[FieldTrip] EEG soure reconstruction using SAM beamformer

[Eelke Spaak]

Hi Praghajith,

You should use the latest version of fieldtrip; it should work with
the 2014 one you mentioned.

The error concerning the 'abort' variable might be caused by fieldtrip
not being on your path correctly. You should add *only* the root
folder to the path yourself (i.e. not using addpath(genpath()) ), then
fieldtrip takes care of the path itself. So do:

restoredefaultpath
addpath <path_to_fieldtrip>
ft_defaults

and then it should work. If it doesn't, let us know.

Best,
Eelke

On 27 August 2014 13:00, Praghajieeth Raajhen <praajhen at gmail.com> wrote:
> Hello!!!!
>
> Please Help out.  where am I going wrong?
>
>  cfg              = [];
>  cfg.channel   = 'EEG';
>  cfg.method   = 'sam';
>  cfg.grid        = grid;
>  cfg.vol         = vol1;
>  cfg.projectnoise = 'yes';
>  cfg.keepfilter = 'yes';
>  source = ft_sourceanalysis( cfg, timelock);
>
> workspace of grid,vol1,timelock (.mat)
> https://www.dropbox.com/s/bu1inxwgeyc01mi/timelock%2Cgrid%2Cvol.mat?dl=0
>
> 1. Using fieldtrip 2013 version
> When i do  EEG sourceanalysis using "SAM" method, following error occurs
>
> Attempted to access noise(0); index must be a positive integer or logical.
>
> Error in ==> beamformer_sam at 111
>   noise = noise(end);
>
> Error in ==> ft_sourceanalysis at 841
>       dip(i) = beamformer_sam(grid, sens, vol,
> squeeze_avg,squeeze(Cy(i,:,:)), optarg{:});
>
>
> PS: same code for MEG source reconsturction works quite good.
>
> 2. Using fieldtrip 2014 version
> when i do the same I'm getting this kind of errors
>
> Undefined function or variable 'abort'.
>
> Error in ==> ft_sourceanalysis at 156
> if abort
>
> PS: Moreover, I cant even do preprocessing with 2014 fieldtrip version. It
> is showing same above error.
>
>
> advance thanks for your kind help.
>
> Praghajith R.S.
> praajhen at gmail.com
> Master Thesis @ UKSH
> Kiel, Germany
>
>
>
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