPreC, ePreC)
setWeights(c6, dInh, eInh)
neuron.h.init()
sim.run(t, progress_bar=True)
reset_neuron(sim, model)
ePreA = c1.e if stage==1 else ePreA
ePreB = c2.e if stage==1 else ePreB
ePreC = c3.e if stage==1 else ePreC
eFdfw = c3.e if stage==3 else eFdfw
eBio = c4.e if stage==5 else eBio
eNeg = c2.e if stage==6 else eNeg
eInh = c6.e if stage==6 else eInh
return dict(
times=sim.trange(),
inptA=sim.data[pInptA],
inptB=sim.data[pInptB],
inptC=sim.data[pInptC],
preA=sim.data[pPreA],
preB=sim.data[pPreB],
preC=sim.data[pPreC],
fdfw=sim.data[pFdfw],
ens=sim.data[pEns],
inh=sim.data[pInh],
tarFdfw=sim.data[pTarFdfw],
tarEns=sim.data[pTarEns],
tarInh=sim.data[pTarInh],
fdfw2=sim.data[pFdfw2] if stage==6 else None,
fdfw4=sim.data[pFdfw4] if stage==6 else None,
tarFdfw2=sim.data[pTarFdfw2] if stage==6 else None,
tarFdfw4=sim.data[pTarFdfw4] if stage==6 else None,
ePreA=ePreA,
ePreB=ePreB,
ePreC=ePreC,
eFdfw=eFdfw,
eBio=eBio,
eNeg=eNeg,
eInh=eInh,
)
def go(NPre=100,
N=100,
N2=30,
t=10,
m=Uniform(30, 30),
i=Uniform(-0.8, 0.8),
seed=0,
dt=0.001,
f=DoubleExp(1e-3, 1e-1),
fS=DoubleExp(1e-3, 1e-1),
neuron_type=LIF(),
d1=None,
d2=None,
f1=None,
f2=None,
e1=None,
e2=None,
l1=False,
l2=False,
stim=lambda t: [0, 0]):
if not f1: f1 = f
if not f2: f2 = f
if not np.any(d2): d2 = np.zeros((N, 1))
with nengo.Network(seed=seed) as model:
# Stimulus and Nodes
inpt = nengo.Node(stim)
tar = nengo.Ensemble(1, 2, neuron_type=nengo.Direct())
tar2 = nengo.Ensemble(1, 1, neuron_type=nengo.Direct())
pre = nengo.Ensemble(NPre,
2,
radius=2,
max_rates=m,
seed=seed,
neuron_type=LIF())
ens = nengo.Ensemble(N,
2,
radius=2,
max_rates=m,
intercepts=i,
neuron_type=neuron_type,
seed=seed)
ens2 = nengo.Ensemble(N2,
1,
max_rates=m,
intercepts=i,
neuron_type=neuron_type,
seed=seed + 1)
nengo.Connection(inpt, pre, synapse=None, seed=seed)
nengo.Connection(inpt, tar, synapse=f, seed=seed)
nengo.Connection(tar,
tar2,
synapse=f,
function=multiply,
seed=seed + 1)
c1 = nengo.Connection(pre,
ens,
synapse=f1,
seed=seed,
solver=NoSolver(d1))
if isinstance(neuron_type, Bio):
c2 = nengo.Connection(ens,
ens2,
synapse=f2,
seed=seed + 1,
function=multiply)
else:
c2 = nengo.Connection(ens.neurons,
ens2,
synapse=f2,
seed=seed + 1,
transform=d2.T)
pInpt = nengo.Probe(inpt, synapse=None)
pPre = nengo.Probe(pre.neurons, synapse=None)
pEns = nengo.Probe(ens.neurons, synapse=None)
pEns2 = nengo.Probe(ens2.neurons, synapse=None)
pTar = nengo.Probe(tar, synapse=None)
pTar2 = nengo.Probe(tar2, synapse=None)
# Encoder Learning (Bio)
if l1:
tarEns = nengo.Ensemble(N,
2,
radius=2,
max_rates=m,
intercepts=i,
neuron_type=nengo.LIF(),
seed=seed)
nengo.Connection(tar, tarEns, synapse=None, seed=seed)
learnEncoders(c1, tarEns, fS, alpha=3e-8)
pTarEns = nengo.Probe(tarEns.neurons, synapse=None)
if l2:
tarEns2 = nengo.Ensemble(N2,
1,
max_rates=m,
intercepts=i,
neuron_type=nengo.LIF(),
seed=seed + 1)
nengo.Connection(tar2, tarEns2, synapse=None)
# nengo.Connection(ens.neurons, tarEns2, synapse=f2, transform=d2.T, seed=seed+1)
learnEncoders(c2, tarEns2, fS, alpha=1e-7)
pTarEns2 = nengo.Probe(tarEns2.neurons, synapse=None)
pTarState = nengo.Probe(tarEns2, synapse=f)
with nengo.Simulator(model, seed=seed, dt=dt, progress_bar=False) as sim:
if isinstance(neuron_type, Bio):
setWeights(c1, d1, e1)
setWeights(c2, d2, e2)
neuron.h.init()
sim.run(t, progress_bar=True)
reset_neuron(sim, model)
else:
sim.run(t, progress_bar=True)
e1 = c1.e if l1 else e1
e2 = c2.e if l2 else e2
return dict(
times=sim.trange(),
inpt=sim.data[pInpt],
pre=sim.data[pPre],
ens=sim.data[pEns],
ens2=sim.data[pEns2],
tar=sim.data[pTar],
tar2=sim.data[pTar2],
tarEns=sim.data[pTarEns] if l1 else None,
tarEns2=sim.data[pTarEns2] if l2 else None,
tarState=sim.data[pTarState] if l2 else None,
e1=e1,
e2=e2,
)
def run(N=3000, neuron_type=LIF(), tTrain=200, tTest=100, tTransTrain=20, tTransTest=20,
nTrain=1, nTest=10, dt=0.001, dtSampleTrain=0.003, dtSampleTest=0.01, seed=0,
f2=10, reg=1e-3, reg2=1e-3, evals=100, r=30, load=False, file=None,
tauRiseMin=3e-2, tauRiseMax=6e-2, tauFallMin=2e-1, tauFallMax=3e-1):
print('\nNeuron Type: %s'%neuron_type)
rng = np.random.RandomState(seed=seed)
timeStepsTrain = int((tTrain-tTransTrain)/dtSampleTrain)
tStart = int(tTransTrain/dtSampleTrain)
tFlat = int((tTrain-tTransTrain)/dtSampleTrain)*nTrain
if load:
d = np.load(file)['d']
d2 = np.load(file)['d2']
tauRise = np.load(file)['tauRise']
tauFall = np.load(file)['tauFall']
f = DoubleExp(tauRise, tauFall)
else:
print('decoders for ens')
spikes = np.zeros((nTrain, timeStepsTrain, N))
spikes2 = np.zeros((nTrain, timeStepsTrain, N))
targets = np.zeros((nTrain, timeStepsTrain, 3))
targets2 = np.zeros((nTrain, timeStepsTrain, 3))
for n in range(nTrain):
# IC = np.array([rng.uniform(-15, 15), rng.uniform(-20, 20), rng.uniform(10, 35)])
IC = np.array([rng.uniform(-5, 5), rng.uniform(-5, 5), rng.uniform(20, 25)])
data = go(N=N, neuron_type=neuron_type, l=True, t=tTrain, r=r, dt=dt, dtSample=dtSampleTrain, seed=seed, IC=IC)
spikes[n] = data['ens'][-timeStepsTrain:]
spikes2[n] = gaussian_filter1d(data['ens'], sigma=f2, axis=0)[-timeStepsTrain:]
targets[n] = data['tar'][-timeStepsTrain:]
targets2[n] = gaussian_filter1d(data['tar'], sigma=f2, axis=0)[-timeStepsTrain:]
d, f, tauRise, tauFall, X, Y, error = decode(
spikes, targets, nTrain, dt=dtSampleTrain, dtSample=dtSampleTrain, name="lorenzNew", evals=evals, reg=reg,
tauRiseMin=tauRiseMin, tauRiseMax=tauRiseMax, tauFallMin=tauFallMin, tauFallMax=tauFallMax)
spikes2 = spikes2.reshape((tFlat, N))
targets2 = targets2.reshape((tFlat, 3))
A2 = gaussian_filter1d(spikes2, sigma=f2, axis=0)[-timeStepsTrain:]
Y2 = gaussian_filter1d(targets2, sigma=f2, axis=0)[-timeStepsTrain:]
d2, _ = nengo.solvers.LstsqL2(reg=reg2)(spikes2, targets2)
np.savez("data/lorenzNew_%s.npz"%neuron_type, d=d, d2=d2, tauRise=tauRise, tauFall=tauFall, f2=f2)
