def train_horizon_model(H, datadir):
# extract hyperparameters
hp = hyperparameters[H]
lr = hp['lr']
n_epochs = hp['n_epochs']
save_file = hp['save_file']
logdir = hp['logdir']
# load data
utils.set_rng_seed(1)
y_mean, y_std, u_mean, u_std = load_statistics(datadir)
train_data, train_trgt = load_helidata(datadir, 'train')
test_data, test_trgt = load_helidata(datadir, 'test')
valid_data, valid_trgt = load_helidata(datadir, 'valid')
# Define net
neural_net_kwargs = dict(input_size=10 * H,
hidden_sizes=[32] * 8,
output_size=6,
activation='tanh',
gain=1.0,
ln=False)
net = LagModel(neural_net_kwargs, H)
logger.setup(logdir, action='d')
# Train
system = train_net(net,
train_data,
train_trgt,
test_data,
test_trgt,
valid_data,
valid_trgt,
y_std,
lr,
logdir=logdir,
H=H,
n_epochs=n_epochs)
torch.save(system.state_dict(), save_file)
def train(datadir, logdir, lr, n_epochs, H, save_file='lstm.th'):
utils.set_rng_seed(1)
y_mean, y_std, u_mean, u_std = load_statistics(datadir)
train_data, train_trgt = load_helidata(datadir, 'train')
test_data, test_trgt = load_helidata(datadir, 'test')
valid_data, valid_trgt = load_helidata(datadir, 'valid')
net = LSTMModel(**DEFAULT_LSTM_KWARGS)
logger.setup(logdir, action='d')
# Train
system = train_net(net,
train_data,
train_trgt,
test_data,
test_trgt,
valid_data,
valid_trgt,
y_std,
lr,
logdir=logdir,
H=H,
n_epochs=n_epochs)
torch.save(system.state_dict(), save_file)
def main(logdir, datafile, valdatafile, subset, obsmodel, practice, wfac, xdim, hotstartdir, seed,
parallel):
utils.set_rng_seed(seed)
torch.set_default_dtype(torch.float64)
logger.setup(logdir)
# load train data
traindata = np.load(datafile)
u = torch.tensor(traindata['u'])
y = torch.tensor(traindata['y'])
valdata = np.load(valdatafile)
val_u = torch.tensor(valdata['u'])
val_y = torch.tensor(valdata['y'])
_, y_std, _, _ = load_statistics('./datasets/split_normalized')
if practice == 1:
inds = np.random.choice(466, 10, replace=False)
u = u[inds]
y = y[inds]
B, T, ydim = y.shape
_, _, udim = u.shape
t = torch.stack([torch.arange(T)] * B).to(torch.get_default_dtype())
# specify system
sid = loadmat(opj(hotstartdir, 'SID_%dD.mat' % xdim))
A = torch.tensor(sid['A']).to(torch.get_default_dtype())
Bsys = torch.tensor(sid['B']).to(torch.get_default_dtype())
C = torch.tensor(sid['C']).to(torch.get_default_dtype())
D = torch.tensor(sid['D']).to(torch.get_default_dtype())
NN = deepcopy(DEFAULT_NN)
NN['gain'] = 0.1
sys = DiscreteLinear(xdim, udim, ydim, A=A, B=Bsys, C=C, D=D, obsModel=NN)
# specify smoothing criteria
smoothing_criteria = []
vfac = 1.0
for b in range(B):
obscrit = GaussianObservationCriterion(vfac * torch.ones(ydim), t[b:b + 1], y[b:b + 1],
u=u[b:b + 1])
dyncrit = GaussianDynamicsCriterion(wfac * torch.ones(xdim), t[b:b + 1], u=u[b:b + 1])
smoothing_criteria.append(GroupSOSCriterion([obscrit, dyncrit]))
smooth_solver_kwargs = {'verbose': 0, 'tr_rho': 0.1}
# specify learning criteria
learning_criteria = [
GaussianObservationCriterion(torch.ones(ydim), t, y, u=u),
GaussianDynamicsCriterion(torch.ones(xdim), t, u=u)
]
learning_params = [list(sys._obs.parameters()), list(sys._dyn.parameters())]
learning_opts = ['torch_minimize', 'torch_minimize']
learner_opt_kwargs = [{
'method': 'Adam',
'lr': 5e-4,
'nepochs': 500,
'tr_rho': 0.5
}, {
'method': 'Adam',
'lr': 1e-3,
'nepochs': 500,
'tr_rho': 0.5
}]
# save params
run_params = dict(seed=seed, subset=subset, xdim=xdim, vfac=vfac, wfac=wfac,
learning_opts=learning_opts, learner_opt_kwargs=learner_opt_kwargs,
smooth_solver_kwargs=smooth_solver_kwargs, practice=practice,
obsmodel=obsmodel)
with open(opj(logdir, 'run_params.json'), 'w') as f:
json.dump(run_params, f)
# instantiate CEEM
class Tracker:
