yes, after the paired diff, you should create a new fsgd file that has
only one entry per subject (it does not matter which one). You do not
have to have a variable.
Wang, Xin wrote:
Hello, Doug,
I ran into an error when I ran mri_glmfit after I finished
mris_preproc --paired-diff.
ERROR: dimension mismatch between y and x. y has 5 inputs, x has 10
inputs.
I think it is because the mris_preproc -paired-diff generated 5 inputs
of difference within 5 pairs, but my FSGD file still has 10 images. In
addition, I do not want to include age as regressor. but if I deleted
the age column, there is no variable. I attach my FSGD file.
Please tell me how to modify the FSGD file.
Thank you,
Xin Wang
------------------------------------------------------------------------
From: Doug Greve [mailto:[EMAIL PROTECTED]
Sent: Fri 10/12/2007 4:21 PM
To: Wang, Xin
Cc: freesurfer
Subject: Re: [Freesurfer] model for pair-T test
The --paired-diff options just take the difference between adjacently
specfied inputs. You then set up your design matrix or FSGD file and
then run mri_glmfit. The --help for mri_glmfit has a lot of info about
the glm analysis. If you just want to test whether the difference is
0, you can use the --osgm flag (one-sample group mean).
doug
Wang, Xin wrote:
Please give me more detailed explanations of how to run mris_preproc
--paired-diff or (--paired-diff-norm)? and how to setup the GLM after
run this commend? I could not find needed information on the website.
Thank you very much.
Xin
------------------------------------------------------------------------
From: Doug Greve [mailto:[EMAIL PROTECTED]
Sent: Fri 10/5/2007 5:20 PM
To: Wang, Xin
Cc: freesurfer
Subject: Re: [Freesurfer] model for pair-T test
Can you use the --paired-diff to mris_preproc?
Wang, Xin wrote:
Hello, group,
Could anybody tell me how to do the pair T test and the repeat
measurement F test? I will really appreciate if you can share the
steps and GLM of the tests. I am using the old freesurfer group
analysis.
Thank you, very much,
Xin Wang
------------------------------------------------------------------------
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
[EMAIL PROTECTED]
Phone Number: 617-724-2358
Fax: 617-726-7422
In order to help us help you, please follow the steps in:
surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
[EMAIL PROTECTED]
Phone Number: 617-724-2358
Fax: 617-726-7422
In order to help us help you, please follow the steps in:
surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
------------------------------------------------------------------------
GroupDescriptorFile 1
Title back to back no rp
Class first
Class second
Variables age
Input APN01R650_4 first 23
Input APN01R650_5 second 23
Input APN02G650_4 first 36
Input APN02G650_5 second 36
Input APN03L650_3 first 24
Input APN03L650_4 second 24
Input APN04E650_2 first 50
Input APN04E650_3 second 50
Input APN05T650_2 first 23
Input APN05T650_3 second 23
DefaultVariable age
--
Douglas N. Greve, Ph.D.
MGH-NMR Center
[EMAIL PROTECTED]
Phone Number: 617-724-2358
Fax: 617-726-7422
In order to help us help you, please follow the steps in:
surfer.nmr.mgh.harvard.edu/fswiki/BugReporting
_______________________________________________
Freesurfer mailing list
Freesurfer@nmr.mgh.harvard.edu
https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
