No, sorry, you'll have to create a new FSGD. Just compute the mean of each covariate, then subtract the mean from the value for each subject. doug
On 01/30/2014 05:46 PM, Linda Zhang wrote:
Thanks Doug. Can that be done within the fsgd file/command line? I've read threads on demeaning but was never clear on how to do it automatically.
Linda
On 30 January 2014 14:34, Douglas N Greve greve@nmr.mgh.harvard.edu wrote:
Linda, try demeaning your covariates and see if the problem goes away doug
On 01/30/2014 03:24 PM, Linda Zhang wrote:
Dear all,
Whilst running mri_glmfit, the following error occurred:
ERROR: matrix is ill-conditioned or badly scaled, condno = 12375.1
I've attached the design matrix, the fsgd file, and one of the contrast matrices as an example. The command line was:
mri_glmfit --glmdir lh.all.thickness.glmdir --y lh.thickness.10.mgh --fsgd all.fsgd dods --C allavovsallcvo.mtx --C avovscvo.mtx --C mavovsavo.mtx --C mavovsmcvo.mtx --C mcvovscvo.mtx --surf fsaverage lh --cortex
What should I change?
Cheers, Linda
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