[Eeglablist] [eeglab] Question about extracting epochs

[Scott Makeig]

Mike -

The following script will do it, I think.   -Scott Makeig

 

function [sorttimes,sortidx] = eeg_sortepochs(EEG)
 

if ~isstruct(EEG)
   error('eeg_sortepochs(): input must be an EEG dataset structure');
end
times = zeros(EEG.trials,1);
for k=1:EEG.trials
     j = find(cell2mat(EEG.epoch(k).eventlatency) == 0);
     times(k) = EEG.epoch(k).eventinit_time{j};
end
[sorttimes,sortidx] = sort(times);
 

return
 

~
~

Mike Cohen wrote:
> Hi. When extracting epochs from continuous data, the epochs are sorted 
> in numerical order according to the event number (i.e., all the 1s 
> first, then all the 2s, then all the 3s, etc.). However, I'd like to 
> have them sorted them chronologically instead. Is there a way to keep 
> the chronological order when epoching different event types? Or is 
> there a way to re-sort extracted epochs according to when during the 
> experiment those events occured?
>  
> Thanks in advance,
> 
> Mike Cohen, FAA-certified pilot
> UC Davis Psychology
> http://dynamicmemorylab.org/mcohen
>