def create_connectivity(self, conn_type):
"""
This function (re-) creates the network connectivity.
"""
# distribute the cell ids among involved processes
(n_src, n_tgt, self.tp_src, self.tp_tgt) = utils.resolve_src_tgt_with_tp(conn_type, self.params)
print 'Connect anisotropic %s - %s' % (conn_type[0].capitalize(), conn_type[1].capitalize())
gid_tgt_min, gid_tgt_max = utils.distribute_n(n_tgt, self.n_proc, self.pc_id)
print 'Process %d deals with target GIDS %d - %d' % (self.pc_id, gid_tgt_min, gid_tgt_max)
gid_src_min, gid_src_max = utils.distribute_n(n_src, self.n_proc, self.pc_id)
print 'Process %d deals with source GIDS %d - %d' % (self.pc_id, gid_src_min, gid_src_max)
n_my_tgts = gid_tgt_max - gid_tgt_min
# data structure for connection storage
self.target_adj_list = [ [] for i in xrange(n_my_tgts)]
n_src_cells_per_neuron = int(round(self.params['p_%s' % conn_type] * n_src))
# compute all pairwise connection probabilities
for i_, tgt in enumerate(range(gid_tgt_min, gid_tgt_max)):
if (i_ % 20) == 0:
print '%.2f percent complete' % (i_ / float(n_my_tgts) * 100.)
p = np.zeros(n_src)
latency = np.zeros(n_src)
for src in xrange(n_src):
if conn_type[0] == conn_type[1]: # no self-connection
if (src != tgt):
p[src], latency[src] = CC.get_p_conn(self.tp_src[src, :], self.tp_tgt[tgt, :], params['w_sigma_x'], params['w_sigma_v'], params['connectivity_radius'])
else: # different populations --> same indices mean different cells, no check for src != tgt
p[src], latency[src] = CC.get_p_conn(self.tp_src[src, :], self.tp_tgt[tgt, :], params['w_sigma_x'], params['w_sigma_v'], params['connectivity_radius'])
# sort connection probabilities and select remaining connections
sorted_indices = np.argsort(p)
if conn_type[0] == 'e':
sources = sorted_indices[-n_src_cells_per_neuron:]
else:
if conn_type == 'ii':
sources = sorted_indices[1:n_src_cells_per_neuron+1] # shift indices to avoid self-connection, because p_ii = .0
else:
sources = sorted_indices[:n_src_cells_per_neuron]
w = (self.params['w_tgt_in_per_cell_%s' % conn_type] / p[sources].sum()) * p[sources]
for i in xrange(len(sources)):
if w[i] > self.params['w_thresh_connection']:
delay = min(max(latency[sources[i]] * self.params['delay_scale'], self.params['delay_range'][0]), self.params['delay_range'][1]) # map the delay into the valid range
# create adjacency list for all local cells and store connection in class container
self.target_adj_list[i_].append(sources[i])
# communicate the resulting target_adj_list to the root process
self.send_list_to_root(self.target_adj_list)
def __init__(self, params, comm=None):
self.params = params
self.comm = comm
self.n_speeds = params["n_speeds"]
self.n_cycles = params["n_cycles"]
self.n_directions = params["n_theta"]
self.n_iterations_total = (
self.params["n_theta"]
* self.params["n_speeds"]
* self.params["n_cycles"]
* self.params["n_stim_per_direction"]
)
self.selected_conns = None
self.n_time_steps = self.params["t_sim"] / self.params["dt_rate"]
# distribute units among processors
if comm != None:
self.pc_id, self.n_proc = comm.rank, comm.size
my_units = utils.distribute_n(params["n_exc"], self.n_proc, self.pc_id)
self.my_units = range(my_units[0], my_units[1])
else:
self.my_units = range(self.params["n_exc"])
self.pc_id, self.n_proc = 0, 1
try:
self.tuning_prop = np.loadtxt(self.params["tuning_prop_means_fn"])
except:
print "Tuning properties file not found: %s\n Will create new ones" % self.params["tuning_prop_means_fn"]
self.tuning_prop = utils.set_tuning_prop(self.params, mode="hexgrid", cell_type="exc")
np.savetxt(self.params["tuning_prop_means_fn"], self.tuning_prop)
if comm != None:
comm.barrier()
self.initial_value = 1e-2 # should be around 1 / n_units per HC, i.e. 1. / (params['N_theta'] * params['N_V']
self.eps = 0.1 * self.initial_value
