Dear Anna,
On Mon, Mar 1, 2010 at 1:45 PM, Anna Jafarpour <[log in to unmask]> wrote:
> Hi :)
>
> I have problem with epoching EEG data. In the converted data I can easily
> see that there are about 80 trial events in a run, but when I epoch the
> data, there are only about 60-70 epoched trials. I don't understand how that
> can be possible. What should I do to have all the trials epoched?
>
I need to see an example to understand the problem. Please send me
your un-epoched file via yousendit.com.
> I also want to know if I can change the onset of the stimuli in the
> structured data. In the data, the trigger comes 200ms before the stimuli and
> I need to fix this.
>
Yes, that's simple. You can do:
D = spm_eeg_load;
D = timeonset(D, timeonset(D)-0.2);
save(D);
Best,
Vladimir
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