Hi,
I have a quick contrast question. If I don't want to regress out one of my variables for a contrast how do i set that up in a contrast file? For example
fsgd: Class a Class b Class c Class d Class e Variables age mmse Input s1 a 23 30 Input s1 b 25 21 Input s1 c 29 25 Input s1 d 26 23 Input s1 e 27 22
Would I have an mtx that looked like this to contrast e from c and d ? 0 0 -.167 -.167 .333 0 0 -.167 -.167 .333 0 0 -.167 -.167 .333
Does this make sense? Would i need to setup different fsgd files?
Thank You, Dan
That contrast does not make sense because it compares intercept, age slope, and mmse slope. I'm not sure what you are trying to do. Do you want an F-test to test whether the groups differ on intercept OR age OR mmse?
On 02/25/2014 03:48 PM, dgw wrote:
Hi,
I have a quick contrast question. If I don't want to regress out one of my variables for a contrast how do i set that up in a contrast file? For example
fsgd: Class a Class b Class c Class d Class e Variables age mmse Input s1 a 23 30 Input s1 b 25 21 Input s1 c 29 25 Input s1 d 26 23 Input s1 e 27 22
Would I have an mtx that looked like this to contrast e from c and d ? 0 0 -.167 -.167 .333 0 0 -.167 -.167 .333 0 0 -.167 -.167 .333
Does this make sense? Would i need to setup different fsgd files?
Thank You, Dan _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
I'm trying to create a contrast that doesn't regress for age and mmse. Is this possible or do i need to create a new fsgd?
Thanks, Dan
On Tue, Feb 25, 2014 at 3:58 PM, Douglas N Greve greve@nmr.mgh.harvard.edu wrote:
That contrast does not make sense because it compares intercept, age slope, and mmse slope. I'm not sure what you are trying to do. Do you want an F-test to test whether the groups differ on intercept OR age OR mmse?
On 02/25/2014 03:48 PM, dgw wrote:
Hi,
I have a quick contrast question. If I don't want to regress out one of my variables for a contrast how do i set that up in a contrast file? For example
fsgd: Class a Class b Class c Class d Class e Variables age mmse Input s1 a 23 30 Input s1 b 25 21 Input s1 c 29 25 Input s1 d 26 23 Input s1 e 27 22
Would I have an mtx that looked like this to contrast e from c and d ? 0 0 -.167 -.167 .333 0 0 -.167 -.167 .333 0 0 -.167 -.167 .333
Does this make sense? Would i need to setup different fsgd files?
Thank You, Dan _______________________________________________ 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 greve@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
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.
You need a new fsgd doug
On 02/25/2014 04:04 PM, dgw wrote:
I'm trying to create a contrast that doesn't regress for age and mmse. Is this possible or do i need to create a new fsgd?
Thanks, Dan
On Tue, Feb 25, 2014 at 3:58 PM, Douglas N Greve greve@nmr.mgh.harvard.edu wrote:
That contrast does not make sense because it compares intercept, age slope, and mmse slope. I'm not sure what you are trying to do. Do you want an F-test to test whether the groups differ on intercept OR age OR mmse?
On 02/25/2014 03:48 PM, dgw wrote:
Hi,
I have a quick contrast question. If I don't want to regress out one of my variables for a contrast how do i set that up in a contrast file? For example
fsgd: Class a Class b Class c Class d Class e Variables age mmse Input s1 a 23 30 Input s1 b 25 21 Input s1 c 29 25 Input s1 d 26 23 Input s1 e 27 22
Would I have an mtx that looked like this to contrast e from c and d ? 0 0 -.167 -.167 .333 0 0 -.167 -.167 .333 0 0 -.167 -.167 .333
Does this make sense? Would i need to setup different fsgd files?
Thank You, Dan _______________________________________________ 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 greve@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422
Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/
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@nmr.mgh.harvard.edu
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dgw -
Douglas N Greve