Hi Mahinda, you need to tell mri_cor2label that this is a surface with 
the --surf fsaverage lh white
You can propagate this label to other subjects using mri_surf2surf.

doug

On 11/04/2012 10:08 PM, Mahinda Yogarajah wrote:
> Dear Experts,
>
> I am trying to "back-normalise" significant clusters identified in a 
> qdec analysis (2 groups, thickness as main variable of interest) back 
> into individual subjects so that I can derive cortical statisitcs.
>
> As per previous posts I have been trying to use mri_cor2label but am 
> running into some problems.  My processing is as follows:
>
> 1) Identify file of interest which contains 3 clusters (labelled 
> 1.000000 to 3.000000 as viewed in tksurfer and on qdec text output 
> following analysis) significant using Monte Carlo correction 0.05 - 
> mc-z.abs.th13.sig.ocn.annot
>
> 2) mri_cor2label --i mc-z.abs.th13.sig.ocn.annot --id 2 --l cluster2
>
> This produces a file called cluster2.label but when I try loading it 
> into tksurfer (tksurfer fsaverage lh inflated - followed by loading of 
> label in menu system) I get the following error message which prevents 
> me from double checking the label:
>
> % ********************0 nonzero vertices found ********************
>
> label stat field identically zero - setting to 1
>
> 1890 unassigned vertices in label - building spatial LUT...
>
> assigning vertex numbers to label...
>
> Couldn't assign 1617 vertices.
>
> 1617 unassigned vertices in label - building spatial LUT...
>
> assigning vertex numbers to label...
>
> Couldn't assign 1617 vertices.
>
>
> My questions are:
>
> 1) Why does this occur ?
>
> 2) How can I convert my qdec results (eg. mc-z.abs.th13.sig.ocn.annot 
> to label files which I can then propagate to all subjects using 
> mri_label2label).
>
> Thanks.
>
> Mahinda
>
>
>
>
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-- 
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
Phone Number: 617-724-2358
Fax: 617-726-7422

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