[FieldTrip] Source Reconstruction using Openmeeg method

[Johanna Zumer]

Hi Mushfa,

My guess is that the channels that have you used to compute .csdspctrm are
not the same as the channels in cfg.elec.    If you set cfg.channel =
freqPost.label, does that solve it?

Cheers,
Johanna


2013/4/30 Mushfa Yousuf <mushfa.yousuf at googlemail.com>

> Hello Fieldtrippers,
>
> I am doing source reconstruction using EEG channels on a fieldtrip.
>
> I have computed Forward solution i.e head model using  'Openmeeg' and lead
> field successfully.
>
> For the inverse solution using 'dics' method, I wrote the following syntax
>
>
>
>
>
>  cfg              = [];
>  cfg.method       = 'dics';
>  cfg.frequency    = 130;
>  cfg.elec         = dataFIC12.hdr.elec;
>  cfg.grid         = grid;
>  cfg.vol          = vol;
>
>  sourcePost = ft_sourceanalysis(cfg, freqPost);
>
>
> and I have received the following error:
>
>
> ??? Error using ==> mtimes
> Inner matrix dimensions must agree.
>
> Error in ==> beamformer_dics at 314
>         filt = pinv(lf' * invCf * lf) * lf' * invCf;              %
>         Gross eqn. 3, use PINV/SVD to cover rank deficient
>         leadfield
>
> Error in ==> ft_sourceanalysis at 595
>       dip(i) = beamformer_dics(grid, sens, vol, [],
>       squeeze(Cf(i,:,:)), optarg{:});
>
> Error in ==> newCode at 214
> sourcePost = ft_sourceanalysis(cfg, freqPost);
>
>
>
>
> Any help would be appreciated.
>
>
> Regards;
>
>
> Mushfa Yousuf
>
> Neurozentrum,
> Universitätsklinikum Schleswig-Holstein,
> Campus Kiel (UKSH), Deutschland
>
>
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