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# 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

This function calls

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

This function is called by

    bst_wavedata_display               C:\BrainStorm_2001\Toolbox\bst_wavedata_display.m
    phantom_channel_assignment         C:\BrainStorm_2001\Toolbox\phantom_channel_assignment.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);

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