[FieldTrip] ft_sourceinterpolate after grandaverage, interpn error

[jan-mathijs schoffelen]

Hi Martin,

In general, the more info you can provide us with, the more likely it is that anybody can help you. The problem you sketch is too vague to even try start giving hints. It would be best if you could provide us with some detailed error messages to begin with. Even better would be if you create an account on our bugzilla-website, where you can also upload a script and some (small) data structure that would allow us to reproduce the problem.

Best wishes,

Jan-Mathijs

PS: http://bugzilla.fcdonders.nl


On Jun 23, 2012, at 4:05 PM, Martin Winkels wrote:

> I have the same Problem. I can plot my LCMV-Beamformer results on an anatomy. And I can plot the results of the normalize script. But I can't plot the GrandAVG or the Stats results on that anatomy. The interpolate function doesn' work. Without anatomy it works just fine.
> 
> Any hint?
> 
> Thanks, Martin
> 
> On Sat, Jun 23, 2012 at 8:19 AM, jan-mathijs schoffelen <jan.schoffelen at donders.ru.nl> wrote:
> Hi Cornelius,
> 
> Could it be that the parameter 'avg.avg.pow' does not work?
> 
> Best,
> 
> JM
> 
> On Jun 22, 2012, at 2:38 PM, cornelius abel wrote:
> 
>> Dear Fieldtrip list,
>> 
>> i successfully beamformed some steady state activity and the sourceplots per subject are looking very nice.
>> As a next step I tried to calculate a grand average using ft_sourcegrandaverage:
>> 
>> cfg=[];
>> cfg.keepindividual='no';
>> cfg.parameter='avg.pow';
>> GACont= ft_sourcegrandaverage(cfg, AllsourceCont{:});
>> 
>> giving me the following structure:
>> 
>> GACont =
>> pos: [3570x3 double]
>> dim: [17 14 15]
>> avg: [1x1 struct]
>> var: [1x1 struct]
>> dimord: 'voxel'
>> inside: [1846x1 double]
>> outside: [1724x1 double]
>> df: [3570x1 double]
>> cfg: [1x1 struct]
>> 
>> but interpolating this onto an anatomy always gives me an error:
>> 
>> cfg = [];
>> cfg.downsample= 2;
>> cfg.parameter = 'avg.avg.pow';
>> sourceDiffInt= ft_sourceinterpolate(cfg, GACont , mri);
>> 
>> /??? Error using ==> interpn at 155/
>> ///Wrong number of input arguments or some dimension of V is less than 2./
>> ///Error in ==> ft_sourceinterpolate>my_interpn at 464/
>> ///av(sel) = interpn(fv, ax(sel), ay(sel), az(sel), interpmethod);/
>> ///Error in ==> ft_sourceinterpolate at 368/
>> ///av( sel) = my_interpn(fv, ax(sel), ay(sel), az(sel), cfg.interpmethod, cfg.feedback);/
>> 
>> however interpolating a single subject source data works just fine...
>> 
>> cfg = [];
>> cfg.downsample= 2;
>> cfg.parameter = 'avg.pow';
>> sourceDiffInt= ft_sourceinterpolate(cfg, AllsourceCont{1} , mri);
>> 
>> 
>> What am i doing wrong here, any ideas?
>> 
>> 
>> 
>> Greetings, Cornelius
>> 
>> _______________________________________________
>> fieldtrip mailing list
>> fieldtrip at donders.ru.nl
>> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> 
> Jan-Mathijs Schoffelen, MD PhD 
> 
> Donders Institute for Brain, Cognition and Behaviour, 
> Centre for Cognitive Neuroimaging,
> Radboud University Nijmegen, The Netherlands
> 
> Max Planck Institute for Psycholinguistics,
> Nijmegen, The Netherlands
> 
> J.Schoffelen at donders.ru.nl
> Telephone: +31-24-3614793
> 
> 
> _______________________________________________
> fieldtrip mailing list
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> 
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip

Jan-Mathijs Schoffelen, MD PhD 

Donders Institute for Brain, Cognition and Behaviour, 
Centre for Cognitive Neuroimaging,
Radboud University Nijmegen, The Netherlands

Max Planck Institute for Psycholinguistics,
Nijmegen, The Netherlands

J.Schoffelen at donders.ru.nl
Telephone: +31-24-3614793

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