Re: [Freesurfer] Error using chol - FS-FAST selxavg3-sess

selxavg3-sess -sf sessid -a fc.rhamgseed.surf.rh

I have already used this command line many times, previously, using other labels. It has always worked well. I wonder if that error could be come from the update of my computer by macOS 1. Thanks Stefano

Il 31 dicembre 2017 alle 22.34 Douglas Greve greve@nmr.mgh.harvard.edu ha scritto:

What is your mkanalysis-sess command line?


On 12/28/17 8:53 AM, stdp82@virgilio.it mailto:stdp82@virgilio.it wrote:

    > > 

...

    Running the "selxavg3-sess -s" command line in FS-FAST for seed-based functional connectivity analysis

    the following errors occurred:

    --------------------------

    Temporally filtering

    Error using chol

    Matrix must be positive definite.

    Error in fast_selxavg3b (line 947)

    Wseg = inv(chol(toeplitz(acfrun))');

    --------------------------


    Thanks

    Stefano



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