Hi -
In order to correct minor problems with example_func2standard transformation I have used the
nudge_gui to make a transformation matrix which I then applied to my reg_standard/stats folder.
Thus I modified my reg_standard/stats copes and varcopes in my individual .feat folders. When I
redid my higher level analysis with these modified files I get exactly what I expect; i.e. slightly
different zstats in slightly different locations (frankly, quite minor changes after considerable
work!). However, when I try to run an F test on these updated .feat folders I get the following
error message (also see attached report.log):
__________
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; Gsmanager::f_ols_contrast;
Gsmanager::ols_contrasts; Gsmanager::ols; Gsmanager::run.
echo 4 > stats/dof
/bin/rm -f stats/zem* stats/zols* stats/mask*
Rendering using zmin=2.3 zmax=8
_________
Note: I am only using 6 .feat files inorder to de-bug this process. Running the same F test with
the "pre-nudged" data works exactly as expected. Is there a reason why after modifying the
reg_standard/stats folder that higher leval analyses in general work, but F tests do not? I suspect
that it has to do with the other .feat files (copes, varcopes, dof, reg folder) that I have not updated
with my nudge transform, but from reviewing the log files I can't figure out which of these might
be a problem.
Thanks for you help
Paul Borghesani
University of Washington
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