X2 = np.dot(A2, d2)[-timeStepsTrain:]
error = plotLorenz(X, X2, Y2, neuron_type, "train")
print("testing")
tStart = int(tTransTest/dtSampleTest)
errors = np.zeros((nTest))
rng = np.random.RandomState(seed=100+seed)
for test in range(nTest):
# IC = np.array([rng.uniform(-15, 15), rng.uniform(-20, 20), rng.uniform(10, 35)])
IC = np.array([rng.uniform(-5, 5), rng.uniform(-5, 5), rng.uniform(20, 25)])
data = go(d=d, f=f, N=N, neuron_type=neuron_type, t=tTest, r=r, dt=dt, dtSample=dtSampleTest, seed=seed, IC=IC)
A = f.filt(data['ens'], dt=dtSampleTest)
A2 = gaussian_filter1d(data['ens'], sigma=f2, axis=0)[tStart:]
X = np.dot(A, d)[tStart:]
X2 = np.dot(A2, d2)[tStart:]
Y = data['tar'][tStart:]
Y2 = gaussian_filter1d(data['tar'], sigma=f2, axis=0)[tStart:]
error = plotLorenz(X, X2, Y2, neuron_type, test)
errors[test] = error
_ = plotLorenz(Y, Y2, Y2, 'target', '')
print('errors: ', errors)
np.savez("data/lorenzNew_%s.npz"%neuron_type, d=d, d2=d2, tauRise=tauRise, tauFall=tauFall, f2=f2, errors=errors)
return errors
def run(NPre=300, N=100, t=20, tTrans=2, nTrain=1, nEnc=10, nTest=10, neuron_type=LIF(),
dt=0.001, f=DoubleExp(1e-3, 1e-1), fS=DoubleExp(1e-3, 1e-1), freq=1, muFreq=1.0, sigmaFreq=0.1, reg=1e-1, tauRiseMax=5e-2, tDrive=0.2, base=False, load=False, file=None):
print('\nNeuron Type: %s'%neuron_type)
rng = np.random.RandomState(seed=0)
if load:
d1 = np.load(file)['d1']
tauRise1 = np.load(file)['tauRise1']
tauFall1 = np.load(file)['tauFall1']
f1 = DoubleExp(tauRise1, tauFall1)
else:
print('readout decoders for pre')
spikes = np.zeros((nTrain, int(t/0.001), NPre))
targets = np.zeros((nTrain, int(t/0.001), 2))
for n in range(nTrain):
data = go(NPre=NPre, N=N, t=t, dt=0.001, f=f, fS=fS, neuron_type=LIF(), freq=freq, phase=2*np.pi*(n/nTrain))
spikes[n] = data['pre']
targets[n] = f.filt(data['inpt'], dt=0.001)
d1, f1, tauRise1, tauFall1, X, Y, error = decode(spikes, targets, nTrain, dt=0.001, tauRiseMax=tauRiseMax, name="oscillateNew")
np.savez("data/oscillateNew_%s.npz"%neuron_type, d1=d1, tauRise1=tauRise1, tauFall1=tauFall1)
times = np.arange(0, t*nTrain, 0.001)
plotState(times, X, Y, error, "oscillateNew", "%s_pre"%neuron_type, t*nTrain)
if load:
e1 = np.load(file)['e1']
elif isinstance(neuron_type, Bio):
print("ens1 encoders")
e1 = np.zeros((NPre, N, 2))
for n in range(nEnc):
data = go(d1=d1, e1=e1, f1=f1, NPre=NPre, N=N, t=t, dt=dt, f=f, fS=fS, neuron_type=neuron_type, freq=freq, phase=2*np.pi*(n/nEnc), l1=True)
e1 = data['e1']
np.savez("data/oscillateNew_%s.npz"%neuron_type, d1=d1, tauRise1=tauRise1, tauFall1=tauFall1, e1=e1)
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'], "oscillateNew", "ens")
else:
e1 = np.zeros((NPre, N, 2))
if load:
d2 = np.load(file)['d2']
tauRise2 = np.load(file)['tauRise2']
tauFall2 = np.load(file)['tauFall2']
f2 = DoubleExp(tauRise2, tauFall2)
else:
print('readout decoders for ens')
spikes = np.zeros((nTrain, int((t-tTrans)/dt), N))
targets = np.zeros((nTrain, int((t-tTrans)/dt), 2))
for n in range(nTrain):
data = go(d1=d1, e1=e1, f1=f1, NPre=NPre, N=N, t=t, dt=dt, f=f, fS=fS, neuron_type=neuron_type, freq=freq, phase=2*np.pi*(n/nTrain))
spikes[n] = data['ens'][int(tTrans/dt):]
targets[n] = f.filt(f.filt(data['tar'], dt=dt), dt=dt)[int(tTrans/dt):]
d2, f2, tauRise2, tauFall2, X, Y, error = decode(spikes, targets, nTrain, dt=dt, name="oscillateNew", reg=reg, tauRiseMax=tauRiseMax)
np.savez("data/oscillateNew_%s.npz"%neuron_type, d1=d1, tauRise1=tauRise1, tauFall1=tauFall1, e1=e1, d2=d2, tauRise2=tauRise2, tauFall2=tauFall2)
times = np.arange(0, t*nTrain, dt)[:len(X)]
plotState(times, X, Y, error, "oscillateNew", "%s_ens"%neuron_type, (t-tTrans)*nTrain)
if load:
e2 = np.load(file)['e2']
#elif isinstance(neuron_type, Bio):
print("ens2 encoders")
#e2 = np.zeros((N, N, 2))
for n in range(nEnc):
data = go(d1=d1, e1=e1, f1=f1, d2=d2, e2=e2, NPre=NPre, N=N, t=t, dt=dt, f=f, fS=fS, neuron_type=neuron_type, freq=freq, phase=2*np.pi*(n/nEnc), l2=True)
e2 = data['e2']
np.savez("data/oscillateNew_%s.npz"%neuron_type, d1=d1, tauRise1=tauRise1, tauFall1=tauFall1, e1=e1, d2=d2, tauRise2=tauRise2, tauFall2=tauFall2, e2=e2)
plotActivity(t, dt, fS, data['times'], data['ens2'], data['tarEns2'], "oscillateNew", "ens2")
else:
e2 = np.zeros((N, N, 2))
np.savez("data/oscillateNew_%s.npz"%neuron_type, d1=d1, tauRise1=tauRise1, tauFall1=tauFall1, e1=e1, d2=d2, tauRise2=tauRise2, tauFall2=tauFall2, e2=e2)
print("testing")
errors = np.zeros((nTest))
for test in range(nTest):
data = go(d1=d1, e1=e1, f1=f1, d2=d2, e2=e2, f2=f2, NPre=NPre, N=N, t=t+tTrans, dt=dt, f=f, fS=fS, neuron_type=neuron_type, freq=freq, phase=2*np.pi*(test/nTest), tDrive=tDrive, test=True)
# curve fit to a sinusoid of arbitrary frequency, phase, magnitude
times = data['times']
A = f2.filt(data['ens'], dt=dt)
X = np.dot(A, d2)
freq0, phase0, mag0, base0 = fitSinusoid(times, X[:,0], freq, int(tTrans/dt), muFreq=muFreq, sigmaFreq=sigmaFreq, base=base)
freq1, phase1, mag1, base1 = fitSinusoid(times, X[:,1], freq, int(tTrans/dt), muFreq=muFreq, sigmaFreq=sigmaFreq, base=base)
s0 = base0+mag0*np.sin(times*2*np.pi*freq0+phase0)
s1 = base1+mag1*np.sin(times*2*np.pi*freq1+phase1)
# freqError0 = np.abs(freq-freq0)
# freqError1 = np.abs(freq-freq1)
rmseError0 = rmse(X[int(tTrans/dt):,0], s0[int(tTrans/dt):])
rmseError1 = rmse(X[int(tTrans/dt):,1], s1[int(tTrans/dt):])
# error0 = (1+freqError0) * rmseError0
# error1 = (1+freqError1) * rmseError1
error0 = rmseError0
error1 = rmseError1
errors[test] = (error0 + error1)/2
fig, (ax, ax2) = plt.subplots(nrows=2, ncols=1, sharex=True)
ax.plot(times, X[:,0], label="estimate (dim 0)")
ax.plot(times, s0, label="target (dim 0)")
ax.set(ylabel='state', title='freq=%.3f, rmse=%.3f'%(freq0, error0), xlim=((0, t)), ylim=((-1.2, 1.2)))
ax.legend(loc='upper left')
ax2.plot(times, X[:,1], label="estimate (dim 1)")
