Thanks Ged
Indeed a fliplr was needed but thanks for clarifying some things for me.
anna
On Jun 19, 2006, at 5:33 AM, Ged Ridgway wrote:
> Hi Anna, Robert,
>
> Robert Welsh wrote:
>> flipud only works on 2d matrices:
>
> That's true, but spm_imcalc actually works on a plane-by-plane
> basis, so this shouldn't be a problem.
>
>> Vo = spm_imcalc(Vi,Vo,'flipud(i1)');
>
> If this (and Robert's equivalent version) gives a left-right flip,
> then I think fliplr instead of flipud should give a superior-
> inferior flip. (This might sound a bit odd, but I think it's just
> that the Analyze images have first axis as along rows, while Matlab
> indexes first down columns).
>
> In the event that you actually want to re-order the slices (i.e.
> neither fliplr nor flipud give the "correct" flip), you could adapt
> Robert's code to do this, replacing the for-loop with something like:
>
> nz = size(aVol,3);
> for iz = 1:nz
> nVol(:,:,iz) = flipud(aVol(:,:,nz+1-iz));
> end
>
> although, note that a flip in any plane can be given by a flip in
> any other plane with a suitable rotation. So you could just use the
> original code to flip, and then use "reorient" to rotate as desired.
>
> Best,
> Ged.
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