def __init__(self):
return
tracker = Tracker()
tracker.best_val_rmse = np.inf
def ecb(epoch):
torch.save(sys.state_dict(),
os.path.join(logger.get_dir(), 'ckpts', 'model_{}.th'.format(epoch)))
y_pred = gen_ypred_model(sys, val_u, val_y)
rms = compute_rms(val_y[:, 25:], y_pred[:, 25:], y_std)
val_rmse = float(rms.mean())
logger.logkv('test/val_rmse', val_rmse)
if val_rmse < tracker.best_val_rmse:
tracker.best_val_rmse = val_rmse
torch.save(sys.state_dict(), os.path.join(logger.get_dir(), 'ckpts', 'best_model.th'))
return
epoch_callbacks = [ecb]
def tcb(epoch):
# TODO
return False
termination_callback = tcb
ceem = CEEM(smoothing_criteria, learning_criteria, learning_params, learning_opts,
epoch_callbacks, termination_callback, parallel=parallel)
# run CEEM
x0 = 0.01 * torch.randn(B, T, xdim)
ceem.train(xs=x0, sys=sys, nepochs=5000, smooth_solver_kwargs=smooth_solver_kwargs,
learner_opt_kwargs=learner_opt_kwargs, subset=subset)
def main(const):
"""
Args:
const (int): if >= 0, trains SEIRD, else R-SEIRD
Notes:
R-SEIRD trained model can be found in 'data/reactive'
SEIRD trained model can be found in 'data/const'
"""
torch.manual_seed(1)
# load the data
counties = [
'Middlesex, Massachusetts, US', 'Fairfield, Connecticut, US',
'Kings, New York, US', 'Los Angeles, California, US',
'Miami-Dade, Florida, US', 'Cook, Illinois, US'
]
countydat = []
dates = []
minT = 1000
mus = [] # for tracking death rates, to initialize
for county_ in counties:
dates_, dat = get_us_county(county_, start_date='2/22/20')
mus.append(dat[-1, 1] / dat[-1, 0]) # compute death rate
dat = smooth_and_diff(dat) # moving average filter
countydat.append(dat)
dates.append(dates_)
minT = min(minT, dat.shape[0])
mu = np.mean(mus)
# make all trajectories the same length
countydat = [d[:minT, :] for d in countydat]
dates = [d[:minT] for d in dates]
# find largest confirmed cases for intializing x_{1:T}
C0summax = np.stack(countydat)[:, :, 0].sum(axis=1).max()
# create t, y tensors
countydat = np.stack(countydat)
B = countydat.shape[0]
T = countydat.shape[1]
t = torch.arange(T, dtype=dtype).unsqueeze(0).expand(B, T).detach()
first_d = pd.Series([d[0] for d in dates])
last_d = pd.Series([d[-1] for d in dates])
minD = first_d.min()
maxD = last_d.max()
print(minD, maxD)
d_off = torch.tensor(
(first_d - first_d.min()).dt.days.values).reshape(B, 1)
t = t + d_off
y = torch.tensor(countydat + 1, dtype=dtype).view(B, T, 2).log().detach()
# set up logdir and model
if const < 0:
logger.setup('data/reactive')
# instantiate system
system = ReactiveTime(betaE=0.3, mu=mu)
else:
logger.setup('data/const')
# instantiate system
system = SEIRDModel(betaE=0.3, mu=mu)
# specify criteria for smoothing and learning
wstd = 0.1
ystd = 1.0
Sig_v_inv = torch.tensor([1.0, 0.5]) / (ystd**2)
Sig_v_inv = torch.ones(2) / (ystd**2)
Sig_w_inv = torch.ones(4) / (wstd**2)
smoothing_criteria = []
for b in range(B):
obscrit = GaussianObservationCriterion(
Sig_v_inv, t[b:b + 1],
y[b:b + 1]) # pass in the inverse covariance
dyncrit = GaussianDynamicsCriterion(Sig_w_inv, t[b:b + 1])
smoothing_criteria.append(GroupSOSCriterion([obscrit, dyncrit]))
# specify solver kwargs
smooth_solver_kwargs = {
'verbose': 0, # to supress NLS printouts
'tr_rho': 0.5, # trust region for smoothing
'ftol': 1e-5, # solve smoothing to coarse tolerance
'gtol': 1e-5,
'xtol': 1e-5
}
# specify learning criteria
# note: learning criteria do not need to be specified separately for each b in B
dyncrit = GaussianDynamicsCriterion(Sig_w_inv, t)
obscrit = GaussianObservationCriterion(Sig_v_inv, t, y)
learning_criteria = [
GroupSOSCriterion([obscrit, dyncrit])
] # since the observation objective doesnt depend on parameters
