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"""
Module containing functions to compute the PSTH profile
Copyright 2015, Mario Mulansky <mario.mulansky@gmx.net>
Distributed under the BSD License
"""
import numpy as np
from pyspike import PieceWiseConstFunc
# Computes the Peristimulus time histogram of a set of spike trains
def psth(spike_trains, bin_size):
bins = int((spike_trains[0][-1] - spike_trains[0][0]) / bin_size)
N = len(spike_trains)
combined_spike_train = spike_trains[0][1:-1]
for i in xrange(1, len(spike_trains)):
combined_spike_train = np.append(combined_spike_train,
spike_trains[i][1:-1])
vals, edges = np.histogram(combined_spike_train, bins, density=False)
bin_size = edges[1]-edges[0]
return PieceWiseConstFunc(edges, vals/(N*bin_size))
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