self.normalize = False # normalize input within a 'hypercolumn'
all_conns = []
# distribute connections among processors
for i in xrange(params["n_exc"]):
for j in xrange(params["n_exc"]):
if i != j:
all_conns.append((i, j))
self.my_conns = utils.distribute_list(all_conns, n_proc, pc_id)
# setup data structures
self.my_conns = np.array(self.my_conns)
np.savetxt("delme_my_conns_%d.txt" % self.pc_id, self.my_conns, fmt="%d\t%d")
self.pre_ids = np.unique(self.my_conns[:, 0])
self.post_ids = np.unique(self.my_conns[:, 1])
self.gid_idx_map_pre = {}
self.gid_idx_map_post = {}
for i in xrange(self.pre_ids.size):
self.gid_idx_map_pre[self.pre_ids[i]] = i
for i in xrange(self.post_ids.size):
self.gid_idx_map_post[self.post_ids[i]] = i
self.my_selected_conns = []
def set_my_gids(self, cell_type):
"""
If run on multiple cores, distribute the GIDs among the processes
"""
gid_min, gid_max = utils.distribute_n(self.params['n_%s' % cell_type],
self.n_proc, self.pc_id)
self.my_gids[cell_type] = (gid_min +
self.params['%s_offset' % cell_type],
gid_max +
self.params['%s_offset' % cell_type])
def compute_weights_convergence_constrained(tuning_prop, params, comm=None):
"""
This function computes for each target the X % of source cells which have the highest
connection probability to the target cell.
Arguments:
tuning_prop: 2 dimensional array with shape (n_cells, 4)
tp[:, 0] : x-position
tp[:, 1] : y-position
tp[:, 2] : u-position (speed in x-direction)
tp[:, 3] : v-position (speed in y-direction)
"""
if comm != None:
pc_id, n_proc = comm.rank, comm.size
comm.barrier()
else:
pc_id, n_proc = 0, 1
gid_min, gid_max = utils.distribute_n(params['n_exc'], n_proc, pc_id)
sigma_x, sigma_v = params['w_sigma_x'], params['w_sigma_v'] # small sigma values let p and w shrink
(delay_min, delay_max) = params['delay_range']
output_fn = params['conn_list_ee_conv_constr_fn_base'] + 'pid%d.dat' % (pc_id)
print "Proc %d computes initial weights for gids (%d, %d) to file %s" % (pc_id, gid_min, gid_max, output_fn)
conn_file = open(output_fn, 'w')
my_cells = range(gid_min, gid_max)
n_src_cells = round(params['p_ee'] * params['n_exc']) # number of sources per target neuron
output = np.zeros((len(my_cells), n_src_cells+1), dtype='int')
weights = np.zeros((len(my_cells), n_src_cells+1), dtype='int')
output = ''
cnt = 0
for tgt in my_cells:
p = np.zeros(params['n_exc'])
latency = np.zeros(params['n_exc'])
for src in xrange(params['n_exc']):
if (src != tgt):
p[src], latency[src] = get_p_conn(tuning_prop[src, :], tuning_prop[tgt, :], sigma_x, sigma_v, self.params['connectivity_radius'])
sorted_indices = np.argsort(p)
sources = sorted_indices[-params['n_src_cells_per_neuron']:]
w = params['w_tgt_in'] / p[sources].sum() * p[sources]
# w = utils.linear_transformation(w, params['w_min'], params['w_max'])
for i in xrange(len(sources)):
# w[i] = max(params['w_min'], min(w[i], params['w_max']))
src = sources[i]
delay = min(max(latency[src], delay_min), delay_max) # map the delay into the valid range
d_ij = utils.euclidean(tuning_prop[src, :], tuning_prop[tgt, :])
output += '%d\t%d\t%.2e\t%.2e\t%.2e\n' % (src, tgt, w[i], delay, d_ij)
cnt += 1
print 'PID %d Writing %d connections to file: %s' % (pc_id, cnt, output_fn)
conn_file.write(output)
conn_file.close()
if (comm != None):
comm.barrier()
def prepare_spiketrains(self, tuning_prop):
if (type(tuning_prop) == type('')):
# try:
tp = np.loadtxt(tuning_prop)
# except:
# print 'Pid %d fails to load the file ...' % self.pc_id
# tp = self.prepare_tuning_prop(self.params)
elif (type(tuning_prop) == type(np.array([]))):
tp = tuning_prop
else:
raise TypeError, 'Only filename or numpy array accepted for tuning_prop, given %s' % (str(type(tuning_prop)))
my_units = utils.distribute_n(self.params['n_exc'], self.n_proc, self.pc_id)