learning_params = [list(system.parameters())
] # the parameters we want optimized
learning_opts = ['torch_minimize'] # the optimzer
learner_opt_kwargs = {
'method': 'Adam', # optimizer for learning
'tr_rho': 0.01, # trust region for learning
'lr': 5e-4,
'nepochs': 100,
}
lr_sched = lambda k: 5e-4 * 100 / (100 + k) # updated in ecb
# specify initial guess
C0 = torch.tensor(countydat[:, :, 0], dtype=dtype).view(B, T, 1)
S0 = torch.ones_like(C0) * C0summax * 5 # inital guess of population
E0 = C0
I0 = C0
D0 = torch.tensor(countydat[:, :, 1], dtype=dtype).view(B, T, 1)
R0 = 0.5 * (C0 + D0)
xsm = torch.cat([S0, E0, I0, R0 + D0], dim=-1).log().detach()
tt = torch.arange(xsm.shape[1]).reshape(1, -1).expand(B, T)
# define callback to save model
start_time = time()
def ecb(k):
logger.logkv('train/epoch', k)
logger.logkv('train/elapsed_time', time() - start_time)
# update lr
learner_opt_kwargs['lr'] = lr_sched(k)
logger.logkv('train/lr', lr_sched(k))
torch.save(system.state_dict(),
os.path.join(logger.get_dir(), 'ckpts', 'best_model.th'))
torch.save(xsm, os.path.join(logger.get_dir(), 'ckpts', 'best_xsm.th'))
logger.logkv('train/mu', float(system.logmu.exp()))
ecb(0)
# instantiate CEEM and train
ceem = CEEM(smoothing_criteria,
learning_criteria,
learning_params,
learning_opts, [ecb],
lambda x: False,
parallel=4 if B > 1 else 0)
ceem.train(xs=xsm,
sys=system,
nepochs=1000,
smooth_solver_kwargs=smooth_solver_kwargs,
learner_opt_kwargs=learner_opt_kwargs)
# save xsm for later
torch.save(xsm, os.path.join(logger.get_dir(), 'xsm.th'))
# save criteria for later
torch.save(
dict(smoothing_criteria=smoothing_criteria,
learning_criteria=learning_criteria,
mu=mu,
t=t,
y=y), os.path.join(logger.get_dir(), 'criteria.th'))
def train(seed, logdir, sys_seed, k, b):
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
ystd = 0.01
# ystd = 0.
torch.set_default_dtype(torch.float64)
logger.setup(logdir, action='d')
N = 128
n = 3 * k
B = b
true_system = default_lorenz_system(k, obsdif=2)
utils.set_rng_seed(sys_seed)
xdim = true_system.xdim
ydim = true_system.ydim
dt = true_system._dt
x0mean = torch.tensor([[-6] * k + [-6] * k + [24.] * k]).unsqueeze(0)
# simulate true_dynamics over IC distribution
x_test = x0mean.repeat(1024, 1, 1)
x_test += 5.0 * torch.randn_like(x_test)
x_test = x_test.detach()
t_test = torch.zeros(1024, 1)
tgt_test = true_system.step_derivs(t_test, x_test).detach()
## simulate the true system
xs = [x0mean.repeat(B, 1, 1)]
xs[0] += 2.5 * torch.randn_like(xs[0])
with torch.no_grad():
for t in range(N - 1):
xs.append(true_system.step(torch.tensor([0.] * B), xs[-1]))
xs = torch.cat(xs, dim=1)
fig = plt.figure()
for b in range(B):
ax = fig.add_subplot(int(np.ceil(B / 2.)), 2, b + 1, projection='3d')
for k_ in range(k):
plot3d(plt.gca(),
xs[b, :, k_],
xs[b, :, k + k_],
xs[b, :, 2 * k + k_],
linestyle='--',
alpha=0.5)
plt.savefig(os.path.join(logger.get_dir(), 'figs/traj_%d.png' % b),
dpi=300)
# plt.show()
plt.close()
t = torch.tensor(range(N)).unsqueeze(0).expand(B, -1).to(
torch.get_default_dtype())
y = true_system.observe(t, xs).detach()
# seed for real now
utils.set_rng_seed(seed)
y += ystd * torch.randn_like(y)
# prep system
system = deepcopy(true_system)
true_params = parameters_to_vector(true_system.parameters())
utils.set_rng_seed(seed)
params = true_params * (
(torch.rand_like(true_params) - 0.5) / 5. + 1.) # within 10%
vector_to_parameters(params, system.parameters())
params = list(system.parameters())
# specify smoothing criteria
smoothing_criteria = []
for b in range(B):
obscrit = GaussianObservationCriterion(1.0 * torch.ones(ydim),
t[b:b + 1], y[b:b + 1])
dyncrit = GaussianDynamicsCriterion(1e0 * torch.ones(xdim), t[b:b + 1])
