Hi. This is a very large dataset - you'll need quite a lot more swap
probably - try 4GB (though you may have a problem with the 2GB process
limit on linux if you need more than that - though I think you can
change the kernel params to increase that?).
Cheers.
On Fri, 8 Oct 2004, Axel Thielscher wrote:
> Hi - I try to analyze an EP image series created with AFNI using the
> GLM-module of FSL. I used 3dAFNItoANALYZE provided by AFNI to transform the
> EP BRIK to an 4D-Analyze-File. The size of this file is either around 630 MB
> (voxel values stored as integer) or 1.3GB (voxel values stored as floating
> point) and it contains 1280 volumes of one session.
>
> The analysis with FEAT doesn't work with either of the two files. More
> specifically, the command
> /usr/local/fsl/bin/film_gls -rn stats -noest filtered_func_data design.mat
> 11.12 3201
> fails and is apparently unable to read to file.
>
> My computer: Red Hat Linux 9, Intel P-4, 1GB RAM, 2GB swap space
>
> Does this problem stem from insufficient swap space? The analysis with AFNI
> works fine, but I would be happy to use the more advanced features such as
> prewhitening etc. provided by FSL. How much memory do you recommend for
> input file sizes as quoted above? Can this failure be caused by a different
> problem?
>
> Thanks,
> Axel
>
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
|