[Eeglablist] How to use eegplot with fewer electrodes

[Andrew Goldfine]

Sorry. I meant topoplot.

I want to only plot 15 channels in the center of the head (no occipital and
no frontal channels). I give topoplot 15 values and an EEG.chanlocs
structure with 15 channels in it. Topoplot gives correct values for those 15
channels, but extrapolates colors to fill the whole head circle. How can I
get it to leave the rest of the circle blank?

Better yet, is there a more simple tool out there that just puts circles
over each channel with a color value with no interpolation? That would be
the easiest approach.

Thanks!

Andy

On Thu, May 12, 2011 at 5:06 PM, Scott Makeig <smakeig at gmail.com> wrote:

> Andy - If you mean topoplot(), then there are keywords to control how much
> of the 'skirt' outside the head is plotted, etc. (I tried to interpolate
> only within the convex hull of the electrode positions, but could not get it
> to work consistently -- anybody wanting to try this, it would be of value, I
> think).
>
> Scott
>
> p.s. eegplot() is the scrolling display ...
>
> On Thu, May 12, 2011 at 8:38 AM, Andrew Goldfine <andygoldfine at gmail.com>wrote:
>
>> I'd like to call eegplot but give it only a subset of channels. The
>> problem is that the figure it produces interpolates outside the channels I
>> give it. Is there a way to limit the interpolation to a small distance
>> around the edge channels or to turn it off all together and just plot small
>> circles at each channel?
>>
>> Thanks,
>> Andy
>>
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>
>
>
> --
> Scott Makeig, Research Scientist and Director, Swartz Center for
> Computational Neuroscience, Institute for Neural Computation & Adj. Prof. of
> Neurosciences, University of California San Diego, La Jolla CA 92093-0559,
> http://sccn.ucsd.edu/~scott
>
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