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Hey Guillaume,

It’s something to do with spam_mesh_calc, it works using the files before the subtraction.
Also it doesn’t even let me display the surfaces using the surface tool > displace surface in CAT12. 
(this works on the files before subtraction)

spm_mesh_calc({'rh.dicom.resampled.D15_27_2.gii','rh.dicom.resampled.D15_27.gii'},’out.gii', 's1-s2')

Display /data/nicjud/scans_sorted/R_surf_15mm/out.gii
Error using cat_surf_render (line 838)
Unknown action.

Error in cat_surf_display (line 156)
          h = cat_surf_render(Pmesh);

Error in cat12>pushbutton8_Callback (line 221)
cat_surf_display;

Error in gui_mainfcn (line 95)
        feval(varargin{:});

Error in cat12 (line 76)
    gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)cat12('pushbutton8_Callback',hObject,eventdata,guidata(hObject))

 
Error while evaluating uicontrol Callback


best,
nick

On January 18, 2017 at 1:54:07 PM, Guillaume Flandin ([log in to unmask]) wrote:

Dear Nick,

I don't know. Do you have a longer version of the error message
(including function names and line numbers)? Does it only happen with
data created by spm_mesh_calc?

Best regards,
Guillaume.


On 17/01/17 13:40, nick judd wrote:
> Hey Guillaume,
>
> Thanks for your response, I used spm_mesh_calc. Yet when I go to
> ‘estimate surface model’ in CAT12, I get Error using subsref
> *Index exceeds matrix dimensions*. Any idea why?
>
> Thanks,
> Nick
>
> On Wed, Jan 11, 2017 at 3:30 PM, Guillaume Flandin <[log in to unmask]
> <mailto:[log in to unmask]>> wrote:
>
> Dear Nick,
>
> If you want to evaluate an expression from data on surfaces you can
> possibly use spm_mesh_calc.m. For example:
> spm_mesh_calc({'file1.gii','file2.gii'},'diff.gii','s1-s2')
>
> Best regards,
> Guillaume.
>
>
> On 11/01/17 13:30, Nicholas Judd wrote:
> > I used CAT12 on longitudinal pediatric data (pre & post) to get
> WM, GM and surface data. The WM & GM segmentation were in .nii so I
> could just use FSL maths to subtract post-pre before using a
> multiple regression analysis on the delta images. I also used FSL to
> threshold.
> >
> > I tried to use the surface calculator (subject-wise) in CAT12. I
> renamed my files so they would conform (eg.
> lh.text.resampled.D14_001.gii & lh.text.resampled.D14_001_2.gii);
> separated each subject and entered the expression s2-s1. When I run
> the batch it just simply says 'output.... failed'. Does anyone know
> what I am doing wrong? Or know of an alternative way to derive delta
> images from .gii files? (and threshold)
> >
> > Thanks,
> > Nick
> >
>
> --
> Guillaume Flandin, PhD
> Wellcome Trust Centre for Neuroimaging
> University College London
> 12 Queen Square
> London WC1N 3BG
>
>
>
>
> --
> *
> Nicholas Judd* | MSc
> Klingberg Laboratory
> Department of Neuroscience | Karolinska Institutet
> Retzius väg 8 | 171 77 Stockholm
> [log in to unmask]
> <mailto:[log in to unmask]> | klingberglab.se
> <http://klingberglab.se/>
>

--
Guillaume Flandin, PhD
Wellcome Trust Centre for Neuroimaging
University College London
12 Queen Square
London WC1N 3BG