def test_csa_block_connector():
MockSimulator.setup()
try:
# This creates a block of size (2, 5) with a probability of 0.5; then
# within the block an individual connection has a probability of 0.3
connector = CSAConnector(
csa.block(2, 5) * csa.random(0.5) * csa.random(0.3))
weight = 1.0
delay = 2.0
mock_synapse_info = MockSynapseInfo(MockPopulation(10, "pre"),
MockPopulation(10, "post"), weight,
delay)
connector.set_projection_information(1000.0, mock_synapse_info)
pre_vertex_slice = Slice(0, 10)
post_vertex_slice = Slice(0, 10)
block = connector.create_synaptic_block([pre_vertex_slice], 0,
[post_vertex_slice], 0,
pre_vertex_slice,
post_vertex_slice, 0,
mock_synapse_info)
assert (len(block) >= 0)
assert (all(item["weight"] == 1.0 for item in block))
assert (all(item["delay"] == 2.0 for item in block))
except TypeError:
raise SkipTest("https://github.com/INCF/csa/issues/17")
except RuntimeError:
if sys.version_info >= (3, 7):
raise SkipTest("https://github.com/INCF/csa/issues/16")
raise
def _connect(self):
'''Connect populations.'''
finite_set = csa.cross(xrange(self._N_s), xrange(self._N_t))
if self._fan == 'in':
self._cs = csa.cset(csa.random(fanIn=self._C) * finite_set)
else:
self._cs = csa.cset(csa.random(fanOut=self._C) * finite_set)
def _connect(self):
'''Connect populations.'''
finite_set = csa.cross(xrange(self._N_s), xrange(self._N_t))
if self._fan == 'in':
cs = csa.cset(csa.random(fanIn=self._C) * finite_set)
else:
cs = csa.cset(csa.random(fanOut=self._C) * finite_set)
nest.CGConnect(self._source_pop, self._target_pop, csa.cset(cs))
def csa_example():
cs = csa.cset(csa.random(0.1), 10000.0, 1.0)
pop1 = nest.LayoutNetwork("iaf_neuron", [16])
pop2 = nest.LayoutNetwork("iaf_neuron", [16])
nest.PrintNetwork(10)
nest.CGConnect(pop1, pop2, cs, {"weight": 0, "delay": 1})
pg = nest.Create("poisson_generator", params={"rate": 80000.0})
nest.DivergentConnect(pg, nest.GetLeaves(pop1)[0], 1.2, 1.0)
vm_params = {
"record_to": ["memory"],
"withgid": True,
"withtime": True,
"interval": 0.1
}
vm = nest.Create("voltmeter", params=vm_params)
nest.DivergentConnect(vm, nest.GetLeaves(pop2)[0])
nest.Simulate(50.0)
from nest import visualization
allnodes = pg + nest.GetLeaves(pop1)[0] + nest.GetLeaves(pop2)[0] + vm
visualization.plot_network(allnodes, "test_csa.png")
if havePIL:
im = Image.open("test_csa.png")
im.show()
from nest import voltage_trace
voltage_trace.from_device(vm)
def csa_example():
cs = csa.cset(csa.random(0.1), 10000.0, 1.0)
pop1 = nest.LayoutNetwork("iaf_neuron", [16])
pop2 = nest.LayoutNetwork("iaf_neuron", [16])
nest.PrintNetwork(10)
nest.CGConnect(pop1, pop2, cs, {"weight": 0, "delay": 1})
pg = nest.Create("poisson_generator", params={"rate": 80000.0})
nest.DivergentConnect(pg, nest.GetLeaves(pop1)[0], 1.2, 1.0)
vm_params = {"record_to": ["memory"], "withgid": True,
"withtime": True, "interval": 0.1}
vm = nest.Create("voltmeter", params=vm_params)
nest.DivergentConnect(vm, nest.GetLeaves(pop2)[0])
nest.Simulate(50.0)
from nest import visualization
allnodes = pg + nest.GetLeaves(pop1)[0] + nest.GetLeaves(pop2)[0] + vm
visualization.plot_network(allnodes, "test_csa.png")
if havePIL:
im = Image.open("test_csa.png")
im.show()
from nest import voltage_trace
voltage_trace.from_device(vm)
def test_csa_random_connector():
unittest_setup()