input_spike_trains = utils.create_spike_trains_for_motion(tp, self.params, contrast=.9, my_units=my_units) # write to paths defined in the params dictionary
if self.comm != None:
self.comm.barrier() #
if len(sys.argv) > 1:
if sys.argv[1] == 'full':
full_system = True
tau_dict = {'tau_zi' : 50., 'tau_zj' : 5.,
'tau_ei' : 50., 'tau_ej' : 50., 'tau_eij' : 50.,
'tau_pi' : 500., 'tau_pj' : 500., 'tau_pij' : 500.,
}
PS = simulation_parameters.parameter_storage()
params = PS.params
PS.create_folders()
PS.write_parameters_to_file()
n_cells = params['n_exc']
my_units = utils.distribute_n(n_cells, n_proc, pc_id)
mp = params['motion_params']
# P R E P A R E T U N I N G P R O P E R T I E S
tuning_prop = utils.set_tuning_prop(params, mode='hexgrid', v_max=params['v_max'])
np.savetxt(params['tuning_prop_means_fn'],tuning_prop)
#exit(1)
# load
#tuning_prop = np.loadtxt(params['tuning_prop_means_fn'])
# P R E P A R E I N P U T
#prepare_input(tuning_prop, params, my_units)
#if comm != None:
# comm.barrier()
print 'n_cells=%d\tn_exc=%d\tn_inh=%d' % (params['n_cells'], params['n_exc'], params['n_inh'])
print 'Blur', params['blur_X'], params['blur_V']
scale_input_frequency = False
if scale_input_frequency:
scaling_factor = utils.scale_input_frequency(params['blur_X'])
params['f_max_stim'] *= scaling_factor
try:
from mpi4py import MPI
USE_MPI = True
comm = MPI.COMM_WORLD
pc_id, n_proc = comm.rank, comm.size
print "USE_MPI:", USE_MPI, 'pc_id, n_proc:', pc_id, n_proc
except:
USE_MPI = False
pc_id, n_proc, comm = 0, 1, None
print "MPI not used"
try:
tuning_prop = np.loadtxt(params['tuning_prop_means_fn'])
except:
print 'File with tuning properties missing: %s\nPlease run: \nmpirun -np [N] python prepare_tuning_prop.py\nOR\npython prepare_tuning_prop.py' % params['tuning_prop_means_fn']
exit(1)
my_units = utils.distribute_n(params['n_exc'], n_proc, pc_id)
utils.create_spike_trains_for_motion(tuning_prop, params, contrast=.9, my_units=my_units, seed=seed) # write to paths defined in the params dictionary
if comm != None:
comm.barrier()
def bcpnn_offline_noColumns(params, conn_list, sim_cnt=0, save_all=False, comm=None):
"""
This function computes the weight and bias values based on spiketimes during the simulation.
Arguments:
params: parameter dictionary
conn_list: two-dim numpy array storing cell-to-cell connections (only non-zero elements will be processed)
in the format (src, tgt, weight, delay)
or
file name in which the date is stored in this way
sim_cnt: int for recording to file
save_all: if True all traces will be saved
comm = MPI communicator
"""
if (type(conn_list) == type('')):
d = np.load(conn_list)
if (comm != None):
pc_id, n_proc = comm.rank, comm.size
else:
pc_id, n_proc = 0, 1
# extract the local list of elements 'my_conns' from the global conn_list
n_total = len(conn_list)
(min_id, max_id) = utils.distribute_n(n_total, n_proc, pc_id)
my_conns = [(conn_list[i, 0], conn_list[i, 1], conn_list[i, 2], conn_list[i, 3]) for i in xrange(min_id, max_id)]
fn = params['exc_spiketimes_fn_merged'] + str(sim_cnt) + '.ras'
spklist = nts.load_spikelist(fn)#, range(params['n_exc_per_mc']), t_start=0, t_stop=params['t_sim'])
spiketrains = spklist.spiketrains
new_conn_list = np.zeros((len(my_conns), 4)) # (src, tgt, weight, delay)
bias_dict = {}
for i in xrange(params['n_exc']):
bias_dict[i] = None
for i in xrange(len(my_conns)):
# for i in xrange(2):
pre_id = my_conns[i][0]
post_id = my_conns[i][1]
# create traces from spiketimes
# pre
spiketimes_pre = spiketrains[pre_id+1.].spike_times
pre_trace = utils.convert_spiketrain_to_trace(spiketimes_pre, params['t_sim'] + 1) # + 1 is to handle spikes in the last time step
# post
spiketimes_post = spiketrains[post_id+1.].spike_times
post_trace = utils.convert_spiketrain_to_trace(spiketimes_post, params['t_sim'] + 1) # + 1 is to handle spikes in the last time step
