[Eeglablist] Query regarding topoplot

[Ibtissem KHOUAJA BENFRADJ]

Dear list, 

I have a question about the "topoplot" function.This function uses the spline principle to give us the topography of the EEG.
 if we want to measure the EEG of one point that is not covered by an electrode,
 at a given time t, the result of this estimate is compatible with the actual measurements?

I hope you understand my question and I thank you for your valuable answers.

best regards

--------------------------------------------------------------------------------------------------------------------Ibtissem KHOUAJA BENFRADJPhD in computer scienceSpeciality Signal ProcessingLaboratory LTIM, University of Monastir, Tunisiahttp://www.labtim.org/accueil.phpLaboratory LIGM, Univerisity of Paris-East, France http://ligm.u-pem.fr/



From: arno at ucsd.edu
Date: Thu, 6 Nov 2014 11:29:28 +0100
To: mmiyakoshi at ucsd.edu
CC: eeglablist at sccn.ucsd.edu
Subject: Re: [Eeglablist] Query regarding topoplot

Yes, each column (not row) of EEG.icawinv is a component scalp map.The code below plots component number 1.

figure; topoplot(EEG.icawinv(:,1), EEG.chanlocs(EEG.icachansind));
Arno
On Nov 4, 2014, at 9:29 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu> wrote:Dear Rupan,
A raw of EEG.icawinv is component scalp map.
Makoto
On Sat, Nov 1, 2014 at 10:43 AM, Rupan Panja <rupan.panja at gmail.com> wrote:
Dear All,           I am new to BCI research, and facing a problem. I have seen topoplots in many BCI papers, what I don't understand is in topoplot what do we plot columns of W or W-inverse?           Hoping support from you guys.
-- 
Thanking YouRupan Panja


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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego


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