[Eeglablist] Strange Displacement in ERP Images

[Andrew Hill]

Hi Steven,

I use something like this to remove the mean of each epoch, after epoching:

EEG.data=EEG.data-repmat(mean(EEG.data,2),[1 EEG.pnts 1]);


%% or this, but the above probably works better:
EEG.data = detrend(EEG.data);

Hope this helps!
Andrew


On Sep 13, 2013, at 11:09 AM, Steven Pillen <stevendpillen at gmail.com> wrote:

> Hello again, EEGLAB list.
> 
> When processing ERP images, we noticed a frequent occurrence.  It looks like there is something displacing one of the ERPs compared to the other, as seen here: http://i.imgur.com/SlXuTqJ.png
> 
> Is there some way to make these more properly overlap?
> 
> Thank you,
> Steven Pillen
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