Dear Joana,
Have you checked that the outputs of the individual segmentations are OK?
What command did you use to concatenate the individual bvars?
What design matrix are you using?
What version of FSL are you running (4.1.8 is the latest)?
All the best,
Mark
On 13 Jul 2011, at 10:37, joana wrote:
> Dear all,
>
> I'm trying to run a vertex analysis with FIRST (FSL 4.1) by using the following comand:
>
> first_utils --vertexAnalysis --usebvars -i L_Hipp_all.bvars -d comp_L_hipp.mat -o test/comp_L_hipp --useReconNative --useRigidAlign -v >& test/L_Hipp_output.txt
>
> However, I keep getting this error:
>
> read model
> done reading model
> setting up shape/appearance model
> The shape has 732 vertices.
> 336 modes of variation are retained.
> The model was constructed from 336 training subjects.
> model loaded
> read model
> done reading model
> setting up shape/appearance model
> The shape has 732 vertices.
> 336 modes of variation are retained.
> The model was constructed from 336 training subjects.
> terminate called after throwing an instance of 'NEWMAT::SingularException'
>
>
> Does anyone know why?
>
> I've tried to use the --readBvars to check whether the problem was related to the bvars, however this option is not recognised, perhaps because of the FSL version i'm using?
>
> Any help will be greatly appreciated!
>
> Thanks,
>
> joana
>
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