connector = CSAConnector(csa.random(0.05))
weight = 1.0
delay = 2.0
mock_synapse_info = SynapseInformation(
connector=None,
pre_population=MockPopulation(10, "Pre"),
post_population=MockPopulation(10, "Post"),
prepop_is_view=False,
postpop_is_view=False,
rng=None,
synapse_dynamics=None,
synapse_type=None,
is_virtual_machine=False,
weights=weight,
delays=delay)
connector.set_projection_information(mock_synapse_info)
pre_vertex_slice = Slice(0, 10)
post_vertex_slice = Slice(0, 10)
block = connector.create_synaptic_block([pre_vertex_slice],
[post_vertex_slice],
pre_vertex_slice,
post_vertex_slice, 0,
mock_synapse_info)
assert (len(block) >= 0)
assert (all(item["weight"] == 1.0 for item in block))
assert (all(item["delay"] == 2.0 for item in block))
def test_csa_block_connector():
MockSimulator.setup()
# This creates a block of size (2, 5) with a probability of 0.5; then
# within the block an individual connection has a probability of 0.3
connector = CSAConnector(
csa.block(2, 5) * csa.random(0.5) * csa.random(0.3))
connector.set_projection_information(
MockPopulation(10, "pre"), MockPopulation(10, "post"),
MockRNG(), 1000.0)
pre_vertex_slice = Slice(0, 10)
post_vertex_slice = Slice(0, 10)
block = connector.create_synaptic_block(
1.0, 2.0, [pre_vertex_slice], 0, [post_vertex_slice], 0,
pre_vertex_slice, post_vertex_slice, 0)
assert(len(block) >= 0)
assert(all(item["weight"] == 1.0 for item in block))
assert(all(item["delay"] == 2.0 for item in block))
def test_csa_block_connector():
unittest_setup()
try:
# This creates a block of size (2, 5) with a probability of 0.5; then
# within the block an individual connection has a probability of 0.3
connector = CSAConnector(
csa.block(2, 5) * csa.random(0.5) * csa.random(0.3))
weight = 1.0
delay = 2.0
mock_synapse_info = SynapseInformation(
connector=None,
pre_population=MockPopulation(10, "Pre"),
post_population=MockPopulation(10, "Post"),
prepop_is_view=False,
postpop_is_view=False,
rng=None,
synapse_dynamics=None,
synapse_type=None,
receptor_type=None,
is_virtual_machine=False,
synapse_type_from_dynamics=False,
weights=weight,
delays=delay)
connector.set_projection_information(mock_synapse_info)
pre_vertex_slice = Slice(0, 10)
post_vertex_slice = Slice(0, 10)
block = connector.create_synaptic_block([pre_vertex_slice], 0,
[post_vertex_slice], 0,
pre_vertex_slice,
post_vertex_slice, 0,
mock_synapse_info)
assert (len(block) >= 0)
assert (all(item["weight"] == 1.0 for item in block))
assert (all(item["delay"] == 2.0 for item in block))
except TypeError as e:
raise SkipTest("https://github.com/INCF/csa/issues/17") from e
except RuntimeError as e:
if sys.version_info >= (3, 7):
raise SkipTest("https://github.com/INCF/csa/issues/16") from e
raise e
def test_csa_random_connector():
MockSimulator.setup()
connector = CSAConnector(csa.random(0.05))
connector.set_projection_information(
MockPopulation(10, "pre"), MockPopulation(10, "post"),
MockRNG(), 1000.0)
pre_vertex_slice = Slice(0, 10)
post_vertex_slice = Slice(0, 10)
block = connector.create_synaptic_block(
1.0, 2.0, [pre_vertex_slice], 0, [post_vertex_slice], 0,
pre_vertex_slice, post_vertex_slice, 0)
assert(len(block) >= 0)
assert(all(item["weight"] == 1.0 for item in block))
assert(all(item["delay"] == 2.0 for item in block))
def csa_example():
cs = csa.cset(csa.random(0.1), 10000.0, 1.0)
