[Eeglablist] merge channels question

[Arnaud Delorme]

Dear Christina,

there is no option to merge channels before plotting them (except from the command line). It was considered at some point but never implemented. From the command line, you can call std_erspplot and collect the output of this function

[STUDY erspdata] = std_erspplot(STUDY, ALLEEG, ....);

erspdata may then contain data of size (5 elecs x 12 susbjects) for example when plotting scalp topographies. You may then average the first dimension and replot the result.

Best regards,

Arno

On Jun 13, 2011, at 7:41 AM, Christina Maxwell wrote:

> Hi All,
> 
> I am new to eeglab/matlab.  I want to know statistics for groups of channels in the ERSP domain in a study.  For example, I want to know differences between independent variables A and B when considering evoked power at frontal electrodes (F3, F4, F5, Fz).  I can select multiple channels and see significant differences in the power spectrum but not ERSP.  The help says that there is a merge channels option but I'm not sure that is what I want and can not find the button to try it out. Any advice is much appreciated.
> 
> Thanks
> Christina 
> 
> -- 
> Christina R. Maxwell, PhD
> Post Doctoral Fellow
> Center for Autism Research
> 267-425-5684
> 
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