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# 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

This function is called by

    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
    phantom_channel_assignment         C:\BrainStorm_2001\Toolbox\phantom_channel_assignment.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

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