If you seek help with this problem, make sure to send:

On 09/12/2017 02:51 PM, Wang, Xin wrote:
>
> Hello, FreeSurfer group,
>
> When I ran glmfit I got the following error massage. I standardize 
> ages but the problem remains. Any other suggestions? Alternatively, is 
> there any way to by-pass this design checking step?
>
> Thank you very much.
>
> Xin
>
> --------------------------------
>
> ERROR: matrix is ill-conditioned or badly scaled, condno = 1e+08
>
> --------------------------------
>
> Possible problem with experimental design:
>
> Check for duplicate entries and/or lack of range of
>
> continuous variables within a class.
>
> If you seek help with this problem, make sure to send:
>
>   1. Your command line:
>
>     mri_glmfit.bin --y 
> RESULT/group_currPTSD_AgeGenderSiteFACT_adult/lh_group_currPTSD_AgeGenderSiteFACT_adult.fwhm10.fsaverage.mgh
>  
> --fsgd group_currPTSD_AgeGenderSiteFACT_adult.fsgd dods --glmdir 
> RESULT/group_currPTSD_AgeGenderSiteFACT_adult/lh --surf fsaverage/ lh 
> --C group_currPTSD_AgeGenderSiteFACT_adult.mtx
>
>   2. The FSGD file (if using one)
>
>   3. And the design matrix above
>
> Attempting to diagnose further
>
> SumSq: Min=0.330000 (col 38), Max=18.703472 (col 62)
>
> The scale is much different between columns 38 and 62, you may want to
>
>  normalize by subtracting the mean and dividing by the standard deviation.
>
> ERROR: cannot find 
> RESULT/group_currPTSD_AgeGenderSiteFACT_adult/lh/fwhm.dat
>
>
>
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> Freesurfer mailing list
> Freesurfer@nmr.mgh.harvard.edu
> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

-- 
Douglas N. Greve, Ph.D.
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gr...@nmr.mgh.harvard.edu
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