# This does not work yet, as the implementation does not yet
# support nested subnets.
#
#pop1 = nest.LayoutNetwork("iaf_neuron", [4,4])
#pop2 = nest.LayoutNetwork("iaf_neuron", [4,4])
pop1 = nest.LayoutNetwork("iaf_neuron", [16])
pop2 = nest.LayoutNetwork("iaf_neuron", [16])
nest.PrintNetwork(10)
nest.CGConnect(pop1, pop2, cs, {"weight": 0, "delay": 1})
pg = nest.Create("poisson_generator", params={"rate": 80000.0})
nest.DivergentConnect(pg, nest.GetLeaves(pop1)[0], 1.2, 1.0)
vm = nest.Create("voltmeter",
params={
"record_to": ["memory"],
"withgid": True,
"withtime": True,
"interval": 0.1
})
nest.DivergentConnect(vm, nest.GetLeaves(pop2)[0])
nest.Simulate(50.0)
# Not yet supported in NEST
#from nest import visualization
#allnodes = [pg, nest.GetLeaves(pop1)[0], nest.GetLeaves(pop2)[0], vm]
#visualization.plot_network(allnodes, "test_csa.png", "png", plot_modelnames=True
#if havePIL:
# im = Image.open("test_csa.png")
# im.show()
from nest import voltage_trace
voltage_trace.from_device(vm)
def csa_example():
cs = csa.cset(csa.random(0.1), 10000.0, 1.0)
# This does not work yet, as the implementation does not yet
# support nested subnets.
#
# pop1 = nest.LayoutNetwork("iaf_neuron", [4,4])
# pop2 = nest.LayoutNetwork("iaf_neuron", [4,4])
pop1 = nest.LayoutNetwork("iaf_neuron", [16])
pop2 = nest.LayoutNetwork("iaf_neuron", [16])
nest.PrintNetwork(10)
nest.CGConnect(pop1, pop2, cs, {"weight": 0, "delay": 1})
pg = nest.Create("poisson_generator", params={"rate": 80000.0})
nest.DivergentConnect(pg, nest.GetLeaves(pop1)[0], 1.2, 1.0)
vm = nest.Create("voltmeter", params={"record_to": ["memory"], "withgid": True, "withtime": True, "interval": 0.1})
nest.DivergentConnect(vm, nest.GetLeaves(pop2)[0])
nest.Simulate(50.0)
# Not yet supported in NEST
# from nest import visualization
# allnodes = [pg, nest.GetLeaves(pop1)[0], nest.GetLeaves(pop2)[0], vm]
# visualization.plot_network(allnodes, "test_csa.png", "png", plot_modelnames=True
# if havePIL:
# im = Image.open("test_csa.png")
# im.show()
from nest import voltage_trace
voltage_trace.from_device(vm)
print "[%d] Creating populations" % node
n_spikes = int(2 * tstop * input_rate / 1000.0)
spike_times = numpy.add.accumulate(
rng.next(n_spikes, 'exponential', [1000.0 / input_rate], mask_local=False))
input_population = Population(100,
SpikeSourceArray(spike_times=spike_times),
label="input")
output_population = Population(10, IF_curr_exp(**cell_params), label="output")
print "[%d] input_population cells: %s" % (node, input_population.local_cells)
print "[%d] output_population cells: %s" % (node,
output_population.local_cells)
print "[%d] Connecting populations" % node
timer.start()
connector = CSAConnector(csa.random(0.5), weights=0.1)
#connector = CSAConnector(csa.cset(csa.random(0.5), 0.123, 1.6))
projection = Projection(input_population, output_population, connector,
StaticSynapse())
print connector.describe(), timer.elapsedTime()
file_stem = "Results/simpleRandomNetwork_csa_np%d_%s" % (num_processes(),
simulator_name)
projection.save('all', '%s.conn' % file_stem)
input_population.record('spikes')
output_population.record('spikes')
output_population.sample(n_record, rng).record('v')
print "[%d] Running simulation" % node
from time import time
from sys import argv, exit
from pyNN.nest import setup, Population, IF_cond_alpha, CSAConnector, Projection, nest
import csa
if len(argv) != 3:
print "usage: nest_CSAConnector_csa_scaling.py <num_neurons> <num_procs>"
exit()
n = int(argv[1])
np = int(argv[2])
setup(timestep=0.1, min_delay=0.1, max_delay=4.0)
pop = Population(n, IF_cond_alpha, {})
# measure random connectivity
start = time()
cset = csa.random(0.1)
connector = CSAConnector(cset)
proj = Projection(pop, pop, connector)
rank = nest.Rank()
nc = nest.GetKernelStatus("num_connections")
nest.sli_run("preptime"); preptime = nest.sli_pop()
nest.sli_run("itertime"); itertime = nest.sli_pop()
print "nest CSAConnector random(0.1) csa %i %i %f %f %f %i %i" % (n, nc, time() - start, preptime, itertime, rank, np)
#import nest.visualization as vis
#vis.plot_network(pop.all_cells, "nest_CSAConnector_csa_scaling.pdf")
ext_conn = sim.FixedProbabilityConnector(rconn)
ext_syn = sim.StaticSynapse(weight=0.1)
print("%s Initialising membrane potential to random values..." % node_id)
rng = NumpyRNG(seed=rngseed, parallel_safe=parallel_safe)
uniformDistr = RandomDistribution('uniform', low=v_reset, high=v_thresh, rng=rng)
if options.use_views:
all_cells.initialize(v=uniformDistr)
else:
exc_cells.initialize(v=uniformDistr)
inh_cells.initialize(v=uniformDistr)
print("%s Connecting populations..." % node_id)
progress_bar = ProgressBar(width=20)
if options.use_csa:
connector = CSAConnector(csa.cset(csa.random(pconn)))
else:
connector = sim.FixedProbabilityConnector(pconn, rng=rng, callback=progress_bar)
exc_syn = sim.StaticSynapse(weight=w_exc, delay=delay)
inh_syn = sim.StaticSynapse(weight=w_inh, delay=delay)
connections = {}
if options.use_views or options.use_assembly:
connections['exc'] = sim.Projection(exc_cells, all_cells, connector, exc_syn, receptor_type='excitatory')
connections['inh'] = sim.Projection(inh_cells, all_cells, connector, inh_syn, receptor_type='inhibitory')
if (options.benchmark == "COBA"):
connections['ext'] = sim.Projection(ext_stim, all_cells, ext_conn, ext_syn, receptor_type='excitatory')
else:
connections['e2e'] = sim.Projection(exc_cells, exc_cells, connector, exc_syn, receptor_type='excitatory')
connections['e2i'] = sim.Projection(exc_cells, inh_cells, connector, exc_syn, receptor_type='excitatory')
connections['i2e'] = sim.Projection(inh_cells, exc_cells, connector, inh_syn, receptor_type='inhibitory')
'rate': rate,
'duration': stim_dur
},
label="expoisson")
rconn = 0.01
ext_conn = FixedProbabilityConnector(rconn, weights=0.1)
print "%s Initialising membrane potential to random values..." % node_id
rng = NumpyRNG(seed=rngseed, parallel_safe=parallel_safe)
uniformDistr = RandomDistribution('uniform', [v_reset, v_thresh], rng=rng)
all_cells.initialize('v', uniformDistr)
print "%s Connecting populations..." % node_id
#exc_conn = FixedProbabilityConnector(pconn, weights=w_exc, delays=delay)
#inh_conn = FixedProbabilityConnector(pconn, weights=w_inh, delays=delay)
exc_conn = CSAConnector(csa.cset(csa.random(pconn), w_exc, delay))
inh_conn = CSAConnector(csa.cset(csa.random(pconn), w_inh, delay))
connections = {}
connections['exc'] = Projection(exc_cells,
all_cells,
exc_conn,
target='excitatory',
rng=rng)
connections['inh'] = Projection(inh_cells,
all_cells,
inh_conn,
target='inhibitory',
rng=rng)
if (benchmark == "COBA"):
connections['ext'] = Projection(ext_stim,
def do_run(plot):
runtime = 3000
p.setup(timestep=1.0, min_delay=1.0, max_delay=144.0)
nNeurons = 200 # number of neurons in each population
p.set_number_of_neurons_per_core(p.IF_curr_exp, nNeurons / 10)
