Hi Doug,
Given that the  standard variance can be calculated using the command "mris_calc" and the flag "-sqrt" what is the correct command to do this calculation?
I tried: 
mris_calc gammavar.mgz -sqrt output.txt but it didn't work. Kindly what I am doing wrong?
 
 
Bests,
John
Sent: Monday, December 21, 2015 at 2:20 PM
From: "Douglas N Greve" <greve@nmr.mgh.harvard.edu>
To: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] Qdec visualization
QDEC cannot but the information may be in the output folder. There
should be a file called gammavar.mgh. This will be the standard variance
(so take the square root)

On 12/21/2015 02:08 PM, John Anderson wrote:
> Thanks you very much Doug,
> Please one more question. Is there any way in Qdec to get the stamdard
> error (SE) ?
> Bests,
> John
> *Sent:* Monday, December 21, 2015 at 11:43 AM
> *From:* "Douglas N Greve" <greve@nmr.mgh.harvard.edu>
> *To:* freesurfer@nmr.mgh.harvard.edu
> *Subject:* Re: [Freesurfer] Qdec visualization
> The correction for multiple comparisons is cluster-based. Each cluster
> gets a single number. In the display, all the vertices get that same
> number.
>
> On 12/18/2015 03:17 PM, John Anderson wrote:
> > Hi Freesurfer experts,
> > I am using Qdec in Freesurfer 5.3 to do some cortical thickness
> > comparisons between two groups.
> >
> > Before corrcting the results for multiple comparisons ( monte carlo
> > simulation) the significant differnce between the groups is visualized
> > as a range of color while after correcting for multiple copmparisons
> > the color of the statistical map is usinform ( Attached)
> > Is ther any way to visualze the results as a range of color after
> > correcting the results for multiple comparsiosn
> >
> > Thanks in advance for any advice
> > Bests,
> > John Anderson
> >
> > Senior Research Associate
> > Psychological and Brain Sciences Dept.
> > Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755
> > Phone: +1 (603) 646-9834
> > Fax: +1 (603) 646-1419
> >
> >
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>
> --
> Douglas N. Greve, Ph.D.
> MGH-NMR Center
> greve@nmr.mgh.harvard.edu
> Phone Number: 617-724-2358
> Fax: 617-726-7422
>
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--
Douglas N. Greve, Ph.D.
MGH-NMR Center
greve@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422

Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2
www.nmr.mgh.harvard.edu/facility/filedrop/index.html
Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/

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