Hi,
I have a further question concerning the design matrix, which I use for the voxelwise statistics in TBSS.
At the moment my design matrix has two EV, the patient group and the control group.
/Num Waves 2
/Num Points 31
/PPheights 1 1
/Matrix
1 0
1 0
1 0
0 1
0 1
0 1
...
Now, I want to add the age as a covariate. (I have demeaned the age). How do I have to change the values in /Num Waves, /Num Points and /PPheigts?
My suggestion is:
/Num Waves 3
/Num Points 31
/PPheights 1 1
/Matrix
1 0 -2
1 0 1
1 0 -1
0 1 4
0 1 2
0 1 1
...
Is that right?
I changed the value in /Num Waves corresponding to the numbers of columns. But I didn't changed the value in /PPheights.
Thank you for your help,
Elena
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