smoothing_criteria.append(GroupSOSCriterion([obscrit, dyncrit]))
smooth_solver_kwargs = {'verbose': 0, 'tr_rho': 0.01}
# specify learning criteria
learning_criteria = [GaussianDynamicsCriterion(1e0 * torch.ones(xdim), t)]
learning_params = [params]
# learning_opts = ['scipy_minimize']
# learner_opt_kwargs = {'method': 'Nelder-Mead', 'tr_rho': 0.1,
# 'options':{'adaptive':True}}
# learner_opt_kwargs = {'method': 'BFGS', 'tr_rho': 0.1,
# 'options':{'disp':True}}
learning_opts = ['torch_minimize']
# learner_opt_kwargs = {
# 'method': 'Adam',
# 'lr': 5e-4,
# 'tr_rho': 0.1,
# 'nepochs': 200,
# 'max_grad_norm': 10.0
# }
learner_opt_kwargs = {'method': 'LBFGS'}
# instantiate CEEM
def ecb(epoch):
params = list(system.parameters())
vparams = parameters_to_vector(params)
error = (vparams - true_params).norm().item()
logger.logkv('test/log10_paramerror', np.log10(error))
return
epoch_callbacks = [ecb]
class Last10Errors:
def __init__(self):
return
last_10_errors = Last10Errors
last_10_errors._arr = []
def tcb(epoch):
with torch.no_grad():
tgt_test_pr = system.step_derivs(t_test, x_test)
error = float(torch.nn.functional.mse_loss(tgt_test_pr, tgt_test))
logger.logkv('test/log10_error', np.log10(error))
last_10_errors._arr.append(np.log10(error))
if len(last_10_errors._arr) > 100:
last_10_errors._arr = last_10_errors._arr[-100:]
l10err = torch.tensor(last_10_errors._arr)
convcrit = float((l10err.min() - l10err.max()).abs())
logger.logkv('test/log10_convcrit', np.log10(convcrit))
if convcrit < 1e-3:
return True
return False
termination_callback = tcb
ecb(-1)
tcb(-1)
logger.dumpkvs()
ceem = CEEM(smoothing_criteria,
learning_criteria,
learning_params,
learning_opts,
epoch_callbacks,
termination_callback,
parallel=min(4, B))
# run CEEM
# x0 = torch.zeros_like(xs)
x0 = xs + torch.randn_like(xs)
ceem.train(xs=x0,
sys=system,
nepochs=5000,
smooth_solver_kwargs=smooth_solver_kwargs,
learner_opt_kwargs=learner_opt_kwargs)
return
def train(seed, logdir, sys_seed, ystd, wstd):
torch.set_default_dtype(torch.float64)
logger.setup(logdir, action='d')
# Number of timesteps in the trajectory
T = 128
n = 3
# Batch size
B = 1
k = 1
utils.set_rng_seed(sys_seed)
true_system = default_lorenz_attractor()
dt = true_system._dt
utils.set_rng_seed(43)
# simulate the system
x0mean = torch.tensor([[-6] * k + [-6] * k + [24.] * k]).unsqueeze(0)
# seed for real now
utils.set_rng_seed(seed)
# Rollout with noise
xs = [x0mean]
xs[0] += 5. * torch.randn_like(xs[0])
with torch.no_grad():
for t in range(T - 1):
xs.append(
true_system.step(torch.tensor([0.] * B), xs[-1]) + wstd * torch.randn_like(xs[-1]))
xs = torch.cat(xs, dim=1)
t = torch.tensor(range(T)).unsqueeze(0).to(torch.get_default_dtype())
y = true_system.observe(t, xs).detach()
y += ystd * torch.randn_like(y) # Observation noise
# prep system
system = deepcopy(true_system)
true_params = parameters_to_vector(true_system.parameters())
params = true_params * ((torch.rand_like(true_params) - 0.5) / 5. + 1.) # within 10%
vector_to_parameters(params, system.parameters())
params = list(system.parameters())
# specify smoothing criteria
B = 1
smoothing_criteria = []
for b in range(B):
obscrit = GaussianObservationCriterion(torch.ones(2), t[b:b + 1], y[b:b + 1])
dyncrit = GaussianDynamicsCriterion(wstd / ystd * torch.ones(3), t[b:b + 1])
smoothing_criteria.append(GroupSOSCriterion([obscrit, dyncrit]))
smooth_solver_kwargs = {'verbose': 0, 'tr_rho': 0.001}
# specify learning criteria
learning_criteria = [GaussianDynamicsCriterion(torch.ones(3), t)]
learning_params = [params]
learning_opts = ['scipy_minimize']
learner_opt_kwargs = {'method': 'Nelder-Mead', 'tr_rho': 0.01}
# instantiate CEEM
def ecb(epoch):
