Hi Nick and Doug,
Can you suggest an alternative way if QDEC is unable to handle a single group? I would like to run these analyses to address reviewers comments.
Best, Manish
________________________________ From: Douglas Greve greve@nmr.mgh.harvard.edu To: Manish Dalwani manishdalwani@yahoo.com Cc: "freesurfer@nmr.mgh.harvard.edu" freesurfer@nmr.mgh.harvard.edu Sent: Thursday, June 20, 2013 11:16 PM Subject: Re: [Freesurfer] Help with QDEC error
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
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