Hi,
I get the error below when trying to invert some deformation fields. All
other deformation images from the same set are OK.
The V.mat(4,1:3) elements (from spm_vol.m) of the 'images to base inverses
on' are non-zero, although very small (~1e-18). I assume this has something
to do with it.
I can write a modified spm_invdef_ui.m that will force those elements to be
zero but is there a way to avoid this?
Joel
PS I also notice that the V.mat of some of the source images for
(preprocessing) realignment has non-zero elements very close to zero - why
is this?
ERROR MESSAGE:
--------------
??? No perspective projections allowed.
Error in ==> /usr/local/spm2/toolbox/Deformations/spm_invdef.mexsol
Error in ==> /usr/local/spm2/toolbox/Deformations/spm_invdef_ui.m (doit)
On line 34 ==> [iy1,iy2,iy3] = spm_invdef(y1,y2,y3,VT.dim(1:3),inv
(VT.mat),V(1).mat);
Error in ==> /usr/local/spm2/toolbox/Deformations/spm_invdef_ui.m
On line 18 ==> doit(Pi,PT(i,:));
SPM2: spm_Deformations (v1.2) 16:41:31 - 19/04/2005
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