logger.logkv('test/rho', float(system._rho))
logger.logkv('test/sigma', float(system._sigma))
logger.logkv('test/beta', float(system._beta))
logger.logkv('test/rho_pcterr_log10',
float(torch.log10((true_system._rho - system._rho).abs() / true_system._rho)))
logger.logkv(
'test/sigma_pcterr_log10',
float(torch.log10((true_system._sigma - system._sigma).abs() / true_system._sigma)))
logger.logkv(
'test/beta_pcterr_log10',
float(torch.log10((true_system._beta - system._beta).abs() / true_system._beta)))
return
epoch_callbacks = [ecb]
class Last10Errors:
def __init__(self):
return
last_10_errors = Last10Errors
last_10_errors._arr = []
def tcb(epoch):
params = list(system.parameters())
vparams = parameters_to_vector(params)
error = (vparams - true_params).norm().item()
last_10_errors._arr.append(float(error))
logger.logkv('test/log10_error', np.log10(error))
if len(last_10_errors._arr) > 10:
last_10_errors._arr = last_10_errors._arr[-10:]
l10err = torch.tensor(last_10_errors._arr)
convcrit = float((l10err.min() - l10err.max()).abs())
logger.logkv('test/log10_convcrit', np.log10(convcrit))
if convcrit < 1e-4:
return True
return False
termination_callback = tcb
ceem = CEEM(smoothing_criteria, learning_criteria, learning_params, learning_opts,
epoch_callbacks, termination_callback)
# run CEEM
x0 = torch.zeros_like(xs)
ceem.train(xs=x0, sys=system, nepochs=500, smooth_solver_kwargs=smooth_solver_kwargs,
learner_opt_kwargs=learner_opt_kwargs)
return float(system._sigma), float(system._rho), float(system._beta)
def train(seed, logdir, ystd=0.1, wstd=0.01, sys_seed=4):
print('\n\n\n##### SEED %d #####\n\n'%seed)
torch.set_default_dtype(torch.float64)
logger.setup(logdir, action='d')
# Number of timesteps in the trajectory
T = 128
n = 3
# Batch size
B = 4
k = 1
utils.set_rng_seed(sys_seed)
sys = default_lorenz_attractor()
dt = sys._dt
utils.set_rng_seed(seed)
# simulate the system
x0mean = torch.tensor([[-6] * k + [-6] * k + [24.] * k])
x0mean = x0mean.unsqueeze(0).repeat(B,1,1)
# Rollout with noise
Q = (wstd ** 2) * torch.eye(sys.xdim)
R = (ystd ** 2) * torch.eye(sys.ydim)
Px0 = 5.0 * torch.eye(sys.xdim)
Qpdf = MultivariateNormal(torch.zeros((B,1,sys.xdim)), Q.unsqueeze(0).unsqueeze(0))
Rpdf = MultivariateNormal(torch.zeros((B,1,sys.ydim)), R.unsqueeze(0).unsqueeze(0))
Px0pdf = MultivariateNormal(x0mean, Px0.unsqueeze(0).unsqueeze(0))
xs = [Px0pdf.sample()]
ys = [sys.observe(0, xs[0]) + Rpdf.sample()]
for t in range(T-1):
tinp = torch.tensor([t] * B).unsqueeze(1).to(dtype=torch.get_default_dtype())
xs.append(sys.step(tinp, xs[-1]) + Qpdf.sample())
ys.append(sys.observe(tinp, xs[-1]) + Rpdf.sample())
x = torch.cat(xs, dim=1)
y = torch.cat(ys, dim=1)
t = torch.tensor(range(T)).unsqueeze(0).to(torch.get_default_dtype()).repeat(B,1)
m = y.shape[-1]
fig = plt.figure()
for b in range(B):
ax = fig.add_subplot(int(np.ceil(B / 2.)), 2, b + 1, projection='3d')
for k_ in range(k):
plot3d(plt.gca(), x[b, :, k_], x[b, :, k + k_], x[b, :, 2 * k + k_], linestyle='--',
alpha=0.5)
plt.savefig(opj(logdir, 'traintrajs.png'), dpi=300)
# prep system
true_system = sys
system = deepcopy(true_system)
true_params = parameters_to_vector(true_system.parameters())
params = true_params * ((torch.rand_like(true_params) - 0.5) / 5. + 1.) # within 10%
vector_to_parameters(params, system.parameters())
params = list(system.parameters())
# specify smoothing criteria
smoothing_criteria = []
for b in range(B):
obscrit = GaussianObservationCriterion(torch.ones(2), t[b:b + 1], y[b:b + 1])
dyncrit = GaussianDynamicsCriterion(wstd / ystd * torch.ones(3), t[b:b + 1])
smoothing_criteria.append(GroupSOSCriterion([obscrit, dyncrit]))
smooth_solver_kwargs = {'verbose': 0, 'tr_rho': 0.001}
