Hi Christian
Just for the record, is there a way to suspend the global mean scaling
called pre-whitening in the IEEE paper?
Best
Torben
Den 30/10/2009 kl. 23.13 skrev Christian F. Beckmann:
> Hi Jeanette,
>
> melodic_white and melodic_dewhite are simply the PCA-derived
> projection matrices (i.e. the Eigenvectors scaled by the inverse
> singular values). You can request a much higher dimensionality than
> is typically estimated, so the the inital PCA removes less of the
> variance. The voxel-wise variance normalisation you can switch off
> using the --vn option or by de-selcting it in the GUI.
> cheers
> Christian
>
>
>
> On 30 Oct 2009, at 21:14, Jeanette Mumford wrote:
>
>> Hi,
>>
>> I was just wondering if there was a way to suspend prewhitening in
>> melodic. Also, what is the meaning of the numbers in the
>> melodic_white and melodic_dewhite files?
>>
>> Thanks!
>>
>> Jeanette
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