Re: [Freesurfer] correlation analysis

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Unfortunately I get such error message with the matrix 0 0 0 1 ERROR: dimension mismatch between X and contrast contrast.mtx X has 3 cols, C has 4 cols

Instead if I use 0 0 1, it works

Best, RAFAEL That should have failed because it only has 3 values (should have 4). I think it should be 0 0 0 1

On 4/11/19 3:20 AM, TMS lab wrote:

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You are right. I want simply to correlate myelin and nhpt regressing out age. I did it with the following matrix: 0 0 1 And it seems to work. Is it ok this matrix?

Thanks a lot Rafael

Il giorno gio 11 apr 2019 alle 00:22 Greve, Douglas N.,Ph.D. <DGREVE@mgh.harvard.edu mailto:DGREVE@mgh.harvard.edu> ha scritto:

That will compute the average of the Age slope and the NHPT slope.
Probably not what you want to do

On 4/6/19 12:24 PM, TMS lab wrote:
>
>         External Email - Use Caution
>
> Dear Freesurfer team,
>
> I'm running a correlation analysis where I'd like to corelate
> myelination and a clinical parameter (NHPT) regressing out the
effect
> of age.
>
> My contrast.mtx: 0 0 0.5 0.5
>
> This is my FSGD FILE:
> GroupDescriptorFile 1
> Title Myelin
> Class Main
> Variables Age NHPT
> Inputfs_CGaMain  19   18.2
> .......
>
> Is the matrix ok?
>
> Thanks
> Rafael
>
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Il giorno gio 11 apr 2019 alle ore 09:20 TMS lab tmslabna@gmail.com ha scritto:

You are right. I want simply to correlate myelin and nhpt regressing out age. I did it with the following matrix: 0 0 1

And it seems to work. Is it ok this matrix?

Thanks a lot Rafael

Il giorno gio 11 apr 2019 alle 00:22 Greve, Douglas N.,Ph.D. < DGREVE@mgh.harvard.edu> ha scritto:

...

That will compute the average of the Age slope and the NHPT slope. Probably not what you want to do

On 4/6/19 12:24 PM, TMS lab wrote:

...

    External Email - Use Caution

Dear Freesurfer team,

I'm running a correlation analysis where I'd like to corelate myelination and a clinical parameter (NHPT) regressing out the effect of age.

My contrast.mtx: 0 0 0.5 0.5

This is my FSGD FILE: GroupDescriptorFile 1 Title Myelin Class Main Variables Age NHPT Inputfs_CGaMain 19 18.2 .......

Is the matrix ok?

Thanks Rafael

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