# specify learning criteria
learning_criteria = [GaussianDynamicsCriterion(torch.ones(3), t)]
learning_params = [params]
learning_opts = ['scipy_minimize']
learner_opt_kwargs = {'method': 'Nelder-Mead', 'tr_rho': 0.01}
# instantiate CEEM
timer = {'start_time':timeit.default_timer()}
def ecb(epoch):
logger.logkv('test/rho', float(system._rho))
logger.logkv('test/sigma', float(system._sigma))
logger.logkv('test/beta', float(system._beta))
logger.logkv('test/rho_pcterr_log10',
float(torch.log10((true_system._rho - system._rho).abs() / true_system._rho)))
logger.logkv(
'test/sigma_pcterr_log10',
float(torch.log10((true_system._sigma - system._sigma).abs() / true_system._sigma)))
logger.logkv(
'test/beta_pcterr_log10',
float(torch.log10((true_system._beta - system._beta).abs() / true_system._beta)))
logger.logkv('time/epochtime', timeit.default_timer() - timer['start_time'])
timer['start_time'] = timeit.default_timer()
return
epoch_callbacks = [ecb]
class Last10Errors:
def __init__(self):
return
last_10_errors = Last10Errors
last_10_errors._arr = []
def tcb(epoch):
params = list(system.parameters())
vparams = parameters_to_vector(params)
error = (vparams - true_params).norm().item()
last_10_errors._arr.append(float(error))
logger.logkv('test/log10_error', np.log10(error))
if len(last_10_errors._arr) > 10:
last_10_errors._arr = last_10_errors._arr[-10:]
l10err = torch.tensor(last_10_errors._arr)
convcrit = float((l10err.min() - l10err.max()).abs())
logger.logkv('test/log10_convcrit', np.log10(convcrit))
if convcrit < 1e-4:
return True
return False
termination_callback = tcb
ceem = CEEM(smoothing_criteria, learning_criteria, learning_params, learning_opts,
epoch_callbacks, termination_callback)
# run CEEM
x0 = torch.zeros_like(x)
ecb(-1)
logger.dumpkvs()
ceem.train(xs=x0, sys=system, nepochs=100, smooth_solver_kwargs=smooth_solver_kwargs,
learner_opt_kwargs=learner_opt_kwargs)
return float(system._sigma), float(system._rho), float(system._beta)
def run(seed, lr, method, noise, damped, smoketest=False):
"""
Args:
seed (int): seed
lr (float): init learning rate
method (str): training method in ['qdd', 'nqqd', 'del+mnorm', 'del+logdet']
noise (float): amount of noise in [0.01,0.05, 0.1]
damped (bool): use damped pendulum data
smoketest (bool): if smoketest, runs 2 epochs
"""
torch.set_default_dtype(torch.float64)
dtype = torch.get_default_dtype()
torch.manual_seed(seed)
# load the data
dataset = 'damped_' if damped else ''
noisedict = {
0.01: '0p01',
0.05: '0p05',
0.10: '0p10',
0.20: '0p20',
0.30: '0p30',
0.40: '0p40',
0.50: '0p50',
1.0: '1p0'
}
dataset += 'dubpen_%s_smoothed.td' % noisedict[noise]
dataset = './datasets/' + dataset
data = torch.load('./datasets/%sdubpen_qddot.td' %
('damped_' if damped else ''))
data_ = torch.load(dataset)
dt = 0.05
logdir = 'data/%s_%s_%.1e_%.3f_%d' % ('damped' if damped else 'undamped',
method, lr, noise, seed)
logger.setup(logdir, action='d')
inds = torch.randperm(16)
Btr = 8
Bte = 4
Bva = 4
train_data_ = data_[inds[:Btr]]
test_data_ = data_[inds[Btr:Btr + Bte]]
val_data_ = data_[inds[Btr + Bte:Btr + Bte + Bva]]
train_data = data[inds[:Btr]]
test_data = data[inds[Btr:Btr + Bte]]
val_data = data[inds[Btr + Bte:Btr + Bte + Bva]]
t_, smq, smdq, smddq = train_data_[:]
ttest_, smqtest, smdqtest, smddqtest = test_data_[:]
tval_, smqval, smdqval, smddqval = val_data_[:]
t, q, dq, ddq = train_data[:]
ttest, qtest, dqtest, ddqtest = test_data[:]
tval, qval, dqval, ddqval = val_data[:]
B, T, qdim = q.shape
# create the appropriate dataloader
if 'del' in method:
smq_1 = smq[:, :-2]
smq_2 = smq[:, 1:-1]
smq_3 = smq[:, 2:]
smq_B = torch.stack([smq_1, smq_2, smq_3], dim=2).reshape(-1, 3,
2).detach()
print(smq_B.shape, smq.shape)
