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# mby3check

## (Toolbox/mby3check.m in BrainStorm 2.0 (Alpha))

### Function Synopsis

    B = mby3check(A,WARN);

### Help Text

    MBY3CHECK - Check to see if matrix is m by 3 or 3 by m.
     function B = mby3check(A,WARN);
     Return matrix as 3 x M, with message to user if M is three also.
     Reject input if neither dimension is three.
     If optional WARN is zero, then no verbosity to user.

### Cross-Reference Information

This function is called by

    cross_mat                          C:\BrainStorm_2001\Toolbox\cross_mat.m
    os_meg                             C:\BrainStorm_2001\Toolbox\os_meg.m

### Listing of function C:\BrainStorm_2001\Toolbox\mby3check.m

    function B = mby3check(A,WARN);
    %MBY3CHECK - Check to see if matrix is m by 3 or 3 by m.
    % function B = mby3check(A,WARN);
    % Return matrix as 3 x M, with message to user if M is three also.
    % Reject input if neither dimension is three.
    % If optional WARN is zero, then no verbosity to user.

    %<autobegin> ---------------------- 26-May-2004 11:30:55 -----------------------
    % --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
    %
    % CATEGORY: Utility - General
    %
    % At Check-in: $Author: Mosher $  $Revision: 13 $  $Date: 5/26/04 9:59a $
    %
    % This software is part of BrainStorm Toolbox Version 2.0 (Alpha) 24-May-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> ------------------------ 26-May-2004 11:30:55 -----------------------

    % ----------------------------- Script History ---------------------------------
    % JCM 19-May-2004 Comments cleaning
    % ----------------------------- Script History ---------------------------------

    [mA,nA] = size(A);

    if(exist('WARN') ~=1),
      WARN = 1;
    end
    if((mA==3) & (nA==3)),
      if(WARN),
      disp('Input matrix is three by three.')
      disp(...
          'Program will assume that each COLUMN corresponds to 3-D information.')
      disp('If assumption is incorrect, rerun routine with matrix transposed.')
      end
      B = A;
    elseif((mA~=3) & (nA~=3))    % neither is a three
      error('Input matrix is not three dimensional in either row or column.')
    elseif(nA==3),         % we want to transpose
      B = A';
    else
      B = A;            % it's fine as is.
    end

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