Dear FSL experts,
I want to build design matrix and contrast for my TBSS data so I can use it in the command "randomise". The data is FA maps ( for 50 subjects) and the design model is for three groups and two covariates ( one continuous-AGE and the second one categorical-gender).

Regarding design.mat ( the example bellow is just for 9 subjects and 3 groups for illustration purposes)

         Group   EV1   EV2   EV3   EV4   EV5
input1      1      1      0      0
input2      1      1      0      0
input3      1      1      0      0
input4      1      0      1      0
input5      1      0      1      0
input6      1      0      1      0
input7      1      0      0      1
input8      1      0      0      1
input9      1      0      0      1
.
.


EV1, EV2 EV3 are the groups 1 , 2, 3
EV4 demeaned age
EV5 demeaned gender ( male =1, female=2)

The contrasts are
EV1>EV2  1  -1    0  0  0
EV2>EV3  0   1   -1  0  0
EV1>EV3  1   0   -1  0  0
positive EV4 effect 0 0 0 1 0
negative EV4 effect 0 0 0 -1 0
positive EV5 effect 0 0  0 01
negative EV5 effect 0 0 0 0 -1


Kindly is this model correct?
I highly appreciate your help!

Jon