Hi Marris,
The file you need to edit is not SPM.mat, but the file you save when
you build your design matrix. It seems you didn't save your settings,
so you need to do this first.
John showed how to save the settings of preprocessing in the page 9 of
his tutorial.
Same can be applied to saving the settings of design matrix.
After you build your design matrix, just press the "save" icon. (see
the attached screenshot)
> P.S.: it would be amazing if someone also points out why I have that error. :-)
My guess is that you error is related to Global normalisation.
When you employ 'proportional' global normalisation, the new voxel
value (after proportional scaling) will depend on the global values.
Suppose you want to do global normalisation with total brain volume.
If the voxel value at a cirtain voxel is 0.6 and total brain volume is
1.2 (litre), then the new voxel value will be 0.6/1.2 = 0.5. However
if you set global as 1200 (ml), then the new voxel value will be
0.6/1200 = 0.0005, which can lead to "no inmask voxels" error.
Hope this helps,
Kiyotaka
2015-05-05 0:02 GMT+09:00 Marris Atwood <[log in to unmask]>:
> Hi SPM experts,
>
> Following John's tutorial on VBM with SPM (http://www.fil.ion.ucl.ac.uk/~john/misc/VBMclass10.pdf), I created a VBM model containing my design matrix, etc. As suggested, I chose the "absolute masking" as 0.2.
>
> I encounter a problem
>> Please check your data: There are no inmask voxels
>
> So I wish to load my SPM.mat in and edit it. But it seems that it cannot be loaded and edited, and I have to re-create another model. May I ask if this is really the case or there is a way, but I failed to find it?
>
> P.S.: it would be amazing if someone also points out why I have that error. :-)
>
> Thanks a lot,
> MA
>
--
Kiyotaka Nemoto, M.D., Ph.D.
Assistant Professor
Department of Psychiatry
Division of Clinical Medicine, Faculty of Medicine
University of Tsukuba
1-1-1Tennodai Tsukuba, Ibaraki 305-8575, Japan
E-mail: [log in to unmask]
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