[FieldTrip] ft_mvaranalysis

jan-mathijs schoffelen jan.schoffelen at donders.ru.nl
Tue Jun 3 09:36:13 CEST 2014


This is a low level matlab error and suggests a problem with your data.


On Jun 3, 2014, at 9:32 AM, Tyler Grummett <tyler.grummett at flinders.edu.au> wrote:

> Using the same code it generates the error:
> 
> Error using chol
> Matrix must be positive definite.
> 
> Error in armorf (line 40)
> ap(:,:,1) = inv((chol(ap(:,:,1)/Nr*(Nl-1)))');
> 
> Error in ft_mvaranalysis (line 395)
>             [ar, tmpnoisecov] = armorf(dat, numel(rpt{rlop}), size(tmpdata.trial{1},2),
>             cfg.order);
> 
> 
> 
> *************************
> 
> Tyler Grummett ( BBSc, BSc(Hons I))
> PhD Candidate
> Brain Signals Laboratory
> Flinders University
> Rm 5A301
> Ext 66124
> From: fieldtrip-bounces at science.ru.nl <fieldtrip-bounces at science.ru.nl> on behalf of jan-mathijs schoffelen <jan.schoffelen at donders.ru.nl>
> Sent: Tuesday, 3 June 2014 4:49 PM
> To: FieldTrip discussion list
> Subject: Re: [FieldTrip] ft_mvaranalysis
>  
> Hi Tyler,
> 
> Try using ft_hastoolbox(‘bsmart’,1) and then in the cfg for ft_mvaranalysis cfg.toolbox = ‘bsmart’
> 
> Best,
> Jan-Mathijs
> 
> On Jun 3, 2014, at 3:39 AM, Tyler Grummett <tyler.grummett at flinders.edu.au> wrote:
> 
>> Hello fieldtrippers,
>> 
>> Im having problems with ft_mvaranalysis at line 390: [ar, rc, pe] = mvar(dat', cfg.order, cfg.mvarmethod);
>> 
>> The error message is:
>> 
>> Undefined function 'mvar' for input arguments of type 'double'.
>> 
>> ​Ive tried looking for the function, but I cant find it. Is it likely that it is hidden or absent?
>> 
>> I swear this has worked before on old data, and I didnt update the toolbox between trying it
>> with the old data and with the new data. I have now updated the fieldtrip toolbox and I have
>> tried running the code again, but no luck.
>> 
>> Tyler
>> 
>> *************************
>> 
>> Tyler Grummett ( BBSc, BSc(Hons I))
>> PhD Candidate
>> Brain Signals Laboratory
>> Flinders University
>> Rm 5A301
>> Ext 66124
>> _______________________________________________
>> 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
> 
> http://www.hettaligebrein.nl
> 
> _______________________________________________
> 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

http://www.hettaligebrein.nl

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