dataset = TensorDataset(smq_B)
dataloader = DataLoader(dataset, batch_size=256, shuffle=True)
elif method == 'qdd':
dataset = TensorDataset(smq.reshape(-1, 1, 2), smdq.reshape(-1, 1, 2),
smddq.reshape(-1, 1, 2))
dataloader = DataLoader(dataset, batch_size=256, shuffle=True)
elif method == 'nqqd':
x = torch.cat([smq, smdq], dim=-1)
inp = x[:, :-1]
out = x[:, 1:]
inp = inp.reshape(-1, 1, 4)
out = out.reshape(-1, 1, 4)
dataset = TensorDataset(inp, out)
dataloader = DataLoader(dataset, batch_size=256, shuffle=True)
else:
raise NotImplementedError
# set up logdir and model
if damped:
system = ForcedSMM(qdim=qdim, dt=dt)
else:
system = StructuredMechanicalModel(qdim=qdim, dt=dt)
# create the appropriate closure
def qddcrit(system, smq_, smdq_, smddq_):
ddq_ = system.compute_qddot(smq_, smdq_, create_graph=True)
ddq_loss = torch.nn.functional.mse_loss(ddq_, smddq_)
return ddq_loss
def nqqdcrit(system, inp, out):
out_ = system.step(torch.ones_like(inp)[..., 0], inp)
nqqd_loss = torch.nn.functional.mse_loss(out_, out)
return nqqd_loss
if 'del' in method:
dyncrit = DELCriterion(t_)
if 'logdet' in method:
bc = LogDetBarrierCriterion
bcf = LogDetBarrierCriterion.mineig
else:
bc = MxNormBarrierCriterion
bcf = MxNormBarrierCriterion.mmxnorm
# initialize the barrier criterion, and find an appropriate coefficient between it and DELcrit
lb = bcf(system, smq).detach() * 0.99 # interior point init
barriercrit = bc(lb)
delcrit = DELCriterion(t)
with torch.no_grad():
dyncritloss = dyncrit(system, smq)
barriercritloss = barriercrit(system, smq)
mu = float(dyncritloss /
barriercritloss) # mu makes them ~equal at init
barriercrit = bc(lb, mu=mu, x_override=smq)
crit = GroupCriterion([dyncrit, barriercrit])
elif method == 'qdd':
crit = qddcrit
elif method == 'nqqd':
crit = nqqdcrit
else:
raise NotImplementedError
# setup optimizer, scheduler
opt = torch.optim.Adam(system.parameters(), lr=lr)
sched = torch.optim.lr_scheduler.LambdaLR(opt, lambda k: 500. / (500 + k))
# train
best_val_loss = np.inf
best_val_loss_test_qddot = np.inf
next_params = ptv(system.parameters()).detach()
for epoch in range(2 if smoketest else 500):
# train with SGD
for batch in dataloader:
prev_params = next_params
opt.zero_grad()
loss = crit(system, *batch)
loss.backward()
opt.step()
if 'del' in method:
# check line search
n_ls = 0
while True:
next_params = ptv(system.parameters()).detach()
del_params = next_params - prev_params
with torch.no_grad():
c = crit(system, smq)
if torch.isnan(c):
next_params = prev_params + 0.5 * del_params
vtp(next_params, system.parameters())
n_ls += 1
else:
break
sched.step()
with torch.no_grad():
val_sqmddqloss = qddcrit(system, smqval, smdqval, smddqval)
train_qdd_loss = qddcrit(system, q, dq, ddq)
test_qdd_loss = qddcrit(system, qtest, dqtest, ddqtest)
val_qdd_loss = qddcrit(system, qval, dqval, ddqval)
# select best model using validation error
if val_sqmddqloss < best_val_loss:
best_val_loss = float(val_sqmddqloss)
best_val_loss_test_qddot_loss = float(test_qdd_loss)
torch.save(
system.state_dict(),
os.path.join(logger.get_dir(), 'ckpts', 'best_model.th'))
logger.logkv("train/epoch", epoch)
logger.logkv("train/loss", float(loss))
logger.logkv("train/log10lr",
np.log10(float(opt.param_groups[0]['lr'])))
logger.logkv("eval/val_sqmddqloss", float(val_sqmddqloss))
logger.logkv("eval/train_qdd_loss", float(train_qdd_loss))
logger.logkv("eval/test_qdd_loss", float(test_qdd_loss))
logger.logkv("eval/val_qdd_loss", float(val_qdd_loss))
logger.logkv("eval/best_val_loss", float(best_val_loss))
logger.logkv("eval/best_val_loss_test_qddot_loss",
float(best_val_loss_test_qddot_loss))
logger.dumpkvs()
def train(seed, logdir, sys_seed, k, b):