cell_params_lif = {
'cm': 0.25,
'i_offset': 0.0,
'tau_m': 20.0,
'tau_refrac': 2.0,
'tau_syn_E': 5.0,
'tau_syn_I': 5.0,
'v_reset': -70.0,
'v_rest': -65.0,
'v_thresh': -50.0
}
populations = list()
projections = list()
weight_to_spike = 2.0
delay = 10
# connection list in a loop for first population
loopConnections = []
for i in range(0, nNeurons):
singleConnection = ((i, (i + 1) % nNeurons))
loopConnections.append(singleConnection)
# injection list to set the chain going
injectionConnection = [(0, 0)]
spikeArray = {'spike_times': [[0]]}
# list of populations
populations.append(
p.Population(nNeurons, p.IF_curr_exp(**cell_params_lif),
label='pop_1'))
populations.append(
p.Population(nNeurons, p.IF_curr_exp(**cell_params_lif),
label='pop_2'))
populations.append(
p.Population(nNeurons, p.IF_curr_exp(**cell_params_lif),
label='pop_3'))
populations.append(
p.Population(nNeurons, p.IF_curr_exp(**cell_params_lif),
label='pop_4'))
populations.append(
p.Population(1,
p.SpikeSourceArray(**spikeArray),
label='inputSpikes_1'))
# Loop connector: we can just pass in the list we made earlier
CSA_loop_connector = p.CSAConnector(loopConnections)
# random connector: each connection has a probability of 0.05
CSA_random_connector = p.CSAConnector(csa.random(0.05))
# one-to-one connector: do I really need to explain?
CSA_onetoone_connector = p.CSAConnector(csa.oneToOne)
# This creates a block of size (5,10) with a probability of 0.05; then
# within the block an individual connection has a probability of 0.3
csa_block_random = csa.block(15, 10) * csa.random(0.05) * csa.random(0.3)
CSA_randomblock_connector = p.CSAConnector(csa_block_random)
# list of projections using the connectors above
projections.append(
p.Projection(populations[0], populations[0], CSA_loop_connector,
p.StaticSynapse(weight=weight_to_spike, delay=delay)))
projections.append(
p.Projection(populations[0], populations[1], CSA_random_connector,
p.StaticSynapse(weight=weight_to_spike, delay=delay)))
projections.append(
p.Projection(populations[1], populations[2], CSA_onetoone_connector,
p.StaticSynapse(weight=weight_to_spike, delay=delay)))
projections.append(
p.Projection(populations[2], populations[3], CSA_randomblock_connector,
p.StaticSynapse(weight=weight_to_spike, delay=delay)))
projections.append(
p.Projection(populations[4], populations[0],
p.FromListConnector(injectionConnection),
p.StaticSynapse(weight=weight_to_spike, delay=1)))
populations[0].record(['v', 'spikes'])
populations[1].record(['v', 'spikes'])
populations[2].record(['v', 'spikes'])
populations[3].record(['v', 'spikes'])
p.run(runtime)
# get data (could be done as one, but can be done bit by bit as well)
v = populations[0].spinnaker_get_data('v')
v2 = populations[1].spinnaker_get_data('v')
v3 = populations[2].spinnaker_get_data('v')
v4 = populations[3].spinnaker_get_data('v')
spikes = populations[0].spinnaker_get_data('spikes')
spikes2 = populations[1].spinnaker_get_data('spikes')
spikes3 = populations[2].spinnaker_get_data('spikes')
spikes4 = populations[3].spinnaker_get_data('spikes')
if plot:
# Use the show functionality of CSA to display connection sets
CSA_loop_connector.show_connection_set()
CSA_random_connector.show_connection_set()
CSA_onetoone_connector.show_connection_set()
CSA_randomblock_connector.show_connection_set()
# Now plot some spikes
pylab.figure()
pylab.plot([i[1] for i in spikes], [i[0] for i in spikes], "r.")
