I still don't know what you mean by covarying for gender. What is your 
design? Can you send your FSGD file?
doug

On 09/05/2012 04:44 PM, Jeff Sadino wrote:
> Hello,
>
> I am trying to covary for Gender in mri_glmfit, but I am having errors 
> pop up.  I tried to follow Doug's suggesting in this post:
> http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg12272.html
> but after modifying my Xg.dat file and rerunning mri_glmfit, it says:
> ERROR: matrix is ill-conditioned or badly scaled, condno = 1.53319e+07
>
> I can run it using the --illcond flag, but then I get a bunch of:
> ***
> CEPHES ERROR: fdtrc domain error
> ***
>
> Can anyone please give advice on how to covary for Gender in 
> mri_glmfit (or qdec)?
>
> As always, thank you for all of your great help!!
> Jeff Sadino
>
>
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-- 
Douglas N. Greve, Ph.D.
MGH-NMR Center
gr...@nmr.mgh.harvard.edu
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