I thought it would have worked with a single group. Maybe Nick knows of the top of his head.
doug



On 6/20/13 12:36 PM, Manish Dalwani wrote:
Hi Doug and Freesurfers, 

I realized that I hadn't updated my group levels to one group. However, when I do that..the qdec complains about group.level having at minimum two levels. How can I run (using QDEC) single group regression? 

Thanks,
Manish


From: Manish Dalwani <manishdalwani@yahoo.com>
To: Douglas Greve <greve@nmr.mgh.harvard.edu>; "freesurfer@nmr.mgh.harvard.edu" <freesurfer@nmr.mgh.harvard.edu>
Sent: Thursday, June 20, 2013 1:26 PM
Subject: Re: [Freesurfer] Help with QDEC error

Hi Doug, 

I was out of town for a conference. Please see my attachments. I have the log file and screenshots of ill-matrix conditioning.
Thanks for your help!
Manish


From: Douglas Greve <greve@nmr.mgh.harvard.edu>
To: freesurfer@nmr.mgh.harvard.edu
Sent: Saturday, June 15, 2013 11:09 AM
Subject: Re: [Freesurfer] Help with QDEC error


Can you send the mri_glmfit.log file from /Applications/freesurfer/subjects/qdec/Untitled ?
doug


On 6/14/13 4:57 PM, Manish Dalwani wrote:
Hello Freesurfers, 

I am trying to run regression analyses within patients and one variable of interest which adjusting for the nuisance variables age, IQ, thickness. When i select the group and the CD (variable of interest) and run analyses (DODS), I get the following error: 

Qdec 1.4 (Qdec1.4)

Type: Error
Time: Fri Jun 14 14:49:37 2013
Description: Error in Analyze: command failed: mri_glmfit --y /Applications/freesurfer/subjects/qdec/Untitled/y.mgh --fsgd /Applications/freesurfer/subjects/qdec/Untitled/qdec.fsgd dods --glmdir /Applications/freesurfer/subjects/qdec/Untitled --surf fsaverage lh --C /Applications/freesurfer/subjects/qdec/Untitled/contrasts/lh-Avg-Intercept-thickness.mat --C /Applications/freesurfer/subjects/qdec/Untitled/contrasts/lh-Avg-thickness-CD-Cor.mat --C /Applications/freesurfer/subjects/qdec/Untitled/contrasts/lh-Diff-CONTROLS-PATIENTS-Intercept-thickness.mat --C /Applications/freesurfer/subjects/qdec/Untitled/contrasts/lh-Diff-CONTROLS-PATIENTS-Cor-thickness-CD.mat

Please advice!

Regards,
Manish Dalwani
Instructor
Dept. of Psychiatry
University of Colorado


_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer


_______________________________________________
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.



_______________________________________________
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.