Dear William,
This is a 4D image - if you look at the output of fslsize or fslhd you will see that dim4=122, which means there are 122 separate timepoints. You should also be able to see this information in FSLView and to change the volume number (to display the 3D images associated with the different timepoints).
So there is no problem with fslstats. Your values simply do not pertain to the first time point, as they are min/max values over the whole 4D dataset. To see values for each timepoint separately, use the -t option in fslstats.
All the best,
Mark
On 17 Apr 2013, at 10:21, William Pettersson-Yeo <[log in to unmask]> wrote:
> Hi Mark,
>
> Thanks for your quick reply.
>
> The image i'm using is that of the weights associated with a multivariate regression: i.e. each voxel is assigned a value indexing its relative contribution to the prediction. To the best of my knowledge it is a 3D image.
>
> I've uploaded a zipped version of the .img file and the associated .hdr file since i'm still getting the same problem.
>
> I also forgot to mention yesterday that the 'fslstats input_image -P 100' command returns the same maximum value as 'fslstats input_image -R' command.
>
> Any light you can shed on this would be much appreciated.
>
> Many thanks for your time.
> William
>
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