[Eeglablist] Rank(EEG.data)

[Makoto Miyakoshi]

Dear Hamed,

> Do you know what can be my fault or what is the reason of this issue?

Try rank(double(EEG.data')) Most likely that's because your input was
single precision data.

Makoto

On Mon, Jul 23, 2018 at 1:53 PM Hamed Taheri <hamedtaheri at yahoo.com> wrote:

> Hello all,
>
> I have a problem with rank(EEG.data).
> Actually, before running the ICA I'm using rank(EEG.data) to run the ICA
> in the proper rank with PCA. But the given results by rank(EEG.data) are
> very strange.
> For example, I have 64 channels EEG and after preprocessing I have 60 but
> the rank(EEG.data) gives me 11 or for another data 20.
> I've tried with several data and all results were strange. I was in doubt
> maybe I made a bridge between channels during injecting gel but I've tried
> with another data which I'm sure they are perfect but I see the same
> problem.
> Do you know what can be my fault or what is the reason of this issue?
> I remember if data wasn't full rank the EEGLAB gave us a message before
> running the ICA which you will have fewer ICs and showed up the number of
> ICs but now I don't have this message even if I know I interpolated for
> instance 5 channels.
>
> I would be so thankful if you could help me.
>
> Hamed
>
>
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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