Hello:

I am still confused about how to make the design matrix in FS for group analysis:

I want to create a design matrix like this: X  = 1 + TermAge + TermGender * TermGroup (this should be like   

)

There are just 5 columns, not like DODS, we have 8 columns:

Here is my commandline process:

1) in mris_preproc, we gathered the thickness info from every subjects, the cml is as below:

After this command:

In the command here, the Contrast.mtx  is +0.00000 +1.00000 +1.00000 -1.00000 -1.00000 ,but it the result turns out that the contrast should be +0.00000 -1.00000 -1.00000 +1.00000 +1.00000, cuz the thickness of CN should be bigger than that of AD, so my question is how to know which colomn in the contrast should be Female*CN, Male*CN, Female*AD, Male*AD, I know in DODS, DOSS, this is related how do you how you order your class in the FSGD file, but here, I just have 5 columns, I dont know how to make the correspondences, I can just deduce it from my results, so I attached my FSGD file for you!

the design matrix is , Xg.dat, I ceate the design matrix, design_matrix.mat from matlab:

So my question is how to correspond the different column to the contrast matrix and this ( 

Age

Female * AD

Male * AD

Female * CN

Male * CN

)

So , do you have some specific tutorial for this kind of analysis, if not, can you clarify this to me a little and I would like to make a tutorial for this, cuz