The FSGD file is incorrect. It has multiple subjects listed, and the string after the subject name is not the name of a class (Tract1_FA is not the same as Tract1). I would suggest working through the example on the wiki tutorial and/or looking at the slides on group analysis. doug
On 06/12/2012 06:05 PM, Shantanu Ghosh wrote: > Hi Doug > > I set up my .fsgd file as follows (4 tracts of interest, 59 subjects > belonging to 2 different groups, CON and PAT): > > GroupDescriptorFile 1 > Title tract_fa > MeasurementName thickness > Class Tract1 > Class Tract2 > Class Tract3 > Class Tract4 > Input Subject1 Tract1_FA > Input Subject1 Tract2_FA > Input Subject1 Tract3_FA > Input Subject1 Tract4_FA > Input Subject2 Tract1_FA > Input Subject2 Tract2_FA > Input Subject3 Tract3_FA > Input Subject3 Tract4_FA > . > . > Input Subject59 Tract4_FA > > and set up the .mtx file for mri_glmfit as: > > C = [zeros(3) eye(4)] > > Is that correct? How do I define the contrast variables = -1 and 0 for the > test? > > I am a little confused. > > Thanks and regards, > shantanu > > On Tue, June 12, 2012 4:57 pm, Douglas N Greve wrote: >> Did you look at the FSGD examples on our wiki? Do a search for FSGD >> doug >> >> On 06/12/2012 04:46 PM, Shantanu Ghosh wrote: >>> Hello Freesurfer experts, >>> >>> How can I specify multiple contrasts for my thickness study with two >>> groups AA and BB, having different number of subjects in each group? My >>> variables are tract-wise FA values, age and IQ. >>> >>> Thanks in advance, >>> Shantanu >>> >>> >>> >> -- >> Douglas N. Greve, Ph.D. >> MGH-NMR Center >> gr...@nmr.mgh.harvard.edu >> Phone Number: 617-724-2358 >> Fax: 617-726-7422 >> >> Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting >> FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html >> >> >> > -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
