Hi,
I am relatively new in FSL,and I have a question about creating design matrix in Glm.
I want to analyse DTI data from 103 subject, 49 controls and 53 patients so i ran unpaired T-test and now i want to add additional covariate--age, so I add age as third EV, so matrix looks like this
group EV1 EV2 EV3
1 1 0 39.2
1 1 0 30.6
2 0 1 29.5
2 0 1 25.5
but when i tried to save it, message, which said "problem with processing the model...warning - design matrix uses different groups (for different variances) but these do not contain separable EVs for different groups ( it is necessary that for each EV, only one groups has non-zero values) ", occurred.
I am not sure what i did wrong. Would you be so nice and help me to figure out where the problem is.
best regards
Alena
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