rownorm

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

Function Synopsis

nrm = rownorm(A);

Help Text

ROWNORM - Calculate the L2 norm of each row of a matrix
 function nrm = rownorm(A);
 calculate the Euclidean norm of each ROW in A, return as
 a column vector with same number of rows as A

 See also COLNORM

Cross-Reference Information

bem_kernel                         C:\BrainStorm_2001\Toolbox\bem_kernel.m
bem_xfer                           C:\BrainStorm_2001\Toolbox\bem_xfer.m
bst_headmodeler                    C:\BrainStorm_2001\Toolbox\bst_headmodeler.m
eeg_sph                            C:\BrainStorm_2001\Toolbox\eeg_sph.m
sensor_axial                       C:\BrainStorm_2001\Toolbox\sensor_axial.m
solid_angle2                       C:\BrainStorm_2001\Toolbox\solid_angle2.m
source_grids                       C:\BrainStorm_2001\Toolbox\source_grids.m

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

function nrm = rownorm(A);
%ROWNORM - Calculate the L2 norm of each row of a matrix
% function nrm = rownorm(A);
% calculate the Euclidean norm of each ROW in A, return as
% a column vector with same number of rows as A
%
% See also COLNORM

%<autobegin> ---------------------- 26-May-2004 11:34:18 -----------------------
% --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
%
% CATEGORY: Utility - Numeric
%
% At Check-in: $Author: Mosher $  $Revision: 13 $  $Date: 5/26/04 10:02a $
%
% 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 11:34:18 -----------------------

% ----------------------------- Script History ---------------------------------
% 1994 by John C. Mosher
% May 6, 1994 JCM author
% 19-May-2004 JCM Comments Cleaning
% ----------------------------- Script History ---------------------------------

[m,n] = size(A);

if(n>1),            % multiple columns
  nrm = sqrt(sum([A.*conj(A)],2));
else                % A is col vector
  nrm = abs(A);
end

return