Hello,
I am attempting to compare 2 subject groups in vbm and I wanted to add age as another
EV. I demeaned the data and set my design matrix and design contrast but get the error
below. I have tried to change my matrix many times in the GLM and can not figure out
what I am doing wrong.
Thanks,
Melissa
/NumWaves 2
/NumPoints 21
/PPheights 1 1
/Matrix
1 0 3.87 0
1 0 -0.63 0
1 0 3.26 0
1 0 2.75 0
1 0 -2.35 0
1 0 1.32 0
1 0 -1.41 0
1 0 0.79 0
1 0 -1.83 0
1 0 0.17 0
0.0 1.0 0 2.63
0.0 1.0 0 3.55
0.0 1.0 0 -3.76
0.0 1.0 0 -2.37
0.0 1.0 0 -0.59
0.0 1.0 0 -1.37
0.0 1.0 0 1.24
0.0 1.0 0 -1.99
0.0 1.0 0 -0.41
0.0 1.0 0 0.67
0.0 1.0 0 -1.83
and my design.con as:
/NumWaves 2
/NumContrasts 4
/PPheights 1 1
/Matrix
1 0 0 0
0 1.0 0 0
1.0 -1.0 0 0
-1.0 1.0 0 0
However, I get the following error after the permutation have run:
An exception has been thrown
Runtime error:- detected by Newmat: matrix is singular
MatrixType = Crout # Rows = 2; # Cols = 2
Trace: Crout(lubksb); GeneralSolvI; InvertedMatrix::Evaluate.
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