ax2.plot(times, s1, label="target (dim 1)")
ax2.set(xlabel='time', ylabel='state', title='freq=%.3f, rmse=%.3f'%(freq1, error1), xlim=((0, t)), ylim=((-1.2, 1.2)))
ax2.legend(loc='upper left')
sns.despine()
fig.savefig("plots/oscillateNew_%s_test%s.pdf"%(neuron_type, test))
plt.close('all')
print('%s errors:'%neuron_type, errors)
np.savez("data/oscillateNew_%s.npz"%neuron_type, d1=d1, tauRise1=tauRise1, tauFall1=tauFall1, e1=e1, d2=d2, tauRise2=tauRise2, tauFall2=tauFall2, e2=e2, errors=errors)
return errors
def run(NPre=100,
N=100,
t=10,
nTrain=10,
nTest=3,
nAttr=5,
nEnc=10,
dt=0.001,
c=None,
fPre=DoubleExp(1e-3, 1e-1),
fNMDA=DoubleExp(10.6e-3, 285e-3),
fGABA=DoubleExp(0.5e-3, 1.5e-3),
fS=DoubleExp(2e-2, 1e-1),
Tff=0.3,
reg=1e-2,
load=[],
file=None):
if not c: c = t
if 0 in load:
dPreA = np.load(file)['dPreA']
dPreB = np.load(file)['dPreB']
dPreC = np.load(file)['dPreC']
dPreD = np.load(file)['dPreD']
else:
print('readout decoders for pre')
spikesInptA = np.zeros((nTrain, int(t / dt), NPre))
spikesInptB = np.zeros((nTrain, int(t / dt), NPre))
spikesInptC = np.zeros((nTrain, int(t / dt), NPre))
spikesInptD = np.zeros((nTrain, int(t / dt), NPre))
targetsInptA = np.zeros((nTrain, int(t / dt), 1))
targetsInptB = np.zeros((nTrain, int(t / dt), 1))
targetsInptC = np.zeros((nTrain, int(t / dt), 1))
targetsInptD = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stimA, _ = makeSignal(t, fPre, fNMDA, nAttr, dt=dt, seed=n)
stimB = stimA
stimC = lambda t: 0 if t < c else 1
stimD = lambda t: 1e-1
data = go(NPre=NPre,
N=N,
t=t,
dt=dt,
stimA=stimA,
stimB=stimB,
stimC=stimC,
stimD=stimD,
stage=None)
spikesInptA[n] = data['preA']
spikesInptB[n] = data['preB']
spikesInptC[n] = data['preC']
spikesInptD[n] = data['preD']
targetsInptA[n] = fPre.filt(data['inptA'], dt=dt)
targetsInptB[n] = fPre.filt(data['inptB'], dt=dt)
targetsInptC[n] = fPre.filt(data['inptC'], dt=dt)
targetsInptD[n] = fPre.filt(data['inptD'], dt=dt)
dPreA, XA, YA, errorA = decodeNoF(spikesInptA,
targetsInptA,
nTrain,
fPre,
dt=dt,
reg=reg)
dPreB, XB, YB, errorB = decodeNoF(spikesInptB,
targetsInptB,
nTrain,
fPre,
dt=dt,
reg=reg)
dPreC, XC, YC, errorC = decodeNoF(spikesInptC,
targetsInptC,
nTrain,
fPre,
dt=dt,
reg=reg)
dPreD, XD, YD, errorD = decodeNoF(spikesInptD,
targetsInptD,
nTrain,
fPre,
dt=dt,
reg=reg)
np.savez("data/integrateAttractors.npz",
dPreA=dPreA,
dPreB=dPreB,
dPreC=dPreC,
dPreD=dPreD)
times = np.arange(0, t * nTrain, dt)
plotState(times, XA, YA, errorA, "integrateAttractors", "preA",
t * nTrain)
plotState(times, XB, YB, errorB, "integrateAttractors", "preB",
t * nTrain)
plotState(times, XC, YC, errorC, "integrateAttractors", "preC",
t * nTrain)
plotState(times, XD, YD, errorD, "integrateAttractors", "preD",
t * nTrain)
if 0 in load:
ePreDEns = np.load(file)['ePreDEns']
else:
print("encoders for preD to ens")
ePreDEns = np.zeros((NPre, N, 1))
for n in range(nEnc):
data = go(NPre=NPre,
N=N,
t=t,
dt=dt,
dPreD=dPreD,
ePreDEns=ePreDEns,
stage=0)
ePreDEns = data['ePreDEns']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateAttractors", "preDEns")
np.savez("data/integrateAttractors.npz",
dPreA=dPreA,
dPreB=dPreB,
dPreC=dPreC,
dPreD=dPreD,
ePreDEns=ePreDEns)
if 1 in load:
ePreAFdfw = np.load(file)['ePreAFdfw']
ePreBEns = np.load(file)['ePreBEns']
ePreCOff = np.load(file)['ePreCOff']
else:
print("encoders for [preA, preB, preC] to [fdfw, ens, off]")
ePreAFdfw = np.zeros((NPre, N, 1))
ePreBEns = np.zeros((NPre, N, 1))
ePreCOff = np.zeros((NPre, N, 1))
for n in range(nEnc):
stimA, _ = makeSignal(t, fPre, fNMDA, nAttr, dt=dt, seed=n)
stimB = stimA
stimC = lambda t: 0 if t < c else 1
data = go(NPre=NPre,
N=N,
t=t,
dt=dt,
stimA=stimA,
stimB=stimB,
stimC=stimB,
dPreA=dPreA,
dPreB=dPreB,
dPreC=dPreC,
dPreD=dPreD,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreCOff=ePreCOff,
ePreDEns=ePreDEns,
stage=1)
ePreAFdfw = data['ePreAFdfw']
ePreBEns = data['ePreBEns']
ePreCOff = data['ePreCOff']
plotActivity(t, dt, fS, data['times'], data['fdfw'],
data['tarFdfw'], "integrateAttractors", "preAFdfw")
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateAttractors", "preBEns")
plotActivity(t, dt, fS, data['times'], data['off'], data['tarOff'],
"integrateAttractors", "preCOff")
np.savez("data/integrateAttractors.npz",
dPreA=dPreA,
dPreB=dPreB,
dPreC=dPreC,
dPreD=dPreD,
ePreDEns=ePreDEns,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreCOff=ePreCOff)
if 2 in load:
dFdfw = np.load(file)['dFdfw']
dOff = np.load(file)['dOff']
else:
print('readout decoders for fdfw and off')
spikesFdfw = np.zeros((nTrain, int(t / dt), N))
spikesOff = np.zeros((nTrain, int(t / dt), N))
targetsFdfw = np.zeros((nTrain, int(t / dt), 1))
targetsOff = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stimA, stimB = makeSignal(t, fPre, fNMDA, nAttr, dt=dt, seed=n)
stimC = lambda t: 0 if t < c else 1
data = go(NPre=NPre,
N=N,
t=t,
dt=dt,
stimA=stimA,
stimB=stimB,
stimC=stimC,
dPreA=dPreA,
dPreB=dPreB,
dPreC=dPreC,
dPreD=dPreD,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreCOff=ePreCOff,
ePreDEns=ePreDEns,
stage=2)
spikesFdfw[n] = data['fdfw']
spikesOff[n] = data['off']
targetsFdfw[n] = fNMDA.filt(Tff * fPre.filt(data['inptA']))
# targetsFdfw[n] = fNMDA.filt(fPre.filt(data['inptB']))
targetsOff[n] = fGABA.filt(fPre.filt(data['inptC']))
dFdfw, X1, Y1, error1 = decodeNoF(spikesFdfw,
targetsFdfw,
nTrain,
fNMDA,
dt=dt,
reg=reg)
dOff, X2, Y2, error2 = decodeNoF(spikesOff,
targetsOff,
nTrain,
fGABA,
dt=dt,
reg=reg)
np.savez("data/integrateAttractors.npz",
dPreA=dPreA,
dPreB=dPreB,
dPreC=dPreC,
dPreD=dPreD,
dFdfw=dFdfw,
dOff=dOff,
ePreDEns=ePreDEns,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreCOff=ePreCOff)
times = np.arange(0, t * nTrain, dt)
plotState(times, X1, Y1, error1, "integrateAttractors", "fdfw",
t * nTrain)
plotState(times, X2, Y2, error2, "integrateAttractors", "off",
t * nTrain)
