bestfitsph

(Toolbox/bestfitsph.m in BrainStorm 2.0 (Alpha))

Function Synopsis

[center,R]=bestfitsph(coord);

Help Text

BESTFITSPH - Find best fitting sphere
 function [center,R]=bestfitsph(coord);
 coord given as m x 3
 returns center
 Uses m-file "dist_sph"

Cross-Reference Information

dist_sph                           C:\BrainStorm_2001\Toolbox\dist_sph.m
norlig                             C:\BrainStorm_2001\Toolbox\norlig.m

bst_wavedata_display               C:\BrainStorm_2001\Toolbox\bst_wavedata_display.m

Listing of function C:\BrainStorm_2001\Toolbox\bestfitsph.m

function [center,R]=bestfitsph(coord);
%BESTFITSPH - Find best fitting sphere
% function [center,R]=bestfitsph(coord);
% coord given as m x 3
% returns center
% Uses m-file "dist_sph"

%<autobegin> ---------------------- 14-Jun-2004 17:09:48 -----------------------
% --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
%
% CATEGORY: Forward Modeling
%
% Alphabetical list of external functions (non-Matlab):
%   toolbox\norlig.m
%
% At Check-in: $Author: Mosher $  $Revision: 13 $  $Date: 6/14/04 3:37p $
%
% This software is part of BrainStorm Toolbox Version 2.0 (Alpha) 14-Jun-2004
% 
% Principal Investigators and Developers:
% ** Richard M. Leahy, PhD, Signal & Image Processing Institute,
%    University of Southern California, Los Angeles, CA
% ** John C. Mosher, PhD, Biophysics Group,
%    Los Alamos National Laboratory, Los Alamos, NM
% ** Sylvain Baillet, PhD, Cognitive Neuroscience & Brain Imaging Laboratory,
%    CNRS, Hopital de la Salpetriere, Paris, France
% 
% See BrainStorm website at http://neuroimage.usc.edu for further information.
% 
% Copyright (c) 2004 BrainStorm by the University of Southern California
% This software distributed  under the terms of the GNU General Public License
% as published by the Free Software Foundation. Further details on the GPL
% license can be found at http://www.gnu.org/copyleft/gpl.html .
% 
% FOR RESEARCH PURPOSES ONLY. THE SOFTWARE IS PROVIDED "AS IS," AND THE
% UNIVERSITY OF SOUTHERN CALIFORNIA AND ITS COLLABORATORS DO NOT MAKE ANY
% WARRANTY, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
% MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, NOR DO THEY ASSUME ANY
% LIABILITY OR RESPONSIBILITY FOR THE USE OF THIS SOFTWARE.
%<autoend> ------------------------ 14-Jun-2004 17:09:48 -----------------------

% History --------------------
% JCM 08-Sep-2003  commenting
% ----------------------------

mass = mean(coord); % center of mass of the scalp vertex locations              
R0 = mean(norlig(coord - ones(size(coord,1),1)*mass)); % Average distance betw
vec0 = [mass,R0];
[minn,brp] = fminsearch('dist_sph',vec0,[],coord);
center = minn(1:end-1)'; % 3x1
R = minn(end);