[Eeglablist] Question about Channel Location File

[Arnaud Delorme]

Dear IT,

This small script will allow you to plot an array of electrode in EEGLAB. 
This could be used for Ecog as well. There is also an option ‘plotgrid’ in topoplot but then you will not be able to use the EEGLAB graphic interface.

See screen capture https://drive.google.com/open?id=18U0iwAge-arQNiOa5GulBP7bySiTsj6L

Best wishes,

Arno

chanlocs = [];

for x = [-30:30:30]
    for y = [-30:30:30]
        [th, r] =cart2pol(x/100,y/100);
        chanlocs(end+1).theta = th/pi*180;
        chanlocs(end  ).radius = r;
        chanlocs(end  ).sph_radius = 85;
        chanlocs(end  ).labels = sprintf('E%d', length(chanlocs));
    end
end
EEG.chanlocs =convertlocs(chanlocs, 'pol2all');
EEG = pop_chanedit(EEG, 'plotrad', 0.47);
[ALLEEG EEG CURRENTSET] = eeg_store(ALLEEG, EEG);
eeglab redraw


> On Oct 4, 2018, at 12:37 PM, Ivan Testa <ivantesta at hotmail.it> wrote:
> 
> Hello, my name is Ivan Testa. 
> I am a student from Catania's University attending and Electrical Engineering course. For the final project i am co-worcking with the ONLUS vEyes, to study the electrical response of the occipital region (http://magazine.veyes.it/2018/04/16/il-progetto-visual-bci/). 
> The acquisition board we are using is Cyton, from OpenBCI.
> To study the signals, we wanted to plot the graphs via Matlab. Few week ago i found about EEGLAB, i was enthusiastic! 
> But a problem occurred as the channel location we are using is not avaleiable in the choices. Actually we are using a matrix (3X3) of electrodes placed just above the occipital region. 
> So, i wanted to ask: 
> Is there already a channel location file that matches with the configuration we are using?
> Eventually, can I create one?
> How?
> 
> Thanks for the attention
> Hope to hear from you soon.
> 
> IT
> 
>  
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