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# modulo

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

### Function Synopsis

    mod = modulo(index,N)

### Help Text

    MODULO - Compute the modulo
     function mod = modulo(index,N)

### Cross-Reference Information

This function is called by

    bst_mriviewer                      C:\BrainStorm_2001\Toolbox\bst_mriviewer.m
    pcs_params                         C:\BrainStorm_2001\Toolbox\pcs_params.m

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

    function mod = modulo(index,N)
    %MODULO - Compute the modulo
    % function mod = modulo(index,N)

    %<autobegin> ---------------------- 26-May-2004 11:30:59 -----------------------
    % --------- Automatically Generated Comments Block Using AUTO_COMMENTS ---------
    %
    % CATEGORY: Utility - Numeric
    %
    % At Check-in: $Author: Mosher $  $Revision: 13 $  $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 11:30:59 -----------------------

    % History --------------------------------
    % JCM 08-Sep-2003 Commenting
    % ----------------------------------------

    inter = index/N;
    if inter<0
       inter2 = -inter;
    else
       inter2 = inter;
    end;
    if  inter2 >1
       mod = N * (inter2-1);
    else
       mod = sign(index) * index;
    end;

    if inter<0
       mod  = N-mod;
    end;
    if inter==0
       mod = N;
    end

    mod = round(mod);

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