can you send the command line, full terminal output, your fsgd file, and the
Xg.dat created in the output?
On 7/3/2019 11:05 AM, Marie Hill wrote:
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Thanks. When I run mri-glmfit I get Error: matrix is ill-conditioned or badly
scaled.
I have normalised the continuous variable Age.
Kind regards,
Marie
________________________________
From:
[email protected]<mailto:[email protected]>
<[email protected]><mailto:[email protected]>
on behalf of Greve, Douglas N.,Ph.D.
<[email protected]><mailto:[email protected]>
Sent: 03 July 2019 15:24
To: [email protected]<mailto:[email protected]>
Subject: Re: [Freesurfer] Qdec Message to Mailing List
yes, qdec can only have 2 factors with 2 levels. both qdec and mri_glmfit are
linear methods (in fact, qdec just calls mri_glmfit).
On 7/3/2019 9:39 AM, Marie Hill wrote:
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Dear Sir/Madam,
Could I post the following message to the mailing list:
I am running a regression testing for significant difference in cortical
volume, thickness etc with 3 factors: diagnosis, genotype and gender, with age
as a nuisance factor.
I am using qdec but receiving Error: factor 2 must have 2 levels.
Is it true that Qdec only supports factors with 2 levels? There is a page for
qdec levels stating to create a file diagnosis.levels and state the three
levels. I did this however the same error occurs.
I was going to use glm_fit instead but I think my study isn't a linear
regression so isn't suitable (as I am not interested in the change with age,
just between groups).
Kind regards,
Marie
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