if 3 in load:
eFdfwEns = np.load(file)['eFdfwEns']
else:
print("encoders for fdfw-to-ens")
eFdfwEns = np.zeros((N, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, fNMDA, nAttr, dt=dt, seed=n)
data = go(NPre=NPre,
N=N,
t=t,
dt=dt,
Tff=Tff,
stimA=stimA,
stimB=stimB,
dPreA=dPreA,
dPreB=dPreB,
dPreD=dPreD,
dFdfw=dFdfw,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreDEns=ePreDEns,
eFdfwEns=eFdfwEns,
stage=3)
eFdfwEns = data['eFdfwEns']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateAttractors", "fdfwEns")
np.savez("data/integrateAttractors.npz",
dPreA=dPreA,
dPreB=dPreB,
dPreC=dPreC,
dPreD=dPreD,
dFdfw=dFdfw,
dOff=dOff,
ePreDEns=ePreDEns,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreCOff=ePreCOff,
eFdfwEns=eFdfwEns)
if 4 in load:
dEns = np.load(file)['dEns']
else:
print('readout decoders for ens')
spikes = np.zeros((nTrain, int(t / dt), N))
targets = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stimA, stimB = makeSignal(t, fPre, fNMDA, nAttr, dt=dt, seed=n)
data = go(NPre=NPre,
N=N,
t=t,
dt=dt,
stimA=stimA,
stimB=stimB,
dPreA=dPreA,
dPreB=dPreB,
dPreD=dPreD,
dFdfw=dFdfw,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreDEns=ePreDEns,
eFdfwEns=eFdfwEns,
stage=4)
spikes[n] = data['ens']
# targets[n] = data['inptB'] # stimA rounded to nearest attractor
targets[n] = fNMDA.filt(fPre.filt(
data['inptB'])) # stimA rounded to nearest attractor
dEns, X, Y, error = decodeNoF(spikes,
targets,
nTrain,
fNMDA,
dt=dt,
reg=reg)
np.savez("data/integrateAttractors.npz",
dPreA=dPreA,
dPreB=dPreB,
dPreC=dPreC,
dPreD=dPreD,
dFdfw=dFdfw,
dOff=dOff,
dEns=dEns,
ePreDEns=ePreDEns,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreCOff=ePreCOff,
eFdfwEns=eFdfwEns)
times = np.arange(0, t * nTrain, dt)
plotState(times, X, Y, error, "integrateAttractors", "ens", t * nTrain)
if 5 in load:
eEnsEns = np.load(file)['eEnsEns']
else:
print("encoders from ens to ens")
eEnsEns = np.zeros((N, N, 1))
for n in range(nEnc):
stimA, stimB = makeSignal(t, fPre, fNMDA, nAttr, dt=dt, seed=n)
data = go(NPre=NPre,
N=N,
t=t,
dt=dt,
stimA=stimA,
stimB=stimB,
dPreA=dPreA,
dPreB=dPreB,
dPreD=dPreD,
dFdfw=dFdfw,
dEns=dEns,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreDEns=ePreDEns,
eFdfwEns=eFdfwEns,
eEnsEns=eEnsEns,
stage=5)
eEnsEns = data['eEnsEns']
plotActivity(t, dt, fS, data['times'], data['ens'], data['tarEns'],
"integrateAttractors", "ensEns")
np.savez("data/integrateAttractors.npz",
dPreA=dPreA,
dPreB=dPreB,
dPreC=dPreC,
dPreD=dPreD,
dFdfw=dFdfw,
dOff=dOff,
dEns=dEns,
ePreDEns=ePreDEns,
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreCOff=ePreCOff,
eFdfwEns=eFdfwEns,
eEnsEns=eEnsEns)
print("testing")
eOffFdfw = -1e2 * np.ones((N, N, 1))
vals = np.linspace(-1, 1, nTest)
att = np.linspace(-1, 1, nAttr)
for test in range(nTest):
stimA = lambda t: vals[test] if t < c else 0
stimB = lambda t: closestAttractor(vals[test], att)
stimC = lambda t: 0 if t < c else 1
DATest = lambda t: 0
data = go(NPre=NPre,
N=N,
t=t,
dt=dt,
stimA=stimA,
stimB=stimB,
stimC=stimC,
dPreA=dPreA,
dPreC=dPreC,
dPreD=dPreD,
dFdfw=dFdfw,
dEns=dEns,
dOff=dOff,
ePreAFdfw=ePreAFdfw,
ePreCOff=ePreCOff,
ePreDEns=ePreDEns,
eFdfwEns=eFdfwEns,
eEnsEns=eEnsEns,
eOffFdfw=eOffFdfw,
stage=9,
c=c,
DA=DATest)
aFdfw = fNMDA.filt(data['fdfw'])
aEns = fNMDA.filt(data['ens'])
aOff = fGABA.filt(data['off'])
xhatFdfw = np.dot(aFdfw, dFdfw) / Tff
xhatEns = np.dot(aEns, dEns)
xhatOff = np.dot(aOff, dOff)
xFdfw = fNMDA.filt(fPre.filt(data['inptA']))
# xEns = xFdfw[int(c/dt)] * np.ones_like(data['times'])
xEns = fNMDA.filt(fPre.filt(data['inptB']))
# xEns = data['inptB']
errorEns = rmse(xhatEns[int(c / dt):], xEns[int(c / dt):])
fig, ax = plt.subplots()
ax.plot(data['times'], xFdfw, alpha=0.5, label="input (filtered)")
ax.plot(data['times'], xhatFdfw, alpha=0.5, label="fdfw")
ax.plot(data['times'], xEns, label="target")
ax.plot(data['times'],
xhatEns,
alpha=0.5,
label="ens, rmse=%.3f" % errorEns)
ax.plot(data['times'], xhatOff, alpha=0.5, label="off")
ax.axvline(c, label="cutoff")
ax.set(xlabel='time',
ylabel='state',
xlim=((0, t)),
ylim=((-1.5, 1.5)))
ax.legend(loc='upper left')
sns.despine()
fig.savefig("plots/integrateAttractors_testFlat%s.pdf" % test)
def run(n_neurons=10000, neuron_type=LIF(), t_train=200, t=200, f=DoubleExp(1e-3, 1e-1), dt=0.001, dt_sample=0.003, tt=1.0, seed=0, smooth=30, reg=1e-1, penalty=0, df_evals=20, load_fd=False):
d_ens = np.zeros((n_neurons, 3))
f_ens = f
if load_fd:
load = np.load(load_fd)
d_ens = load['d_ens']
taus_ens = load['taus_ens']
f_ens = DoubleExp(taus_ens[0], taus_ens[1])
d_ens_gauss = load['d_ens_gauss']
else:
print('Optimizing ens filters and decoders')
data = go(d_ens, f_ens, neuron_type=neuron_type, n_neurons=n_neurons, L=True, t=t_train, f=f, dt=dt, dt_sample=dt_sample, seed=seed)
d_ens, f_ens, taus_ens = df_opt(data['x'], data['ens'], f, df_evals=df_evals, reg=reg, penalty=penalty, dt=dt_sample, dt_sample=dt_sample, name='lorenz_%s'%neuron_type)
all_targets_gauss = gaussian_filter1d(data['x'], sigma=smooth, axis=0)
all_spikes_gauss = gaussian_filter1d(data['ens'], sigma=smooth, axis=0)
d_ens_gauss = nengo.solvers.LstsqL2(reg=reg)(all_spikes_gauss, all_targets_gauss)[0]
np.savez('data/lorenz_%s_fd.npz'%neuron_type, d_ens=d_ens, taus_ens=taus_ens, d_ens_gauss=d_ens_gauss)
f_times = np.arange(0, 1, 0.0001)
fig, ax = plt.subplots()
ax.plot(f_times, f.impulse(len(f_times), dt=0.0001), label=r"$f^x, \tau_1=%.3f, \tau_2=%.3f$"
%(-1./f.poles[0], -1./f.poles[1]))
ax.plot(f_times, f_ens.impulse(len(f_times), dt=0.0001), label=r"$f^{ens}, \tau_1=%.3f, \tau_2=%.3f, d: %s/%s$"
%(-1./f_ens.poles[0], -1./f_ens.poles[1], np.count_nonzero(d_ens), n_neurons))
ax.set(xlabel='time (seconds)', ylabel='impulse response', ylim=((0, 10)))
ax.legend(loc='upper right')
plt.tight_layout()
plt.savefig("plots/lorenz_%s_filters_ens.pdf"%neuron_type)
