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<p class="MsoNormal">I am trying to plot a PCA derived spatial factor in Matlab. I have PCA toolkit, EEGlab, and Fieldtrip folders downloaded and included in the path.
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">In the past, I have worked with a 64 Channel Neuroscan cap, and I have used the following commands (in Matlab):<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">x = FacPat(:,1);<o:p></o:p></p>
<p class="MsoNormal">topoplot(x,'Neuro64.loc');<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This time, I used a 128-channel EGI HydroCel net; however, for the PCA, I excluded channels 127 and 128. That leaves 126 recording electrodes and 1 reference electrode (Cz).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I saw in EEGLab that there is a GSN-HydroCel-129.sfp file under ‘sample locs’.
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I was wondering if I can adapt this/use this somehow to plot my spatial factors. If so, I was wondering if someone could help me with this. I tried simply deleting the channels I am not using and saving the file (as a .loc), but this does
not work (using the topoplot function). <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks!<o:p></o:p></p>
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