MATLAB code for ISI frequency distribution
| function [BinCenters, Dist] = ISIFreq(Spikes, Steps) %% ISIFREQ help % % Returns a histogram of 1/ISI frequencies. % % INPUTS: % Spikes: Times of spikes. % Steps (1/units of Spikes): Steps (boundaries) for the histogram % frequency count. % OUTPUTS: % BinCenters: Returns centers of the bins used for the histogram. % Dist: Probability distribution of the ISI Frequencies % % EXAMPLE values used in this paper % Spikes = (Spike times go here); % Steps = 0:0.005:10; % [BinCenters, Dist] = ISIFreq(Spikes, Steps); % figure % bar(BinCenters, Dist); % title 'ISI Frequency Distribution' % xlabel 'Frequencies' % ylabel 'Distribution' % %% ISIFREQ %Offset spikes by 1 and subtract for ISI's; ISIs = Spikes(2:end) - Spikes(1:end-1); %Calculate ISI Frequencies ISIFreqs = 1./ISIs; %Locates the bin centers of the steps BinCenters = [(Steps(1:end-1) + Steps(2:end))./2 Steps(end)]; %Run histogram count Counts = histc(ISIFreqs,Steps); %Convert to probability distribution Dist = Counts./sum(Counts); end |