tar = f.filt(data['x'], dt=dt_sample)
a_ens = f_ens.filt(data['ens'], dt=dt_sample)
ens = np.dot(a_ens, d_ens)
z_tar_peaks, _ = find_peaks(tar[:,2], height=0) # gives time indices of z-component-peaks
z_ens_peaks, _ = find_peaks(ens[:,2], height=0)
fig = plt.figure()
ax = fig.add_subplot(121, projection='3d')
ax2 = fig.add_subplot(122, projection='3d')
ax.plot(*tar.T, linewidth=0.25)
# ax.scatter(*tar[z_tar_peaks].T, color='r', s=1)
ax2.plot(*ens.T, linewidth=0.25)
# ax2.scatter(*ens[z_ens_peaks].T, color='r', s=1, marker='v')
ax.set(xlabel="x", ylabel="y", zlabel="z", xlim=((-20, 20)), ylim=((-10, 30)), zlim=((0, 40)))
ax.xaxis.pane.fill = False
ax.yaxis.pane.fill = False
ax.zaxis.pane.fill = False
ax.xaxis.pane.set_edgecolor('w')
ax.yaxis.pane.set_edgecolor('w')
ax.zaxis.pane.set_edgecolor('w')
ax.grid(False)
ax2.set(xlabel="x", ylabel="y", zlabel="z", xlim=((-20, 20)), ylim=((-10, 30)), zlim=((0, 40)))
ax2.xaxis.pane.fill = False
ax2.yaxis.pane.fill = False
ax2.zaxis.pane.fill = False
ax2.xaxis.pane.set_edgecolor('w')
ax2.yaxis.pane.set_edgecolor('w')
ax2.zaxis.pane.set_edgecolor('w')
ax2.grid(False)
plt.savefig("plots/lorenz_%s_train_3D.pdf"%neuron_type)
fig, (ax1, ax2, ax3) = plt.subplots(1, 3)
ax1.plot(tar[:,0], tar[:,1], linestyle="--", linewidth=0.25)
ax2.plot(tar[:,1], tar[:,2], linestyle="--", linewidth=0.25)
ax3.plot(tar[:,0], tar[:,2], linestyle="--", linewidth=0.25)
# ax2.scatter(tar[z_tar_peaks, 1], tar[z_tar_peaks, 2], s=3, color='r')
# ax3.scatter(tar[z_tar_peaks, 0], tar[z_tar_peaks, 2], s=3, color='g')
ax1.plot(ens[:,0], ens[:,1], linewidth=0.25)
ax2.plot(ens[:,1], ens[:,2], linewidth=0.25)
ax3.plot(ens[:,0], ens[:,2], linewidth=0.25)
# ax2.scatter(ens[z_ens_peaks, 1], ens[z_ens_peaks, 2], s=3, color='r', marker='v')
# ax3.scatter(ens[z_ens_peaks, 0], ens[z_ens_peaks, 2], s=3, color='g', marker='v')
ax1.set(xlabel='x', ylabel='y')
ax2.set(xlabel='y', ylabel='z')
ax3.set(xlabel='x', ylabel='z')
plt.tight_layout()
plt.savefig("plots/lorenz_%s_train_pairwise.pdf"%neuron_type)
plt.close('all')
# Plot tent map and fit the data to a gaussian
print('Plotting tent map')
trans = int(tt/dt)
tar_gauss = gaussian_filter1d(data['x'][trans:], sigma=smooth, axis=0)
a_ens_gauss = gaussian_filter1d(data['ens'][trans:], sigma=smooth, axis=0)
ens_gauss = np.dot(a_ens_gauss, d_ens_gauss)
z_tar_peaks = find_peaks(tar_gauss[:,2], height=0)[0][1:]
z_tar_values_horz = np.ravel(tar_gauss[z_tar_peaks, 2][:-1])
z_tar_values_vert = np.ravel(tar_gauss[z_tar_peaks, 2][1:])
z_ens_peaks = find_peaks(ens_gauss[:,2], height=0)[0][1:]
z_ens_values_horz = np.ravel(ens_gauss[z_ens_peaks, 2][:-1])
z_ens_values_vert = np.ravel(ens_gauss[z_ens_peaks, 2][1:])
# def gaussian(x, mu, sigma, mag):
# return mag * np.exp(-0.5*(np.square((x-mu)/sigma)))
# p0 = [36, 2, 40]
# param_ens, _ = curve_fit(gaussian, z_ens_values_horz, z_ens_values_vert, p0=p0)
# param_tar, _ = curve_fit(gaussian, z_tar_values_horz, z_tar_values_vert, p0=p0)
# horzs_tar = np.linspace(np.min(z_tar_values_horz), np.max(z_tar_values_horz), 100)
# gauss_tar = gaussian(horzs_tar, param_tar[0], param_tar[1], param_tar[2])
# horzs_ens = np.linspace(np.min(z_ens_values_horz), np.max(z_ens_values_horz), 100)
# gauss_ens = gaussian(horzs_ens, param_ens[0], param_ens[1], param_ens[2])
# error = entropy(gauss_ens, gauss_tar)
fig, ax = plt.subplots()
ax.scatter(z_tar_values_horz, z_tar_values_vert, alpha=0.5, color='r', label='target')
# ax.plot(horzs_tar, gauss_tar, color='r', linestyle='--', label='target fit')
ax.scatter(z_ens_values_horz, z_ens_values_vert, alpha=0.5, color='b', label='ens')
# ax.plot(horzs_ens, gauss_ens, color='b', linestyle='--', label='ens fit')
ax.set(xlabel=r'$\mathrm{max}_n (z)$', ylabel=r'$\mathrm{max}_{n+1} (z)$')#, title='error=%.5f'%error)
plt.legend(loc='upper right')
plt.savefig("plots/lorenz_%s_train_tent.pdf"%(neuron_type))
print("testing")
data = go(d_ens, f_ens, neuron_type=neuron_type, n_neurons=n_neurons, L=False, t=t, f=f, dt=dt, dt_sample=dt_sample, seed=seed)
tar = f.filt(data['x'], dt=dt_sample)
a_ens = f_ens.filt(data['ens'], dt=dt_sample)
ens = np.dot(a_ens, d_ens)
z_tar_peaks, _ = find_peaks(tar[:,2], height=0) # gives time indices of z-component-peaks
z_ens_peaks, _ = find_peaks(ens[:,2], height=0)
fig = plt.figure()
ax = fig.add_subplot(121, projection='3d')
ax2 = fig.add_subplot(122, projection='3d')
ax.plot(*tar.T, linewidth=0.25)
# ax.scatter(*tar[z_tar_peaks].T, color='r', s=1)
ax2.plot(*ens.T, linewidth=0.25)
# ax2.scatter(*ens[z_ens_peaks].T, color='r', s=1, marker='v')
ax.set(xlabel="x", ylabel="y", zlabel="z", xlim=((-20, 20)), ylim=((-10, 30)), zlim=((0, 40)))
ax.xaxis.pane.fill = False
ax.yaxis.pane.fill = False
ax.zaxis.pane.fill = False
ax.xaxis.pane.set_edgecolor('w')
ax.yaxis.pane.set_edgecolor('w')
ax.zaxis.pane.set_edgecolor('w')
ax.grid(False)
ax2.set(xlabel="x", ylabel="y", zlabel="z", xlim=((-20, 20)), ylim=((-10, 30)), zlim=((0, 40)))
ax2.xaxis.pane.fill = False
ax2.yaxis.pane.fill = False
ax2.zaxis.pane.fill = False
ax2.xaxis.pane.set_edgecolor('w')
ax2.yaxis.pane.set_edgecolor('w')
ax2.zaxis.pane.set_edgecolor('w')
ax2.grid(False)
plt.savefig("plots/lorenz_%s_test_3D.pdf"%neuron_type)
fig, (ax1, ax2, ax3) = plt.subplots(1, 3)
ax1.plot(tar[:,0], tar[:,1], linestyle="--", linewidth=0.25)
ax2.plot(tar[:,1], tar[:,2], linestyle="--", linewidth=0.25)
ax3.plot(tar[:,0], tar[:,2], linestyle="--", linewidth=0.25)
# ax2.scatter(tar[z_tar_peaks, 1], tar[z_tar_peaks, 2], s=3, color='r')
# ax3.scatter(tar[z_tar_peaks, 0], tar[z_tar_peaks, 2], s=3, color='g')
ax1.plot(ens[:,0], ens[:,1], linewidth=0.25)
ax2.plot(ens[:,1], ens[:,2], linewidth=0.25)
ax3.plot(ens[:,0], ens[:,2], linewidth=0.25)
# ax2.scatter(ens[z_ens_peaks, 1], ens[z_ens_peaks, 2], s=3, color='r', marker='v')
# ax3.scatter(ens[z_ens_peaks, 0], ens[z_ens_peaks, 2], s=3, color='g', marker='v')
ax1.set(xlabel='x', ylabel='y')
