Hi,
I had a problem with a higher level analysis:
An exception has been thrown
Runtime error:- detected by Newmat: matrix is singular
Searching the mailing list gave me a possible solution, that this could
happen, if the mask includes voxels in the filtered_func_data 4D file
with all zeros. In a
post
about a year ago it was stated that this problem is solved with a new
FSL version. However,
recently
there was a comparable discussion with the result that the mask should
not include voxels with all zero. So, is it still a problem when the
mask includes zero-voxels? If so, what is the best trick to avoid the
creation of a mask as preparatory step in the higher level analysis and
instead use an alternative a mask similar as one can do in the first
level analysis at the end of the .fsf-file? So far I copied a custom
made mask into the gfeat-directory at the beginning of the analysis and
made sure that it is write protected. Did work fine until today...
Thanks for the help,
wolf