pylab.xlabel('Time/ms')
pylab.ylabel('spikes')
pylab.title('spikes: population 1')
pylab.show()
pylab.figure()
pylab.plot([i[1] for i in spikes3], [i[0] for i in spikes3], "g.")
pylab.plot([i[1] for i in spikes4], [i[0] for i in spikes4], "r.")
pylab.plot([i[1] for i in spikes2], [i[0] for i in spikes2], "b.")
pylab.xlabel('Time/ms')
pylab.ylabel('spikes')
pylab.title('spikes: populations 2, 3, 4')
pylab.show()
p.end()
return v, v2, v3, v4, spikes, spikes2, spikes3, spikes4
rng = NumpyRNG(seed=seed, parallel_safe=True)
print "[%d] Creating populations" % node
n_spikes = int(2*tstop*input_rate/1000.0)
spike_times = numpy.add.accumulate(rng.next(n_spikes, 'exponential',
[1000.0/input_rate], mask_local=False))
input_population = Population(100, SpikeSourceArray(spike_times=spike_times), label="input")
output_population = Population(10, IF_curr_exp(**cell_params), label="output")
print "[%d] input_population cells: %s" % (node, input_population.local_cells)
print "[%d] output_population cells: %s" % (node, output_population.local_cells)
print "[%d] Connecting populations" % node
timer.start()
connector = CSAConnector(csa.random(0.5), weights=0.1)
#connector = CSAConnector(csa.cset(csa.random(0.5), 0.123, 1.6))
projection = Projection(input_population, output_population, connector, StaticSynapse())
print connector.describe(), timer.elapsedTime()
file_stem = "Results/simpleRandomNetwork_csa_np%d_%s" % (num_processes(), simulator_name)
projection.save('all', '%s.conn' % file_stem)
input_population.record('spikes')
output_population.record('spikes')
output_population.sample(n_record, rng).record('v')
print "[%d] Running simulation" % node
run(tstop)
def _connect(self):
'''Connect populations.'''
finite_set = csa.cross(xrange(self._N_s), xrange(self._N_t))
self._cs = csa.cset(csa.random(p=self._p) * finite_set)
import csa
haveCSA = True
except ImportError:
print(
"This example requires CSA to be installed in order to run.\n" +
"Please make sure you compiled NEST using --with-libneurosim=PATH\n" +
"and CSA and libneurosim are available from PYTHONPATH.")
import sys
sys.exit()
"""
To set up the connectivity, We create a ``random`` connection set
with a probability of 0.1 and two associated values (10000.0 and 1.0)
used as weight and delay, respectively.
"""
cs = csa.cset(csa.random(0.1), 10000.0, 1.0)
"""
Using the `Create` command from PyNEST, we create the neurons of
the pre- and postsynaptic populations, each of which containing 16
neurons.
"""
pre = nest.Create("iaf_neuron", 16)
post = nest.Create("iaf_neuron", 16)
"""
We can now connect the populations using the `CGConnect` function.
It takes the IDs of pre- and postsynaptic neurons (``pre`` and
``post``), the connection set (``cs``) and a dictionary that maps
the parameters weight and delay to positions in the value set
associated with the connection set.
