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# norcol

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

### Function Synopsis

    [norme] = norcol(Mat)

### Help Text

    NORCOL - (French) squared sum of each column in a matrix
     function [norme] = norcol(Mat)

     Note: This form will fail if Mat is a row vector, returning a scalar rather than
      another row vector.
     See also COLNORM

     norme est un vecteur
     qui contient les normes^2
     des colonnes de la matrice Mat

### Cross-Reference Information

This function is called by

    bst_imaging_display                C:\BrainStorm_2001\Toolbox\bst_imaging_display.m
    bst_sourceimaging                  C:\BrainStorm_2001\Toolbox\bst_sourceimaging.m
    data_selector_cb                   C:\BrainStorm_2001\Toolbox\data_selector_cb.m
    dataplot_cb                        C:\BrainStorm_2001\Toolbox\dataplot_cb.m
    lcmvbf                             C:\BrainStorm_2001\Toolbox\lcmvbf.m
    manage_corticalscouts              C:\BrainStorm_2001\Toolbox\manage_corticalscouts.m
    minnorm                            C:\BrainStorm_2001\Toolbox\minnorm.m
    os_meg                             C:\BrainStorm_2001\Toolbox\os_meg.m
    rapmusic_gui                       C:\BrainStorm_2001\Toolbox\rapmusic_gui.m
    sourceimaging                      C:\BrainStorm_2001\Toolbox\sourceimaging.m

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

    function [norme] = norcol(Mat)
    %NORCOL - (French) squared sum of each column in a matrix
    % function [norme] = norcol(Mat)
    %
    % Note: This form will fail if Mat is a row vector, returning a scalar rather than
    %  another row vector.
    % See also COLNORM
    %
    % norme est un vecteur
    % qui contient les normes^2
    % des colonnes de la matrice Mat

    %<autobegin> ---------------------- 26-May-2004 11:31:14 -----------------------
    % --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
    %
    % CATEGORY: Utility - General
    %
    % At Check-in: $Author: Mosher $  $Revision: 13 $  $Date: 5/26/04 10:00a $
    %
    % 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 11:31:14 -----------------------

    % ----------------------------------------
    % Sylvain Baillet, Ph.D.author.
    % John C. Mosher, Ph.D.
    % JCM 18-Jun-2002 Made function consistent with colnorm, now handles complex and row
    %                 vector cases
    % ----------------------------------------

    if(0)
       % old baillet code
       %norme = diag(Mat'*Mat);

       norme = (sum(Mat.*Mat));

    else

       % give the square L2 norm for each column, for complex and for row vectors
       norme = sum(Mat.*conj(Mat),1);

    end

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