crossprod

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

Function Synopsis

p=crossprod(x,y)

Help Text

CROSSPROD - Cross product between two sets, each set with three columns
 function p=crossprod(x,y)
 p(i,:)=x(i,:) x y(i,:)
 x and y have three columns
 Deprecated, use Mathworks cross function, each set with three rows

Cross-Reference Information

bem_kernel                         C:\BrainStorm_2001\Toolbox\bem_kernel.m
bem_xfer                           C:\BrainStorm_2001\Toolbox\bem_xfer.m
hrow_linear                        C:\BrainStorm_2001\Toolbox\hrow_linear.m
solid_angle2                       C:\BrainStorm_2001\Toolbox\solid_angle2.m

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

function p=crossprod(x,y)
%CROSSPROD - Cross product between two sets, each set with three columns
% function p=crossprod(x,y)
% p(i,:)=x(i,:) x y(i,:)
% x and y have three columns
% Deprecated, use Mathworks cross function, each set with three rows

%<autobegin> ---------------------- 26-May-2004 11:29:55 -----------------------
% --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
%
% CATEGORY: Utility - Numeric
%
% At Check-in: $Author: Mosher $  $Revision: 12 $  $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 11:29:55 -----------------------


if size(x,2)~=3 | size(y,2)~=3,
  error(' Must have three columns ')
end
p=[x(:,2).*y(:,3)-x(:,3).*y(:,2),...
   x(:,3).*y(:,1)-x(:,1).*y(:,3),...
   x(:,1).*y(:,2)-x(:,2).*y(:,1)];