Can't Run ICA EEGLab

Question

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Hello everyone!

We have troubles running the ICA. The following error occurs:

Error using sqrtm (line 35)

Expected input to be finite.

Error in runica (line 749)

sphere = 2.0*inv(sqrtm(double(cov(data')))); % find the "sphering" matrix = spher()

Error in pop_runica (line 399)

[EEG.icaweights,EEG.icasphere] = runica( tmpdata, 'lrate', 0.001, g.options{:} );

Visual inspection did not show any abonormalities in that file and the rest of the files are running fine! What could be the issue here?

Any info will be greatly appreciated! Thanks in advance!

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Answer 1

Arnaud Delorme 2019-5-1

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Dear Alina,

This might be because you have linear dependencies in your input data. Could you try something like

[EEG.icaweights,EEG.icasphere] = runica( rand(20,10000), 'lrate', 0.001);

Best wishes,

Arno