[Eeglablist] ICA related fields on the EEG struct

[Makoto Miyakoshi]

Dear Yamil,

> I would like to know what are each ICA realted fields on the EEG struct
(such as icaact, icaweights, icasphere).

Isn't there EEG.icachaninds or something like that?

If you open eeg_checkset() and read the ica-related part you'll find code
to process them as EEGLAB does.

Makoto

On Mon, Nov 17, 2014 at 12:06 PM, Yamil Vidal Dos Santos <
hvidaldossantos at gmail.com> wrote:

> Dear all,
> I would like to know what are each ICA realted fields on the EEG struct
> (such as icaact, icaweights, icasphere). I remember finding this in a
> tutorial a long time ago, but now I cannot find it.
>
> In particular I would like to know this. The field EEG.icaact is usually
> empty and can be filled by using the function icaact.m or by running
> something like the following line:
>
> EEG.icaact = (EEG.icaweights*EEG.icasphere)*reshape(EEG.data, EEG.nbchan,
> EEG.trials*EEG.pnts);
>
> But the resulting matrix is 2 dimensional (with all the trials
> concatenated). Is this correct? Or should I reshape it to have dimensions
> component x time x trial.
>
> I'm asking these because I'm trying to use an automatic classifier to mark
> components as artifactual. The paper presenting the classifier is this one:
> http://www.behavioralandbrainfunctions.com/content/7/1/30
> Does anyone has experience using this classifier?
> Any alternative methods suggested?
>
> Thanks,
> Yamil Vidal Dos Santos
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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