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Dear Douglas, 

Attachment: age_sim.mtx
Description: Binary data

Attachment: CMTX_b.fsgd
Description: Binary data


Thank you once again for your reply and your help.

Attached please find the fsgd file (CMTX_b.fsgd) including age row scores and the contrast file. The command line I used is the following:
mri_glmfit --y lh.CMTX_b.thickness.10.mgh --fsgd CMTX_b.fsgd --C Contrasts/age_sim.mtx --surf fsaverage lh --cortex --glmdir lh.CMTX_b_thickness.glmdir

The output is the following:

georgias-mbp:CMTX georgina$ mri_glmfit --y lh.CMTX_b.thickness.10.mgh --fsgd CMTX_b.fsgd --C Contrasts/age_sim.mtx --surf fsaverage lh --cortex --glmdir lh.CMTX_b_thickness.glmdir
gdfRead(): reading CMTX_b.fsgd
INFO: DeMeanFlag keyword not found, DeMeaning will NOT be done.
Continuous Variable Means (all subjects)
0 age 45.2083 12.1603
Class Means of each Continuous Variable
1 patientmale  38.7778 
2 patientfemale  53.0000 
3 controlmale  40.1667 
4 controlfemale  51.8462 
INFO: gd2mtx_method is dods
Reading source surface /Users/georgina/Dropbox/UP_TO_DATE/CMTX_STUDY/CMTX/fsaverage/surf/lh.white
Number of vertices 163842
Number of faces    327680
Total area         65416.984375
AvgVtxArea       0.399269
AvgVtxDist       0.721953
StdVtxDist       0.195470

$Id: mri_glmfit.c,v 1.241.2.4 2016/12/08 22:02:40 zkaufman Exp $
cwd /Users/georgina/Dropbox/UP_TO_DATE/CMTX_STUDY/CMTX
cmdline mri_glmfit.bin --y lh.CMTX_b.thickness.10.mgh --fsgd CMTX_b.fsgd --C Contrasts/age_sim.mtx --surf fsaverage lh --cortex --glmdir lh.CMTX_b_thickness.glmdir 
sysname  Darwin
hostname 192.168.1.32
machine  x86_64
user     georgina
FixVertexAreaFlag = 1
UseMaskWithSmoothing     1
OneSampleGroupMean 0
y    /Users/georgina/Dropbox/UP_TO_DATE/CMTX_STUDY/CMTX/lh.CMTX_b.thickness.10.mgh
logyflag 0
usedti  0
FSGD CMTX_b.fsgd
labelmask  /Users/georgina/Dropbox/UP_TO_DATE/CMTX_STUDY/CMTX/fsaverage/label/lh.cortex.label
maskinv 0
glmdir lh.CMTX_b_thickness.glmdir
IllCondOK 0
ReScaleX 1
DoFFx 0
Creating output directory lh.CMTX_b_thickness.glmdir
Loading y from /Users/georgina/Dropbox/UP_TO_DATE/CMTX_STUDY/CMTX/lh.CMTX_b.thickness.10.mgh
   ... done reading.
INFO: gd2mtx_method is dods
Saving design matrix to lh.CMTX_b_thickness.glmdir/Xg.dat
Computing normalized matrix
Normalized matrix condition is 160.248
Matrix condition is 182721
Found 149955 points in label.
Pruning voxels by thr: 1.175494e-38
Found 148239 voxels in mask
Saving mask to lh.CMTX_b_thickness.glmdir/mask.mgh
Reshaping mriglm->mask...
search space = 73702.448371
ERROR: dimension mismatch between X and contrast Contrasts/age_sim.mtx       X has 8 cols, C has 5 cols


Please note that an equivalent error appears with grey matter volume and surface area. 
Thank you once again,

Best, 
Georgina
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