38 lines
1003 B
Matlab
38 lines
1003 B
Matlab
function spikes = lifspikes(trials, current, tmax, D)
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% Generate spike times of a leaky integrate-and-fire neuron
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% trials: the number of trials to be generated
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% current: the stimulus either as a single value or as a vector
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% tmax: duration of a trial if input is a single number
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% D: the strength of additive white noise
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tau = 0.01;
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if nargin < 4
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D = 1e0;
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end
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vreset = 0.0;
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vthresh = 10.0;
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dt = 1e-4;
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n = length( current );
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if n <= 1
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n = ceil(tmax/dt);
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current = zeros( n, 1 ) + current;
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end
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spikes = cell(trials, 1);
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for k=1:trials
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times = [];
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j = 1;
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v = vreset + (vthresh-vreset)*rand();
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noise = sqrt(2.0*D)*randn(n, 1)/sqrt(dt);
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for i=1:n
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v = v + (- v + noise(i) + current(i))*dt/tau;
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if v >= vthresh
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v = vreset;
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times(j) = i*dt;
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j = j + 1;
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end
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end
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spikes{k} = times;
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end
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end
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