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Bug 2014 - sam beamfomer

Reported 2013-02-27 19:10:00 +0100
Modified 2013-10-27 12:16:45 +0100
Product: FieldTrip
Component: inverse
Version: unspecified
Hardware: PC
Operating System: Linux
Importance: P3 normal
Assigned to: Jan-Mathijs Schoffelen
Depends on:
See also:

Hamid - 2013-02-27 19:10:22 +0100

Two bugs: First: MATLAB gives this error in using sam beamfomer: %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% ??? Undefined function or method 'SAM_costfun' for input arguments of type 'double'. Error in ==> fminsearch at 191 fv(:,1) = funfcn(x,varargin{:}); Error in ==> beamformer_sam at 146 [opt_angle, fval, exitflag, output] = fminsearch('SAM_costfun', all_angles(min_ind), optim_options, vox_pos, tanu, tanv, lf, all_cov, inv_cov, noise_cov); Error in ==> ft_sourceanalysis at 871 dip(i) = beamformer_sam(grid, sens, vol, squeeze_avg, squeeze(Cy(i,:,:)), optarg{:}); %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% This is because fminsearch (line 146 of beamfomer_sam) does not have access to the following private files: SAM_costfun.m settang.m Second bug: lcmv beamformer accepts the regularisation parameter in this format: cfg.lambda = '5%'; But sam beamformer accepts regularisation parameter in this format: cfg.lambda = 0.05; They should accept the same format!

Jan-Mathijs Schoffelen - 2013-10-27 12:16:23 +0100

Probably the issue pertaining to the not-finding private function is a user error.

Jan-Mathijs Schoffelen - 2013-10-27 12:16:39 +0100

%-lambda implemented in revision 8646