[Eeglablist] segmenting error

[Makoto Miyakoshi]

Dear Liz,

I think I know the issue. This is the limitation of the current EEGLAB, so
it needs to be fixed by changing the current design by the developers. To
do so, I need to ask you to file the case to the eeglab bugzilla.
https://sccn.ucsd.edu/bugzilla/enter_bug.cgi

I appreciate your patience and cooperation.

Makoto

On Tue, Apr 12, 2016 at 7:17 AM, Liz Chrastil <chrastil at bu.edu> wrote:

> Hi EEGers
>
> I'm running into an error when I segment, remove the baseline using
> pop_rmbase, and reject bad trials.  I am trying to use the entire epoch as
> the baseline.  It works fine for most conditions, but when I come to a
> condition that only has a single instance of condition I run into this
> error (see end of message).  I went through using the gui and it looks like
> it is only a problem when I have a single instance of a condition.  My
> experimental setup will have several times of single trials within a
> condition because I want to combine them at a later time in different ways.
>
> How can I get around this error?  Why does it have a problem with a single
> trial (what is the indexing)?  Is it related to taking the whole epoch as
> the baseline?
>
> Thanks for your help!
>
>
> Here's the error:
> pop_rmbase(): Removing baseline...
> Subscripted assignment dimension mismatch.
>
> Error in eegthresh (line 108)
> elec(indexe,:) = ( sigmin < negthresh(indexe) ) | ( sigmax >
>         posthresh(indexe) );
>
> Error in pop_eegthresh (line 154)
> [Itmp Irej NS Erejtmp] = eegthresh( EEG.data, EEG.pnts, elecrange,
>         negthresh, posthresh, [EEG.xmin EEG.xmax], starttime, endtime);
>
>
> Here is the code I'm trying to run:
> EEG = pop_epoch( EEG, {  conditionname  }, [-0.8         1.5], 'newname',
> [subject,conditionname], 'epochinfo', 'yes');
> [ALLEEG EEG CURRENTSET] = pop_newset(ALLEEG, EEG, CURRENTSET, 'savenew',
> outputFile, 'gui', 'off');
> EEG = eeg_checkset( EEG );
> EEG = pop_rmbase( EEG, [-800    1500]);
> [ALLEEG EEG] = eeg_store(ALLEEG, EEG, CURRENTSET);
> EEG = eeg_checkset( EEG );
> EEG = pop_eegthresh(EEG,1,[1:65] ,-100,100,-0.8,1.296,0,1);
> EEG = pop_rejtrend(EEG,1,[1:65] ,525,50,0.3,0,1,0);
> [ALLEEG EEG CURRENTSET] = pop_newset(ALLEEG, EEG, CURRENTSET, 'savenew',
> artifactrejectedoutputFile, 'gui', 'off');
> EEG = eeg_checkset( EEG );
>
>
> Thanks for any insight,
> Liz
>
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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