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# kl_gram

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

### Function Synopsis

    v = kl_gram(rprime,rnxrn1,ii)

### Help Text

    KL_GRAM - Kernel computation used in bem_xfer
     function v = kl_gram(rprime,rnxrn1,ii)
     function v = gram(rprime,rnxrn1,ii)

### Cross-Reference Information

This function calls

    dotprod                            C:\BrainStorm_2001\Toolbox\dotprod.m

This function is called by

    bem_xfer                           C:\BrainStorm_2001\Toolbox\bem_xfer.m

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

    function v = kl_gram(rprime,rnxrn1,ii)
    %KL_GRAM - Kernel computation used in bem_xfer
    % function v = kl_gram(rprime,rnxrn1,ii)
    % function v = gram(rprime,rnxrn1,ii)

    %<autobegin> ---------------------- 26-May-2004 11:30:45 -----------------------
    % --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
    %
    % CATEGORY: Forward Modeling
    %
    % Alphabetical list of external functions (non-Matlab):
    %   toolbox\dotprod.m
    %
    % 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 11:30:45 -----------------------

    hp = dotprod(rprime,rnxrn1(3*ii-2:3*ii));
    hall=  dotprod([rprime; rprime; rprime],...
                 [rnxrn1(1:3);rnxrn1(4:6);rnxrn1(7:9)]);
    v = (hp*hall)';  % 1 x 3 vectors

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