"""
rng = NumpyRNG(seed=seed, parallel_safe=True)
print "[%d] Creating populations" % node
n_spikes = int(2*tstop*input_rate/1000.0)
spike_times = numpy.add.accumulate(rng.next(n_spikes, 'exponential',
{'beta': 1000.0/input_rate}, mask_local=False))
input_population = Population(100, SpikeSourceArray(spike_times=spike_times), label="input")
output_population = Population(10, IF_curr_exp(**cell_params), label="output")
print "[%d] input_population cells: %s" % (node, input_population.local_cells)
print "[%d] output_population cells: %s" % (node, output_population.local_cells)
print "[%d] Connecting populations" % node
timer.start()
connector = CSAConnector(csa.random(0.5))
syn = StaticSynapse(weight=0.1)
projection = Projection(input_population, output_population, connector, syn)
print connector.describe(), timer.elapsedTime()
file_stem = "Results/simpleRandomNetwork_csa_np%d_%s" % (num_processes(), simulator_name)
projection.save('all', '%s.conn' % file_stem)
input_population.record('spikes')
output_population.record('spikes')
output_population.sample(n_record, rng).record('v')
print "[%d] Running simulation" % node
run(tstop)
rng = NumpyRNG(seed=seed, parallel_safe=True)
print("[%d] Creating populations" % node)
n_spikes = int(2 * tstop * input_rate / 1000.0)
spike_times = numpy.add.accumulate(rng.next(n_spikes, 'exponential',
{'beta': 1000.0 / input_rate}, mask_local=False))
input_population = Population(100, SpikeSourceArray(spike_times=spike_times), label="input")
output_population = Population(10, IF_curr_exp(**cell_params), label="output")
print("[%d] input_population cells: %s" % (node, input_population.local_cells))
print("[%d] output_population cells: %s" % (node, output_population.local_cells))
print("[%d] Connecting populations" % node)
timer.start()
connector = CSAConnector(csa.random(0.5))
syn = StaticSynapse(weight=0.1)
projection = Projection(input_population, output_population, connector, syn)
print(connector.describe(), timer.elapsedTime())
file_stem = "Results/simpleRandomNetwork_csa_np%d_%s" % (num_processes(), simulator_name)
projection.save('all', '%s.conn' % file_stem)
input_population.record('spikes')
output_population.record('spikes')
output_population.sample(n_record, rng).record('v')
print("[%d] Running simulation" % node)
run(tstop)
import csa
haveCSA = True
except ImportError:
print("This example requires CSA to be installed in order to run.\n"
+ "Please make sure you compiled NEST using --with-libneurosim=PATH\n"
+ "and CSA and libneurosim are available from PYTHONPATH.")
import sys
sys.exit()
"""
To set up the connectivity, We create a ``random`` connection set
with a probability of 0.1 and two associated values (10000.0 and 1.0)
used as weight and delay, respectively.
"""
cs = csa.cset(csa.random(0.1), 10000.0, 1.0)
"""
Using the `Create` command from PyNEST, we create the neurons of
the pre- and postsynaptic populations, each of which containing 16
neurons.
"""
pre = nest.Create("iaf_neuron", 16)
post = nest.Create("iaf_neuron", 16)
"""
We can now connect the populations using the `CGConnect` function.
It takes the IDs of pre- and postsynaptic neurons (``pre`` and
``post``), the connection set (``cs``) and a dictionary that maps
the parameters weight and delay to positions in the value set
exc_cells = all_cells[:n_exc]
inh_cells = all_cells[n_exc:]
if benchmark == "COBA":
ext_stim = Population(20, SpikeSourcePoisson, {'rate' : rate, 'duration' : stim_dur}, label="expoisson")
rconn = 0.01
ext_conn = FixedProbabilityConnector(rconn, weights=0.1)
print "%s Initialising membrane potential to random values..." % node_id
rng = NumpyRNG(seed=rngseed, parallel_safe=parallel_safe)
uniformDistr = RandomDistribution('uniform', [v_reset,v_thresh], rng=rng)
all_cells.initialize('v', uniformDistr)
print "%s Connecting populations..." % node_id
#exc_conn = FixedProbabilityConnector(pconn, weights=w_exc, delays=delay)
#inh_conn = FixedProbabilityConnector(pconn, weights=w_inh, delays=delay)
exc_conn = CSAConnector(csa.cset (csa.random (pconn), w_exc, delay))
inh_conn = CSAConnector(csa.cset (csa.random (pconn), w_inh, delay))
connections={}
connections['exc'] = Projection(exc_cells, all_cells, exc_conn, target='excitatory', rng=rng)
connections['inh'] = Projection(inh_cells, all_cells, inh_conn, target='inhibitory', rng=rng)
if (benchmark == "COBA"):
connections['ext'] = Projection(ext_stim, all_cells, ext_conn, target='excitatory')
# === Setup recording ==========================================================
print "%s Setting up recording..." % node_id
all_cells.record()
vrecord_list = [exc_cells[0],exc_cells[1]]
exc_cells.record_v(vrecord_list)
buildCPUTime = timer.diff()
def _connect(self):
'''Connect populations.'''
