[Eeglablist] How to use eegplot with fewer electrodes

[Scott Makeig]

Andrew --  Again,  look through the output of

     >> help topoplot

for ways to do that; e.g., look at 'plotrad', etc.

To implement your second suggestion (variably colored channel markers), see
'emarker' ...

Scott


Scott

On Thu, May 12, 2011 at 2:32 PM, Andrew Goldfine <andygoldfine at gmail.com>wrote:

> 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
>>
>
>


-- 
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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