Re: [Freesurfer] contrast between two independent CTh maps?

2017-03-22 Thread Uquillas, Federico D'Oleire
Ah I see. Okay, will give this a try. Thank you Doug!

Best regards,

Fred

> On Mar 22, 2017, at 17:04, Douglas Greve  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 
>>>  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
>>> 
>>> 
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>>> Freesurfer@nmr.mgh.harvard.edu
>>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
>> ___
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>> Freesurfer@nmr.mgh.harvard.edu
>> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
>> 
>> 
> 
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Re: [Freesurfer] contrast between two independent CTh maps?

2017-03-22 Thread Uquillas, Federico D'Oleire
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 
>  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

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Re: [Freesurfer] contrast between two independent CTh maps?

2017-03-22 Thread Douglas Greve
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 
>>  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
>
>

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Re: [Freesurfer] contrast between two independent CTh maps?

2017-03-22 Thread Douglas Greve
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




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[Freesurfer] contrast between two independent CTh maps?

2017-03-22 Thread Uquillas, Federico D'Oleire
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


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