[FieldTrip] ft_sourceinterpolate after grandaverage, interpn error

[cornelius abel]

Here is a workaround:
It seems that it works if you copy the functional data from "GrandAVG 
.avg.avg.pow" to "GrandAVG .avg.pow" prior to interpolation (and then 
using cfg.parameter='avg.pow').

I posted it to the bugzilla system.

Cornelius

Am 23.06.2012 22:01, schrieb 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 <mailto: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 <mailto: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 <mailto:J.Schoffelen at donders.ru.nl>
>>     Telephone: +31-24-3614793 <tel:%2B31-24-3614793>
>>
>>
>>     _______________________________________________
>>     fieldtrip mailing list
>>     fieldtrip at donders.ru.nl <mailto:fieldtrip at donders.ru.nl>
>>     http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
>>
>>
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>
> 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 <mailto:J.Schoffelen at donders.ru.nl>
> Telephone: +31-24-3614793
>
>
>
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