ax2.set(xlabel='y', ylabel='z')
ax3.set(xlabel='x', ylabel='z')
plt.tight_layout()
plt.savefig("plots/lorenz_%s_test_pairwise.pdf"%neuron_type)
plt.close('all')
# Plot tent map and fit the data to a gaussian
print('Plotting tent map')
trans = int(tt/dt)
tar_gauss = gaussian_filter1d(data['x'][trans:], sigma=smooth, axis=0)
a_ens_gauss = gaussian_filter1d(data['ens'][trans:], sigma=smooth, axis=0)
ens_gauss = np.dot(a_ens_gauss, d_ens_gauss)
z_tar_peaks = find_peaks(tar_gauss[:,2], height=0)[0][1:]
z_tar_values_horz = np.ravel(tar_gauss[z_tar_peaks, 2][:-1])
z_tar_values_vert = np.ravel(tar_gauss[z_tar_peaks, 2][1:])
z_ens_peaks = find_peaks(ens_gauss[:,2], height=0)[0][1:]
z_ens_values_horz = np.ravel(ens_gauss[z_ens_peaks, 2][:-1])
z_ens_values_vert = np.ravel(ens_gauss[z_ens_peaks, 2][1:])
# def gaussian(x, mu, sigma, mag):
# return mag * np.exp(-0.5*(np.square((x-mu)/sigma)))
# p0 = [36, 2, 40]
# param_ens, _ = curve_fit(gaussian, z_ens_values_horz, z_ens_values_vert, p0=p0)
# param_tar, _ = curve_fit(gaussian, z_tar_values_horz, z_tar_values_vert, p0=p0)
# horzs_tar = np.linspace(np.min(z_tar_values_horz), np.max(z_tar_values_horz), 100)
# gauss_tar = gaussian(horzs_tar, param_tar[0], param_tar[1], param_tar[2])
# horzs_ens = np.linspace(np.min(z_ens_values_horz), np.max(z_ens_values_horz), 100)
# gauss_ens = gaussian(horzs_ens, param_ens[0], param_ens[1], param_ens[2])
# error = entropy(gauss_ens, gauss_tar)
fig, ax = plt.subplots()
ax.scatter(z_tar_values_horz, z_tar_values_vert, alpha=0.5, color='r', label='target')
# ax.plot(horzs_tar, gauss_tar, color='r', linestyle='--', label='target fit')
ax.scatter(z_ens_values_horz, z_ens_values_vert, alpha=0.5, color='b', label='ens')
# ax.plot(horzs_ens, gauss_ens, color='b', linestyle='--', label='ens fit')
ax.set(xlabel=r'$\mathrm{max}_n (z)$', ylabel=r'$\mathrm{max}_{n+1} (z)$')#, title='error=%.5f'%error)
plt.legend(loc='upper right')
plt.savefig("plots/lorenz_%s_test_tent.pdf"%(neuron_type))
def go(NPre=100,
N=100,
t=10,
c=None,
seed=1,
dt=0.001,
tTrans=0.01,
stage=None,
alpha=3e-7,
eMax=1e-1,
Tff=0.3,
fPre=DoubleExp(1e-3, 1e-1),
fNMDA=DoubleExp(10.6e-3, 285e-3),
fGABA=DoubleExp(0.5e-3, 1.5e-3),
fS=DoubleExp(1e-3, 1e-1),
dPreA=None,
dPreB=None,
dPreC=None,
dPreD=None,
dFdfw=None,
dEns=None,
dOff=None,
ePreAFdfw=None,
ePreBEns=None,
ePreCOff=None,
eFdfwEns=None,
eEnsEns=None,
ePreDEns=None,
eOffFdfw=None,
stimA=lambda t: 0,
stimB=lambda t: 0,
stimC=lambda t: 0,
stimD=lambda t: 0,
DA=lambda t: 0):
if not c: c = t
with nengo.Network(seed=seed) as model:
inptA = nengo.Node(stimA)
inptB = nengo.Node(stimB)
inptC = nengo.Node(stimC)
inptD = nengo.Node(stimD)
preA = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
preB = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
preC = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
preD = nengo.Ensemble(NPre, 1, max_rates=Uniform(30, 30), seed=seed)
fdfw = nengo.Ensemble(N,
1,
neuron_type=Bio("Pyramidal", DA=DA),
seed=seed)
ens = nengo.Ensemble(N,
1,
neuron_type=Bio("Pyramidal", DA=DA),
seed=seed + 1)
off = nengo.Ensemble(N,
1,
neuron_type=Bio("Interneuron", DA=DA),
seed=seed + 3)
tarFdfw = nengo.Ensemble(N,
1,
max_rates=Uniform(30, 30),
intercepts=Uniform(-0.8, 0.8),
seed=seed)
tarEns = nengo.Ensemble(N,
1,
max_rates=Uniform(30, 30),
intercepts=Uniform(-0.8, 0.8),
seed=seed + 1)
tarOff = nengo.Ensemble(N,
1,
max_rates=Uniform(30, 30),
intercepts=Uniform(0.2, 0.8),
encoders=Choice([[1]]),
seed=seed + 3)
cA = nengo.Connection(inptA, preA, synapse=None, seed=seed)
cB = nengo.Connection(inptB, preB, synapse=None, seed=seed)
cC = nengo.Connection(inptC, preC, synapse=None, seed=seed)
cD = nengo.Connection(inptD, preD, synapse=None, seed=seed)
pInptA = nengo.Probe(inptA, synapse=None)
pInptB = nengo.Probe(inptB, synapse=None)
pInptC = nengo.Probe(inptC, synapse=None)
pInptD = nengo.Probe(inptD, synapse=None)
pPreA = nengo.Probe(preA.neurons, synapse=None)
pPreB = nengo.Probe(preB.neurons, synapse=None)
pPreC = nengo.Probe(preC.neurons, synapse=None)
pPreD = nengo.Probe(preD.neurons, synapse=None)
pFdfw = nengo.Probe(fdfw.neurons, synapse=None)
pTarFdfw = nengo.Probe(tarFdfw.neurons, synapse=None)
pEns = nengo.Probe(ens.neurons, synapse=None)
pTarEns = nengo.Probe(tarEns.neurons, synapse=None)
pOff = nengo.Probe(off.neurons, synapse=None)
pTarOff = nengo.Probe(tarOff.neurons, synapse=None)
if stage == 0:
nengo.Connection(preD, tarEns, synapse=fPre, seed=seed)
c0 = nengo.Connection(preD,
ens,
synapse=fPre,
solver=NoSolver(dPreD),
seed=seed)
learnEncoders(c0,
tarEns,
fS,
alpha=10 * alpha,
eMax=10 * eMax,
tTrans=tTrans)
if stage == 1:
nengo.Connection(inptA, tarFdfw, synapse=fPre, seed=seed)
nengo.Connection(inptB, tarEns, synapse=fPre, seed=seed)
nengo.Connection(inptC, tarOff, synapse=fPre, seed=seed)
c0 = nengo.Connection(preD,
ens,
synapse=fPre,
solver=NoSolver(dPreD),
seed=seed)
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c2 = nengo.Connection(preB,
ens,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed)
c3 = nengo.Connection(preC,
off,
synapse=fPre,
solver=NoSolver(dPreC),
seed=seed)
learnEncoders(c1,
tarFdfw,
fS,
alpha=3 * alpha,
eMax=3 * eMax,
tTrans=tTrans)
learnEncoders(c2,
tarEns,
fS,
alpha=10 * alpha,
eMax=10 * eMax,
tTrans=tTrans)
learnEncoders(c3,
tarOff,
fS,
alpha=3 * alpha,
eMax=3 * eMax,
tTrans=tTrans)
if stage == 2:
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c2 = nengo.Connection(preC,
off,
synapse=fPre,
solver=NoSolver(dPreC),
seed=seed)
if stage == 3:
cB.synapse = fNMDA
ff = nengo.Ensemble(1, 1, neuron_type=nengo.Direct())
fb = nengo.Ensemble(1, 1, neuron_type=nengo.Direct())
nengo.Connection(inptA, ff, synapse=fPre, seed=seed)
nengo.Connection(inptB, fb, synapse=fNMDA, seed=seed)
nengo.Connection(fb, tarEns, synapse=fPre, seed=seed)
