29 lines
770 B
Matlab
29 lines
770 B
Matlab
function [time, rate] = convolution_rate(spikes, sigma, dt, t_max)
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% PSTH computed with convolution method.
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%
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% [time, rate] = convolution_rate(spikes, sigma, dt, t_max)
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%
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% Arguments:
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% spikes: a vector containing the spike times.
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% sigma : the standard deviation of the Gaussian kernel in seconds.
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% dt : the temporal resolution in seconds.
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% t_max : the trial duration in seconds.
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%
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% Returns:
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two vectors containing the time and the rate.
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time = 0:dt:t_max - dt;
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rate = zeros(size(time));
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spike_indices = round(spikes / dt);
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rate(spike_indices) = 1;
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kernel = gauss_kernel(sigma, dt);
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rate = conv(rate, kernel, 'same');
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end
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function y = gauss_kernel(s, step)
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x = -4 * s:step:4 * s;
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y = exp(-0.5 .* (x ./ s) .^ 2) ./ sqrt(2 * pi) / s;
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end
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