[Eeglablist] ECOG Plotting and location files

[Arnaud Delorme]

Dear Rajat,

you may use some EEGLAB function to plot this grid but only from the command line. 

1) yes, make your own channel location file

2) go in photophop and write down the coordinate of the center of each disk. Recenter so zero is in the center, convert to polar coordinates (cart2pol) then import the 2-D polar location in EEGLAB. Use the 'plotgrid' option of topoplot (from the command line).

3) Sure.

Best,

Arno

On Oct 25, 2013, at 8:20 AM, Rajat Thomas <rajatthomas at gmail.com> wrote:

> Dear friends,
> 
> I have a 128 electrode ECOG dataset. No location files associated with it.
> 
> I am so new to EEGLAB that I have a couple of basic questions:
> 
> 1. Should I make my own location file?
> 
> 2. I have a sort of X-ray image with the electrode locations on them (attached).
> It would be awesome if someone could get me started converting something like this
> to a location file.
> 
> 3. Can I then use this file to plot ICA components and so on?
> 
> 
> Thanks a lot.
> 
>  Rajat
> 
> 
> -- 
> Rajat Mani Thomas
> Netherlands Institute for Neuroscience
> Amsterdam, The Netherlands
> http://www.cita.utoronto.ca/~thomas
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