# compute
# print "%d Computing traces for %d -> %d; %.2f percent " % (pc_id, pre_id, post_id, i / float(len(my_conns)) * 100.)
get_traces = save_all
if (get_traces):
wij, bias, pi, pj, pij, ei, ej, eij, zi, zj = get_spiking_weight_and_bias(pre_trace, post_trace, get_traces)
dw = (wij.max() - wij.min()) * params['dw_scale']
# bias update
new_bias = bias.max()
else:
dw, new_bias = get_spiking_weight_and_bias(pre_trace, post_trace, get_traces)
dw *= params['dw_scale']
# bias update
if bias_dict[post_id] == None:
bias_dict[post_id] = new_bias
# weight update
new_conn_list[i, 0] = pre_id
new_conn_list[i, 1] = post_id
new_conn_list[i, 2] = dw + my_conns[i][2]
new_conn_list[i, 3] = my_conns[i][3]
# print "DEBUG Pc %d \t%d\t%d\t%.1e\t%.1e\tbias:%.4e\tconn:" % (pc_id, new_conn_list[i, 0], new_conn_list[i, 1], new_conn_list[i, 2], new_conn_list[i, 3], new_bias[i, 1]), my_conns[i]
if (save_all):
# save
output_fn = params['weights_fn_base'] + "%d_%d.npy" % (pre_id, post_id)
np.save(output_fn, wij)
output_fn = params['bias_fn_base'] + "%d.npy" % (post_id)
np.save(output_fn, bias)
output_fn = params['ztrace_fn_base'] + "%d.npy" % pre_id
np.save(output_fn, zi)
output_fn = params['ztrace_fn_base'] + "%d.npy" % post_id
np.save(output_fn, zj)
output_fn = params['etrace_fn_base'] + "%d.npy" % pre_id
np.save(output_fn, ei)
output_fn = params['etrace_fn_base'] + "%d.npy" % post_id
np.save(output_fn, ej)
output_fn = params['etrace_fn_base'] + "%d_%d.npy" % (pre_id, post_id)
np.save(output_fn, eij)
output_fn = params['ptrace_fn_base'] + "%d.npy" % pre_id
np.save(output_fn, pi)
output_fn = params['ptrace_fn_base'] + "%d.npy" % post_id
np.save(output_fn, pj)
output_fn = params['ptrace_fn_base'] + "%d_%d.npy" % (pre_id, post_id)
np.save(output_fn, pij)
if (n_proc > 1):
output_fn_conn_list = params['conn_list_ee_fn_base'] + str(sim_cnt+1) + '.dat'
utils.gather_conn_list(comm, new_conn_list, n_total, output_fn_conn_list)
output_fn_bias = params['bias_values_fn_base'] + str(sim_cnt+1) + '.dat'
utils.gather_bias(comm, bias_dict, n_total, output_fn_bias)
else:
print "Debug saving to", params['conn_list_ee_fn_base'] + str(sim_cnt+1) + '.dat'
np.savetxt(params['conn_list_ee_fn_base'] + str(sim_cnt+1) + '.dat', my_conns)#conn_list)
print "Debug saving to", params['bias_values_fn_base'] + str(sim_cnt+1) + '.dat'
np.savetxt(params['bias_values_fn_base'] + str(sim_cnt+1) + '.dat', bias)
def set_my_gids(self, cell_type):
"""
If run on multiple cores, distribute the GIDs among the processes
"""
gid_min, gid_max = utils.distribute_n(self.params['n_%s' % cell_type], self.n_proc, self.pc_id)
self.my_gids[cell_type] = (gid_min + self.params['%s_offset' % cell_type], gid_max + self.params['%s_offset' % cell_type])
