[Eeglablist] using EEG power data to plot topograhpic maps

[Makoto Miyakoshi]

Dear Min,

You can generate arbitrary topoplot using the function below.

topoplot(data, EEG.chanlocs, 'electrodes', 'on', 'emarker', {'.','k',14,1});

data should be a column vector (i.e. channel x 1). EEG.chanlocs is
necessary, so I suggest you first launch EEGLAB and load your data before
you run this line. 14 is the size of black dot; make it less if you want
smaller dots.

Makoto



2013/7/19 Min Sheng <Min.Sheng at utsouthwestern.edu>

>  Hi All,
>
>
>
> I am new to EEGLAB and would like to ask smb's assistance with importing
> of EEG data into EEGLAB and plot topographic maps.
>
> My data is already preprocessed and saved in .mat files as 1 array for
> power of 31 channels(power, channel). I import this data to eeglab, but it
> always shows there is only one channel and 31 epochs,  I was trying to
> change the matrix to 31x1(channel, power), but it did not help.  I could
> not find the answer in help how to use the frequency power to plot
> topographic map.
>
> Please help. Thanks a lot.
>
>
>
> Min
>
>
>
>
>
>
>
> ------------------------------
>
> UT Southwestern Medical Center
> The future of medicine, today.
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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