[Eeglablist] ICA problem

Arnaud Delorme arno at ucsd.edu
Mon Feb 1 15:56:58 PST 2010


> Arno -- There was a problem with the Matlab rank() function on 64- 
> bit machines, I believe. Has this been solved and Is the auto rank  
> detection -> PCA option currently implemented in runica/binica?   
> Perhaps we could add a 'toy' rank() function pre-test (e.g. finding  
> the rank of a small full-rank matrix to detect if rank() is  
> working...) ? If so, run the rank test; if not, then warn the user  
> or build a work-around rank function that will work properly?

This is correct. This was a problem with Matlab 64-bit in 2007. One of  
the EEGLAB user, Sven Hoffman, implemented an alternate computation of  
the rank which we used whenever the Matlab rank is deficient. However,  
the new Matlab rank is fine now.

Arno




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