[Eeglablist] Error running PCA

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Wed Sep 11 12:09:05 PDT 2019


Dear Matthew,

pop_subcomp() does not update EEG.icaact! Run eeg_checkset(EEG, 'ica')
right after pop_subcomp().

Indeed this is very misleading.

Makoto



On Wed, Sep 4, 2019 at 9:39 AM Gunn, Matthew P <mathewgunn1 at siu.edu> wrote:

> Good morning,
>
> When running the following commands in a script:
>
>    EEG = pop_runica(EEG, 'icatype', 'binica', 'pca',30,'extended',1);
>    EEG = pop_subcomp( EEG, [1], 0);
>    EEG = pop_select( EEG,'nochannel',{'OZ'});
>    EEG = eeg_checkset( EEG );
>    EEG = pop_runica(EEG, 'icatype', 'binica', 'pca',29,'extended',1);
>
> I get the error
>
> Error using  *
> Incorrect dimensions for matrix multiplication. Check that the number of
> columns in the first matrix
> matches the number of rows in the second matrix. To perform elementwise
> multiplication, use '.*'.
>
> Error in pop_runica (line 522)
> meanvar = sum(EEG.icawinv.^2).*sum(transpose((EEG.icaweights *
>
> EEG.icasphere)*EEG.data(EEG.icachansind,:)).^2)/((length(EEG.icachansind)*EEG.pnts)-1);
>
> Error in Remove_C1_n_PCA29_v1a (line 19)
> EEG = pop_runica(EEG, 'icatype', 'binica', 'pca',29,'extended',1);
>
> I am confused as to why I get this error as the script has worked on other
> PCs and works when running the command individually in the command window.
>
> I am currently using mathlab 2019a and EEGlab 2019
>
> Thank you for your time,
>
> Matt Gunn
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-- 
Makoto Miyakoshi
Assistant Project Scientist, Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego


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