nengo.Connection(ff,
tarEns,
synapse=fNMDA,
transform=Tff,
seed=seed)
c0 = nengo.Connection(preD,
ens,
synapse=fPre,
solver=NoSolver(dPreD),
seed=seed)
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c2 = nengo.Connection(preB,
ens,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed)
c3 = nengo.Connection(fdfw,
ens,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
learnEncoders(c3,
tarEns,
fS,
alpha=3 * alpha,
eMax=3 * eMax,
tTrans=tTrans)
if stage == 4:
cB.synapse = fNMDA
c0 = nengo.Connection(preD,
ens,
synapse=fPre,
solver=NoSolver(dPreD),
seed=seed)
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c2 = nengo.Connection(preB,
ens,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed)
c3 = nengo.Connection(fdfw,
ens,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
if stage == 5:
preB2 = nengo.Ensemble(NPre,
1,
max_rates=Uniform(30, 30),
seed=seed)
ens2 = nengo.Ensemble(N,
1,
neuron_type=Bio("Pyramidal", DA=DA),
seed=seed + 1)
ens3 = nengo.Ensemble(N,
1,
neuron_type=Bio("Pyramidal", DA=DA),
seed=seed + 1)
nengo.Connection(inptB, preB2, synapse=fNMDA, seed=seed)
c0a = nengo.Connection(preD,
ens,
synapse=fPre,
solver=NoSolver(dPreD),
seed=seed)
c0b = nengo.Connection(preD,
ens2,
synapse=fPre,
solver=NoSolver(dPreD),
seed=seed)
c0c = nengo.Connection(preD,
ens3,
synapse=fPre,
solver=NoSolver(dPreD),
seed=seed)
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c2 = nengo.Connection(fdfw,
ens,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
c3 = nengo.Connection(preB,
ens2,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed)
c4 = nengo.Connection(ens2,
ens,
synapse=NMDA(),
solver=NoSolver(dEns),
seed=seed)
c5 = nengo.Connection(fdfw,
ens3,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
c6 = nengo.Connection(preB2,
ens3,
synapse=fPre,
solver=NoSolver(dPreB),
seed=seed)
learnEncoders(c4, ens3, fS, alpha=alpha, eMax=eMax, tTrans=tTrans)
pTarEns = nengo.Probe(ens3.neurons, synapse=None)
if stage == 9:
c0 = nengo.Connection(preD,
ens,
synapse=fPre,
solver=NoSolver(dPreD),
seed=seed)
c1 = nengo.Connection(preA,
fdfw,
synapse=fPre,
solver=NoSolver(dPreA),
seed=seed)
c2 = nengo.Connection(fdfw,
ens,
synapse=NMDA(),
solver=NoSolver(dFdfw),
seed=seed)
c3 = nengo.Connection(ens,
ens,
synapse=NMDA(),
solver=NoSolver(dEns),
seed=seed)
c6 = nengo.Connection(preC,
off,
synapse=fPre,
solver=NoSolver(dPreC),
seed=seed)
c7 = nengo.Connection(off,
fdfw,
synapse=GABA(),
solver=NoSolver(dOff),
seed=seed)
with nengo.Simulator(model, seed=seed, dt=dt, progress_bar=False) as sim:
if stage == 0:
setWeights(c0, dPreD, ePreDEns)
if stage == 1:
setWeights(c0, dPreD, ePreDEns)
setWeights(c1, dPreA, ePreAFdfw)
setWeights(c2, dPreB, ePreBEns)
setWeights(c3, dPreC, ePreCOff)
if stage == 2:
setWeights(c1, dPreA, ePreAFdfw)
setWeights(c2, dPreC, ePreCOff)
if stage == 3:
setWeights(c0, dPreD, ePreDEns)
setWeights(c1, dPreA, ePreAFdfw)
setWeights(c2, dPreB, ePreBEns)
setWeights(c3, dFdfw, eFdfwEns)
if stage == 4:
setWeights(c0, dPreD, ePreDEns)
setWeights(c1, dPreA, ePreAFdfw)
setWeights(c2, dPreB, ePreBEns)
setWeights(c3, dFdfw, eFdfwEns)
if stage == 5:
setWeights(c0a, dPreD, ePreDEns)
setWeights(c0b, dPreD, ePreDEns)
setWeights(c0c, dPreD, ePreDEns)
setWeights(c1, dPreA, ePreAFdfw)
setWeights(c2, dFdfw, eFdfwEns)
setWeights(c3, dPreB, ePreBEns)
setWeights(c4, dEns, eEnsEns)
setWeights(c5, dFdfw, eFdfwEns)
setWeights(c6, dPreB, ePreBEns)
if stage == 9:
setWeights(c0, dPreD, ePreDEns)
setWeights(c1, dPreA, ePreAFdfw)
setWeights(c2, dFdfw, eFdfwEns)
setWeights(c3, dEns, eEnsEns)
setWeights(c6, dPreC, ePreCOff)
setWeights(c7, dOff, eOffFdfw)
neuron.h.init()
sim.run(t, progress_bar=True)
reset_neuron(sim, model)
ePreDEns = c0.e if stage == 0 else ePreDEns
ePreAFdfw = c1.e if stage == 1 else ePreAFdfw
ePreBEns = c2.e if stage == 1 else ePreBEns
ePreCOff = c3.e if stage == 1 else ePreCOff
eFdfwEns = c3.e if stage == 3 else eFdfwEns
eEnsEns = c4.e if stage == 5 else eEnsEns
return dict(
times=sim.trange(),
inptA=sim.data[pInptA],
inptB=sim.data[pInptB],
inptC=sim.data[pInptC],
inptD=sim.data[pInptD],
preA=sim.data[pPreA],
preB=sim.data[pPreB],
preC=sim.data[pPreC],
preD=sim.data[pPreD],
fdfw=sim.data[pFdfw],
ens=sim.data[pEns],
off=sim.data[pOff],
tarFdfw=sim.data[pTarFdfw],
tarEns=sim.data[pTarEns],
tarOff=sim.data[pTarOff],
ePreAFdfw=ePreAFdfw,
ePreBEns=ePreBEns,
ePreCOff=ePreCOff,
ePreDEns=ePreDEns,
eFdfwEns=eFdfwEns,
eEnsEns=eEnsEns,
eOffFdfw=eOffFdfw,
)
def run(t=60, tTrans=30, dt=1e-4, maxRate=30, intercept=-0.25, f=DoubleExp(1e-3, 3e-2), fS=DoubleExp(1e-2, 1e-1), nBins=21):
print('training readout decoders for pre')
stim = makeSignal(t, f, dt=0.001, seed=0)
data = go(t=t, m=Uniform(maxRate, maxRate), i=Uniform(intercept, intercept), dt=0.001, f=f, fS=fS, stim=stim)
spikes = np.array([data['pre']])
targets = np.array([f.filt(data['inpt'], dt=0.001)])
d1, f1, tauRise1, tauFall1, X, Y, error = decode(spikes, targets, 1, dt=0.001, name="tuneNew")
print("training encoders")
e1 = np.zeros((100, 1, 1))
stim = makeSignal(t, f, dt=dt, seed=0)
data = go(d1=d1, e1=e1, f1=f1, t=t, dt=dt, f=f, fS=fS, stim=stim, l1=True)
x = fS.filt(data['inpt'], dt=dt)
times = data['times']
aLif = fS.filt(data['lif'], dt=dt)
aWilson = fS.filt(data['wilson'], dt=dt)
aBio = fS.filt(data['bio'], dt=dt)
fig, (ax, ax2) = plt.subplots(nrows=2, ncols=1, sharex=True)
ax.plot(times, x, label="input")
ax.axhline(intercept, color='k', alpha=0.5, label="intercept")
ax2.plot(times, aLif, alpha=0.5, label='LIF')
ax2.plot(times, aWilson, alpha=0.5, label='Wilson')
ax2.plot(times, aBio, alpha=0.5, label='bio')
ax.set(xlim=((0, tTrans)), ylim=((-1, 1)), ylabel=r"$\mathbf{x}$(t)")
ax2.set(xlim=((0, tTrans)), ylim=((0, 40)), xlabel='time (s)', ylabel=r"$a(t)$")
ax.legend(loc='upper left')
ax2.legend(loc='upper left')
plt.savefig('plots/tuneNew.pdf')
plt.close('all')
