I am using 3dMVM to analyze three groups. See the script below. How do I limit the voxels to white matter only in the output? See the output image below.
3dMVM -prefix Test5.nii -jobs 24 \
-bsVars SDS_deficit \
-qVars "Age,Sex,RMS_rel_av" \
-num_glt 3 \
-gltLabel 1 'nds-ds' -gltCode 1 'SDS_deficit: +1*0 -1*1' \
-gltLabel 2 'nds-hc' -gltCode 2 'SDS_deficit: +1*0 -1*2' \
-gltLabel 3 'ds-hc' -gltCode 3 'SDS_deficit: +1*1 -1*2' \
-mask IIT2.nii \
-dataTable \
Subj SDS_deficit Age Sex RMS_rel_av InputFile \
sub-control01 2 28 2 0.0023 sub-control01.ses-01.FA.warped_5mm.resample.rotate.nii \
sub-control02 2 23 1 0.0061 sub-control02.ses-01.FA.warped_5mm.resample.rotate.nii \
sub-control03 2 25 1 0.0035 sub-control03.ses-01.FA.warped_5mm.resample.rotate.nii \ ...