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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