x = fS.filt(data['inpt'], dt=dt)[int(tTrans/dt):]
times = data['times'][int(tTrans/dt):]
aLif = fS.filt(data['lif'], dt=dt)[int(tTrans/dt):]
aWilson = fS.filt(data['wilson'], dt=dt)[int(tTrans/dt):]
aBio = fS.filt(data['bio'], dt=dt)[int(tTrans/dt):]
bins = np.linspace(-1, 1, nBins)
bLif, bWilson, bBio = [], [], []
for b in range(len(bins)):
bLif.append([])
bWilson.append([])
bBio.append([])
for t in range(len(times)):
idx = (np.abs(bins - x[t])).argmin()
bLif[idx].append(aLif[t][0])
bWilson[idx].append(aWilson[t][0])
bBio[idx].append(aBio[t][0])
mLif, mBio, mWilson = np.zeros_like(bins), np.zeros_like(bins), np.zeros_like(bins)
ci1Lif, ci1Bio, ci1Wilson = np.zeros_like(bins), np.zeros_like(bins), np.zeros_like(bins)
ci2Lif, ci2Bio, ci2Wilson = np.zeros_like(bins), np.zeros_like(bins), np.zeros_like(bins)
for b in range(len(bins)):
mLif[b] = np.mean(bLif[b])
mWilson[b] = np.mean(bWilson[b])
mBio[b] = np.mean(bBio[b])
ci1Lif[b] = sns.utils.ci(np.array(bLif[b]), which=95)[0]
ci1Wilson[b] = sns.utils.ci(np.array(bWilson[b]), which=95)[0]
ci1Bio[b] = sns.utils.ci(np.array(bBio[b]), which=95)[0]
ci2Lif[b] = sns.utils.ci(np.array(bLif[b]), which=95)[1]
ci2Wilson[b] = sns.utils.ci(np.array(bWilson[b]), which=95)[1]
ci2Bio[b] = sns.utils.ci(np.array(bBio[b]), which=95)[1]
fig, ax = plt.subplots()
ax.plot(bins, mLif, label="LIF")
ax.fill_between(bins, ci1Lif, ci2Lif, alpha=0.1)
ax.plot(bins, mWilson, label="Wilson")
ax.fill_between(bins, ci1Wilson, ci2Wilson, alpha=0.1)
ax.plot(bins, mBio, label="Bio")
ax.fill_between(bins, ci1Bio, ci2Bio, alpha=0.1)
ax.axhline(maxRate, color='k', linestyle="--", label="target max rate")
ax.axvline(intercept, color='k', label="target intercept")
ax.set(xlim=((-1, 1)), ylim=((0, maxRate+1)), xlabel=r"$\mathbf{x}$", ylabel="firing rate (Hz)")
ax.legend()
fig.savefig("plots/tuneNew2.pdf")
def run(NPre=100,
N=100,
t=10,
c=None,
nTrain=10,
nTest=5,
dt=0.001,
neuron_type=LIF(),
fPre=DoubleExp(1e-3, 1e-1),
fNMDA=DoubleExp(10.6e-3, 285e-3),
reg=1e-2,
load=[],
file=None,
neg=True):
if not c: c = t
if 0 in load:
dPre = np.load(file)['dPre']
else:
print('readout decoders for pre')
spikesInpt = np.zeros((nTrain, int(t / dt), NPre))
targetsInpt = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stim = makeSignal(t, fPre, fNMDA, seed=n)
data = go(NPre=NPre,
N=N,
t=t,
fPre=fPre,
fNMDA=fNMDA,
neuron_type=neuron_type,
stim=stim)
spikesInpt[n] = data['pre']
targetsInpt[n] = fPre.filt(data['inpt'], dt=dt)
dPre, X, Y, error = decodeNoF(spikesInpt,
targetsInpt,
nTrain,
fPre,
reg=reg)
np.savez("data/diffMemory_%s.npz" % neuron_type, dPre=dPre)
times = np.arange(0, t * nTrain, 0.001)
plotState(times, X, Y, error, "diffMemory_%s" % neuron_type, "pre",
t * nTrain)
if 1 in load:
dDiff = np.load(file)['dDiff']
else:
print('readout decoders for diff')
spikes = np.zeros((nTrain, int(t / dt), N))
targets = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stim = makeSignal(t, fPre, fNMDA, seed=n)
data = go(NPre=NPre,
N=N,
t=t,
fPre=fPre,
fNMDA=fNMDA,
neuron_type=neuron_type,
stim=stim,
dPre=dPre)
spikes[n] = data['diff']
targets[n] = fNMDA.filt(fPre.filt(data['inpt'], dt=dt), dt=dt)
dDiff, X, Y, error = decodeNoF(spikes, targets, nTrain, fNMDA, reg=reg)
np.savez("data/diffMemory_%s.npz" % neuron_type,
dPre=dPre,
dDiff=dDiff)
times = np.arange(0, t * nTrain, dt)
plotState(times, X, Y, error, "diffMemory_%s" % neuron_type, "diff",
t * nTrain)
if 2 in load:
dEns = np.load(file)['dEns']
dNeg = np.load(file)['dNeg']
else:
print('readout decoders for ens')
spikes = np.zeros((nTrain, int(t / dt), N))
targets = np.zeros((nTrain, int(t / dt), 1))
for n in range(nTrain):
stim = makeSignal(t, fPre, fNMDA, seed=n)
# data = go(NPre=NPre, N=N, t=t, fPre=fPre, fNMDA=fNMDA, neuron_type=neuron_type, stim=stim, dPre=dPre, dDiff=dDiff)
data = go(NPre=NPre,
N=N,
t=t,
fPre=fPre,
fNMDA=fNMDA,
neuron_type=neuron_type,
stim=stim,
dPre=dPre,
dDiff=dDiff,
train=True,
Tff=0.3)
spikes[n] = data['ens']
# targets[n] = fNMDA.filt(fNMDA.filt(fPre.filt(data['inpt'], dt=dt), dt=dt), dt=dt)
targets[n] = fNMDA.filt(fPre.filt(data['intg'], dt=dt), dt=dt)
dEns, X, Y, error = decodeNoF(spikes, targets, nTrain, fNMDA, reg=reg)
dNeg = -np.array(dEns)
np.savez("data/diffMemory_%s.npz" % neuron_type,
dPre=dPre,
dDiff=dDiff,
dEns=dEns,
dNeg=dNeg)
times = np.arange(0, t * nTrain, dt)
plotState(times, X, Y, error, "diffMemory_%s" % neuron_type, "ens",
t * nTrain)
print('testing')
vals = np.linspace(-1, 1, nTest)
for test in range(nTest):
if neg:
stim = lambda t: vals[test] if t < c else 0
data = go(NPre=NPre,
N=N,
t=t,
fPre=fPre,
fNMDA=fNMDA,
neuron_type=neuron_type,
stim=stim,
dPre=dPre,
dDiff=dDiff,
dEns=dEns,
dNeg=dNeg,
c=c)
else:
stim = makeSignal(t, fPre, fNMDA, seed=test)
data = go(NPre=NPre,
N=N,
t=t,
fPre=fPre,
fNMDA=fNMDA,
neuron_type=neuron_type,
stim=stim,
dPre=dPre,
dDiff=dDiff,
dEns=dEns,
dNeg=None,
c=None,
Tff=0.3)
aDiff = fNMDA.filt(fPre.filt(data['diff'], dt=dt), dt=dt)
aEns = fNMDA.filt(fNMDA.filt(fPre.filt(data['ens'], dt=dt), dt=dt),
dt=dt)
xhatDiff = np.dot(aDiff, dDiff)
xhatEns = np.dot(aEns, dEns)
u = fNMDA.filt(fPre.filt(data['inpt'], dt=dt), dt=dt)
u2 = fNMDA.filt(fNMDA.filt(fPre.filt(data['inpt'], dt=dt), dt=dt),
dt=dt)
x = fNMDA.filt(fNMDA.filt(fPre.filt(data['intg'], dt=dt), dt=dt),
dt=dt)
error = rmse(xhatEns, x)
fig, ax = plt.subplots()
if neg:
ax.plot(data['times'], u2, alpha=0.5, label="input (delayed)")
ax.axvline(c, label="cutoff")
else:
# ax.plot(data['times'], 0.3*u2, alpha=0.5, label="input")
ax.plot(data['times'], x, alpha=0.5, label="integral")
# ax.plot(data['times'], xhatDiff, label="diff")
ax.plot(data['times'], xhatEns, label="ens")
ax.set(xlabel='time',
ylabel='state',
title="rmse=%.3f" % error,
xlim=((0, t)),
ylim=((-1, 1)))
ax.legend(loc='upper left')
sns.despine()
fig.savefig("plots/diffMemory_%s_test%s.pdf" % (neuron_type, test))