[Eeglablist] channel location problem: ipsilateral and contralateral question

Bradley Voytek bradley.voytek at gmail.com
Tue Dec 28 22:06:38 PST 2010


Swap the data, not the channels. Leave the channels alone.

Just move the actual data from EEG.data from one hemisphere to the other.

::brad

On Mon, Dec 27, 2010 at 18:33, Xiaoxi Chen <nancy.chen.psy at gmail.com> wrote:
> Dear all,
>
> My visual stimuli was presented on either left visual field or right visual
> field, so I had to label channel locations on the ipsilateral and
> contralateral sides, and then average the contralateral side of both left
> presented stimuli and right presented stimuli (the same with ipsilateral
> side of both left presented stimuli and right presented stimuli ). Here I
> got a question:
>
> How can this be done in EEGlab?
>
> I  tried to isolate left and right stimuli into two single datasets and load
> different channle location files separately, but I had to append these two
> datasets to draw Sum/Compare ERP waves. While how does EEGlab append several
> datasets- based on the number of channel location, or the name of channel
> location?  If these two datasets had different channel location file, then
> the appended dataset would not have an unnified channel location. How to
> solve this problem.
> And how does  "Sum/Compare ERP waves" draw waves - based on number of
> channel location, or the name of channel location?
>
> Can you give some suggestions?
>
> Thanks for your time.
>
> regards,
> --
> Xiaoxi Chen,
>
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