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Dear Freesurfer users,
I was trying yo use mri_glmfit-sim after using mri_glmfit that run successfully and I encounter this error:
ERROR: matrix is ill-conditioned or badly scaled, condno = 1e+08
-------------------------------- -------- ERROR: READ THIS ----------------- --vvvvvvvvvvvvvvvvvvvvvvvvvvvvvv----- 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 --C /bcbl/home/public/PD_ANALYSIS/FREESURFER_PPMI/stats/lh.atr.avg16_syn_bbr.FA_Avg.corr_g_glmdir/tmp.mri_glmfit-sim-29440/contrast_moca_groups.mtx --sim perm 1000 1.5 /bcbl/home/public/PD_ANALYSIS/FREESURFER_PPMI/stats/lh.atr.avg16_syn_b br.FA_Avg.corr_g_glmdir/csd/perm.th15.abs.j001 --sim-sign abs --fwhm 0 --fsgd /bcbl/home/public/PD_ANALYSIS/FREESURFER_PPMI/stats/lh.atr.avg16_syn_bbr.FA_Avg.corr_g_glmdir/y.fsgd dods --mask /bcbl/home/public/PD_ANALYSIS/FREESURFER_PPMI/stats/lh.atr.avg 16_syn_bbr.FA_Avg.corr_g_glmdir/mask.mgh --y /bcbl/home/public/PD_ANALYSIS/FREESURFER_PPMI/stats/lh.atr.avg16_syn_bbr.FA_Avg.corr_g_glmdir/eres.mgh --perm-force --seed 1669778971 2. The terminal output of this program (ie, everything it prints to the screen) 3. The FSGD file (/bcbl/home/public/PD_ANALYSIS/FREESURFER_PPMI/stats/lh.atr.avg16_syn_bbr.FA_Avg.corr_g_glmdir/y.fsgd) 4. The design matrix (null)/Xg.dat Attempting to diagnose further SumSq: Min=1.455099 (col 24), Max=8.657582 (col 23) ... could not determine the cause of the problem --^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^----
Seems like there is a problem with the condition matrix, but I do not understand why. Could you help me with this problem? I attached the contrast and fsgd files
Best, Vicente Ferrer Predoctoral Researcher BCBL http://secure-web.cisco.com/1kWZEOu8GTFhJvEwUHVoEpHYRwVtjwPjaW-68jFXGIsKvscc...
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