Extracting epochs

In the GUI

1. Tools › Extract epochs
2. Extract data epochs - pop_epoch()...Time-locking event type(s) ([]=all)
3. Ok ← rtsquaresquaresquare
4. Epoch limits [start, end] in seconds ← -1 2
5. Name for the new dataset ← D1 epochs
6. Out-of-bounds EEG limits if any [min max]
7. OkName it:Overwrite it in memory (set=yes; unset=create a new dataset)Ok

Script

EEG = pop_epoch(EEG, {'square'}, [-1 2], 'newname', 'D1 epochs', 'epochinfo', 'yes');
EEG = eeg_checkset(EEG);
disp(size(EEG.data));
fprintf('Epochs: %d, from %.3f s to %.3f s\n', EEG.trials, EEG.xmin, EEG.xmax);

Which value should I choose?

For your Methods

Continuous data were segmented into epochs from -1 to 2 s relative to the onset of each square stimulus (pop_epoch, EEGLAB 2026.1), yielding [80] epochs.