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
ystd = 0.01
# ystd = 0.
torch.set_default_dtype(torch.float64)
logger.setup(logdir, action='d')
N = 128
n = 3 * k
B = b
true_system = default_lorenz_system(k, obsdif=2)
utils.set_rng_seed(sys_seed)
xdim = true_system.xdim
ydim = true_system.ydim
dt = true_system._dt
x0mean = torch.tensor([[-6] * k + [-6] * k + [24.] * k]).unsqueeze(0)
# simulate true_dynamics over IC distribution
x_test = x0mean.repeat(1024, 1, 1)
x_test += 5.0 * torch.randn_like(x_test)
x_test = x_test.detach()
t_test = torch.zeros(1024, 1)
tgt_test = true_system.step_derivs(t_test, x_test).detach()
Q = (0.01**2) * torch.eye(true_system.xdim)
R = (ystd**2) * torch.eye(true_system.ydim)
Px0 = 2.5**2 * torch.eye(true_system.xdim)
## simulate the true system
xs = [x0mean.repeat(B, 1, 1)]
xs[0] += 2.5 * torch.randn_like(xs[0])
with torch.no_grad():
for t in range(N - 1):
xs.append(true_system.step(torch.tensor([0.] * B), xs[-1]))
xs = torch.cat(xs, dim=1)
fig = plt.figure()
for b in range(B):
ax = fig.add_subplot(int(np.ceil(B / 2.)), 2, b + 1, projection='3d')
for k_ in range(k):
plot3d(plt.gca(),
xs[b, :, k_],
xs[b, :, k + k_],
xs[b, :, 2 * k + k_],
linestyle='--',
alpha=0.5)
plt.savefig(os.path.join(logger.get_dir(), 'figs/traj_%d.png' % b),
dpi=300)
# plt.show()
plt.close()
t = torch.tensor(range(N)).unsqueeze(0).expand(B, -1).to(
torch.get_default_dtype())
y = true_system.observe(t, xs).detach()
# seed for real now
utils.set_rng_seed(seed)
y += ystd * torch.randn_like(y)
# prep system
system = deepcopy(true_system)
true_params = parameters_to_vector(true_system.parameters())
utils.set_rng_seed(seed)
params = true_params * (
(torch.rand_like(true_params) - 0.5) / 5. + 1.) # within 10%
vector_to_parameters(params, system.parameters())
params = list(system.parameters())
Np = 100
fapf = faPF(Np, system, Q, R, Px0)
timer = {'start_time': timeit.default_timer()}
def ecb(epoch):
logger.logkv('time/epoch', epoch)
params = list(system.parameters())
vparams = parameters_to_vector(params)
error = (vparams - true_params).norm().item()
logger.logkv('test/log10_paramerror', np.log10(error))
logger.logkv('time/epochtime',
timeit.default_timer() - timer['start_time'])
timer['start_time'] = timeit.default_timer()
with torch.no_grad():
tgt_test_pr = system.step_derivs(t_test, x_test)
error = float(torch.nn.functional.mse_loss(tgt_test_pr, tgt_test))
logger.logkv('test/log10_error', np.log10(error))
return
epoch_callbacks = [ecb]
ecb(-1)
logger.dumpkvs()
trainer = SAEMTrainer(
fapf,
y,
# gamma_sched=lambda x: HarmonicDecayScheduler(x, a=50.),
gamma_sched=lambda x: 0.2,
max_k=5000,
xlen_cutoff=15,
)
trainer.train(params, callbacks=epoch_callbacks)
return