Hi - this sounds like an illegal f-test; could you send your design.fsf
and we'll take a look.
Cheers.
On Wed, 11 Aug 2004, Arun Bokde wrote:
> Hi,
>
> I get the following error when doing 3 F tests an 2x2 anova. The
> structure is as detailed (yesterday), see
>
> http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0408&L=fsl&T=0&F=&S=&P=4887
>
> The error message is as follows:
> (the initial messages of the 2nd level analysis skipped - there seems
> to be no error message)
>
> /disc1/soft/fsl/bin/flame --cope=filtered_func_data
> --vc=var_filtered_func_data --mask=mask --ld=stats --dm=design.mat
> --cs=design.grp --tc=design.con --zt=100000 --fc=design.fts
> Log directory is: stats
> Setting up:
> nevs=4
> ntpts=70
> ngs=1
> nvoxels=217655
>
>
>
> An exception has been thrown
> Logic error:- detected by Newmat: incompatible dimensions
>
> MatrixType = Rect # Rows = 1; # Cols = 4
> MatrixType = Rect # Rows = 1; # Cols = 4
> MatrixType = Rect # Rows = 1; # Cols = 4
> Trace: MatrixMult; Gsmanager::f_ols_contrast; Gsmanager::ols_contrasts;
> Gsmanager::ols; Gsmanager::initialise; Gsmanager::setup.
>
> grep NumPoints design.mat | awk '{ print $2 }' -
> 70
> grep NumWaves design.mat | awk '{ print $2 }' -
> 4
> echo 66 > stats/dof
>
>
> Any ideas what might be the problem ?
>
> Thanks in advance,
>
> Arun
>
Stephen M. Smith DPhil
Associate Director, FMRIB and Analysis Research Coordinator
Oxford University Centre for Functional MRI of the Brain
John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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