finite_set = csa.cross(xrange(self._N_s), xrange(self._N_t))
cs = csa.cset(csa.random(p=self._p) * finite_set)
nest.CGConnect(self._source_pop, self._target_pop, csa.cset(cs))
print("%s Initialising membrane potential to random values..." % node_id)
rng = NumpyRNG(seed=rngseed, parallel_safe=parallel_safe)
uniformDistr = RandomDistribution('uniform',
low=v_reset,
high=v_thresh,
rng=rng)
if options.use_views:
all_cells.initialize(v=uniformDistr)
else:
exc_cells.initialize(v=uniformDistr)
inh_cells.initialize(v=uniformDistr)
print("%s Connecting populations..." % node_id)
progress_bar = ProgressBar(width=20)
if options.use_csa:
connector = sim.CSAConnector(csa.cset(csa.random(pconn)))
else:
connector = sim.FixedProbabilityConnector(pconn,
rng=rng,
callback=progress_bar)
exc_syn = sim.StaticSynapse(weight=w_exc, delay=delay)
inh_syn = sim.StaticSynapse(weight=w_inh, delay=delay)
connections = {}
if options.use_views or options.use_assembly:
connections['exc'] = sim.Projection(exc_cells,
all_cells,
connector,
exc_syn,
receptor_type='excitatory')
connections['inh'] = sim.Projection(inh_cells,
ext_stim = Population(20, SpikeSourcePoisson(rate=rate, duration=stim_dur), label="expoisson")
rconn = 0.01
ext_conn = FixedProbabilityConnector(rconn)
syn = StaticSynapse(weight=0.1)
print "%s Initialising membrane potential to random values..." % node_id
rng = NumpyRNG(seed=rngseed, parallel_safe=parallel_safe)
uniformDistr = RandomDistribution('uniform', low=v_reset, high=v_thresh, rng=rng)
all_cells.initialize(v=uniformDistr)
print "%s Connecting populations..." % node_id
#exc_conn = FixedProbabilityConnector(pconn, weights=w_exc, delays=delay)
#inh_conn = FixedProbabilityConnector(pconn, weights=w_inh, delays=delay)
exc_syn = StaticSynapse(weight=w_exc, delay=delay)
inh_syn = StaticSynapse(weight=w_inh, delay=delay)
exc_conn = CSAConnector(csa.cset (csa.random (pconn)))
inh_conn = CSAConnector(csa.cset (csa.random (pconn)))
connections={}
connections['exc'] = Projection(exc_cells, all_cells, exc_conn, exc_syn, receptor_type='excitatory')
connections['inh'] = Projection(inh_cells, all_cells, inh_conn, inh_syn, receptor_type='inhibitory')
if (benchmark == "COBA"):
connections['ext'] = Projection(ext_stim, all_cells, ext_conn, syn, receptor_type='excitatory')
# === Setup recording ==========================================================
print "%s Setting up recording..." % node_id
all_cells.record('spikes')
exc_cells[0:2].record('v')
buildCPUTime = timer.diff()
print "Process with rank %d running on %s" % (node, socket.gethostname())
rng = NumpyRNG(seed=seed, parallel_safe=True)
print "[%d] Creating populations" % node
n_spikes = int(2*tstop*input_rate/1000.0)
spike_times = numpy.add.accumulate(rng.next(n_spikes, 'exponential',
[1000.0/input_rate], mask_local=False))
input_population = Population(10, SpikeSourceArray, {'spike_times': spike_times }, label="input")
output_population = Population(10, IF_curr_exp, cell_params, label="output")
g=csa.grid2d(3)
d=csa.euclidMetric2d(g,g)
connector = CSAConnector(csa.cset(csa.random(0.5), csa.gaussian(0.1,1.0)*d, 1.0))
projection = Projection(input_population, output_population, connector, rng=rng)
file_stem = "Results/simpleRandomNetwork_np%d_%s" % (num_processes(), simulator_name)
projection.saveConnections('%s.conn' % file_stem)
output_population.record_v()
print "[%d] Running simulation" % node
run(tstop)
print "[%d] Writing Vm to disk" % node
output_population.print_v('%s.v' % file_stem)
print "[%d] Finishing" % node