[Eeglablist] Rank(EEG.data)

[Clayton Hickey]

Hi Hamed,
Is your data in single precision? I’ve had a similar problem in the past where conversion to double precision fixed the issue.

clayton

Sent from my iPhone

> On 23 Jul 2018, at 12:51, 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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