Dear FreeSurfer experts,
I’ve been trying to find a way to get a map of the difference between two independent CTh association maps but can’t seem to find a solution.
I have two maps of independent groups (one is N=15, the other N=20) I would like to compare. Is there maybe a way to do a sig1.mgh – sig2.mgh and then visualize this? Not sure how to go about it. I’m basically trying to visualize what is left over after subtracting one map from the other (independent samples t-test of sorts).
Thank you so much for any help you may be able to provide!
Best regards,
Fred
the easiest thing to do is to combine all the data together and do a two group test
On 3/22/17 4:49 PM, Uquillas, Federico D'Oleire wrote:
Dear FreeSurfer experts,
I’ve been trying to find a way to get a map of the difference between two independent CTh association maps but can’t seem to find a solution.
I have two maps of independent groups (one is N=15, the other N=20) I would like to compare. Is there maybe a way to do a sig1.mgh – sig2.mgh and then visualize this? Not sure how to go about it. I’m basically trying to visualize what is left over after subtracting one map from the other (independent samples t-test of sorts).
Thank you so much for any help you may be able to provide!
Best regards,
Fred
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
Hi Doug, What do you mean by combining all the data (and how would you suggest we go about this?)? And also how does one do a two-group test?
Thank you!
Best,
Fred
On Mar 22, 2017, at 16:51, Uquillas, Federico D'Oleire FUQUILLAS@mgh.harvard.edu wrote:
Dear FreeSurfer experts,
I’ve been trying to find a way to get a map of the difference between two independent CTh association maps but can’t seem to find a solution.
I have two maps of independent groups (one is N=15, the other N=20) I would like to compare. Is there maybe a way to do a sig1.mgh – sig2.mgh and then visualize this? Not sure how to go about it. I’m basically trying to visualize what is left over after subtracting one map from the other (independent samples t-test of sorts).
Thank you so much for any help you may be able to provide!
Best regards,
Fred
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
when you ran mri_glmfit, you had to give it an input (eg, --y group1.mgh) with all the subjects from group 1. You would have a similar file for group2. You would then combine them into one file, eg
mri_concat group1.mgh group2.mgh --o group1-and2.mgh
you would then create a new FSGD file for both groups, then run mri_glmfit --y goup1-and2.mgh ...
On 3/22/17 4:55 PM, Uquillas, Federico D'Oleire wrote:
Hi Doug, What do you mean by combining all the data (and how would you suggest we go about this?)? And also how does one do a two-group test?
Thank you!
Best,
Fred
On Mar 22, 2017, at 16:51, Uquillas, Federico D'Oleire FUQUILLAS@mgh.harvard.edu wrote:
Dear FreeSurfer experts,
I’ve been trying to find a way to get a map of the difference between two independent CTh association maps but can’t seem to find a solution.
I have two maps of independent groups (one is N=15, the other N=20) I would like to compare. Is there maybe a way to do a sig1.mgh – sig2.mgh and then visualize this? Not sure how to go about it. I’m basically trying to visualize what is left over after subtracting one map from the other (independent samples t-test of sorts).
Thank you so much for any help you may be able to provide!
Best regards,
Fred
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
Ah I see. Okay, will give this a try. Thank you Doug!
Best regards,
Fred
On Mar 22, 2017, at 17:04, Douglas Greve greve@nmr.mgh.harvard.edu wrote:
when you ran mri_glmfit, you had to give it an input (eg, --y group1.mgh) with all the subjects from group 1. You would have a similar file for group2. You would then combine them into one file, eg
mri_concat group1.mgh group2.mgh --o group1-and2.mgh
you would then create a new FSGD file for both groups, then run mri_glmfit --y goup1-and2.mgh ...
On 3/22/17 4:55 PM, Uquillas, Federico D'Oleire wrote: Hi Doug, What do you mean by combining all the data (and how would you suggest we go about this?)? And also how does one do a two-group test?
Thank you!
Best,
Fred
On Mar 22, 2017, at 16:51, Uquillas, Federico D'Oleire FUQUILLAS@mgh.harvard.edu wrote:
Dear FreeSurfer experts,
I’ve been trying to find a way to get a map of the difference between two independent CTh association maps but can’t seem to find a solution.
I have two maps of independent groups (one is N=15, the other N=20) I would like to compare. Is there maybe a way to do a sig1.mgh – sig2.mgh and then visualize this? Not sure how to go about it. I’m basically trying to visualize what is left over after subtracting one map from the other (independent samples t-test of sorts).
Thank you so much for any help you may be able to provide!
Best regards,
Fred
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
Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
freesurfer@nmr.mgh.harvard.edu