[Eeglablist] Saving data set changes rank

[Ramón Martinez]

Hi John,
 This is certainly a very weird behavior.  Would you mind to share the
dataset with us so we can take a look at it?
 Thanks,
Ramon

On Wed, May 16, 2018 at 11:24 AM, Johnson, John T. <john.johnson at gatech.edu>
wrote:

> When I load a data set, the rank of the data is 58, the same as the number
> of channels.
> Making no changes and saving the data set with another name, the rank
> changes to 1.
> I like saving data at various check points while preprocessing, and this
> change in rank can affect specifying rank for the pca option to ica, or
> pcakeep to AMICA.
> Any ideas?
>
> >> EEG = pop_loadset('filename','pre_p36_nv_to.set','filepath','
> Processed/');
> pop_loadset(): loading file Processed/pre_p36_nv_to.set ...
> Reading float file 'Processed/pre_p36_nv_to.fdt'...
> >> rank(EEG.data)
>
> ans =
>
>     58
>
> >> EEG = pop_saveset( EEG, 'filename', 'rankdef.set' );
> Saving dataset...
> >> rank(EEG.data)
>
> ans =
>
>      1
>
> >> rank(EEG.data')
>
> ans =
>
>      1
>
>
> Thanks,
> John
>
>
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-- 
_____________________________________________________
Ramon Martinez-Cancino
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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