Exporting boundary events created in EEGLAB

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Ludovica Garritano
Ludovica Garritano 2023-9-23
回答： Sachin Lodhi 2023-10-4
Hi, I'd like to export to a .txt file the boundary events with their latencies and duration form EEG struct of EEGLAB. In the field EEG.event there's the field 'type' in which all events are present: boundary, square and rt. How do I extract only the boundary ones?

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Sachin Lodhi
Sachin Lodhi 2023-10-4
Ran in:
Hi Ludovica,
Based on my understanding, it seems that you are seeking guidance on extracting ‘latencies’ and ‘durations’ of events with ‘type’ as ‘boundary’. You can use the provided code as a starting point and make the necessary custom changes to suit your specific requirements:
EEG=struct;
EEG.event(1).type = 'square';EEG.event(1).position = 1;EEG.event(1).latencies = rand;EEG.event(1).urevent = 2 * rand; EEG.event(1).duration = 4 * rand;
EEG.event(2).type = 'boundary';EEG.event(2).position = 2;EEG.event(2).latencies = rand;EEG.event(2).urevent = 2 * rand; EEG.event(2).duration = 4 * rand;
EEG.event(3).type = 'rt';EEG.event(3).position = 3;EEG.event(3).latencies = rand;EEG.event(3).urevent = 2 * rand; EEG.event(3).duration = 4 * rand;
EEG.event(4).type = 'boundary';EEG.event(4).position = 3;EEG.event(4).latencies = rand;EEG.event(4).urevent = 2 * rand; EEG.event(4).duration = 4 * rand;
EEG = struct with fields:
event: [1×4 struct]
L=ismember({EEG.event.type},{'boundary'});
exportedData = [EEG.event(L).latencies; EEG.event(L).duration]'
exportedData = 2×2
0.3033 3.6549 0.3962 1.9749
Then you can export the ‘exportedData’ to the .txt file. I hope this helps you in exporting your data.
Best Regards,
Sachin

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