External Email - Use Caution ---------- Forwarded message ---------- From: *abedi...@citymail.cuny.edu <abedi...@citymail.cuny.edu>* < abedi...@citymail.cuny.edu> Date: Thursday, April 11, 2019 Subject: Fw: mriglmfit error To: Amrita Bedi <amibedi...@gmail.com>
Amrita Bedi
*Biomedical Engineering - Class of 2018*
*The City College of New York - CUNY*
------------------------------
*From:* abedi...@citymail.cuny.edu
*Sent:* Thursday, April 11, 2019 8:38 AM
*To:* Freesurfer@nmr.mgh.harvard.edu
*Subject:* mriglmfit error
Good morning Freesurfer developers,
While using the mri-glmfit command on 20 subjects. I got the following
error-
--------------------------------
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 test.10B.mgh --fsgd TEST.fsgd --C TEST.mtx --surf
fsaverage lh --cortex --glmdir test.glmdir
2. The FSGD file (if using one)
3. And the design matrix above
Attempting to diagnose further
SumSq: Min=0.000000 (col 6), Max=228.790298 (col 3)
The scale is much different between columns 6 and 3, you may want to
normalize by subtracting the mean and dividing by the standard deviation.
Column 6, all values are 0.
1. My command line used was-
mri_glmfit --y test.10B.mgh --fsgd TEST.fsgd --C TEST.mtx --surf fsaverage
lh --cortex --glmdir test.glmdir
2. My fsgd file and design matrix file are attached.
Thank you for your help.
Amrita Bedi
TEST.fsgd
Description: Binary data
Xg.dat
Description: Binary data
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