[Eeglablist] substracting channels
arno at ucsd.edu
Mon May 5 19:28:52 PDT 2008
If these are the two first channels, you could use the re-referencing
menu, select you new reference channel (channel 2) and then exclude
all channels except channel 1 from referencing. However, this is like
tweaking the program as the re-referencing menu is not really designed
for that purpose.
Alternatively, you may simply type on the command line
EEG.data(1,:,:) = EEG.data(1,:,:) - EEG.data(2,:,:);
then save it in the EEGLAB backup memory
ALLEEG = eeg_store(ALLEEG, EEG, CURRENTSET);
then you may also save it from the EEGLAB menu.
Hope this helps,
On 30 avr. 08, at 14:37, Andrea Handl wrote:
> I would like to construct bipolar channels (VEOG and HEOG) from the
> unipolar channels (average reference) I recorded.
> As I suppose I have to do that by substracting channel a from
> channel b,
> I would like to know how exactly I can
> do that in EEGlab.
> Thank you for your suggestions!
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