function [E0,E1,nH] = gedges(K)
% GEDGES Return the pairs of nodes that have an edge between them
%
% [E0,E1,NH] = GEDGES(K)

    
% Jerod Weinman
% jerod@acm.org
    
% $Id%
 
% Jerod Weinman
% jerod@acm.org
% Copyright 2004, 2008, 2009
 
%    This file is part of Matlab GridCRF.
%
%    Matlab GridCRF is free software: you can redistribute it and/or modify
%    it under the terms of the GNU General Public License as published by
%    the Free Software Foundation, either version 3 of the License, or
%    (at your option) any later version.
%
%    Matlab GridCRF is distributed in the hope that it will be useful,
%    but WITHOUT ANY WARRANTY; without even the implied warranty of
%    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%    GNU General Public License for more details.
%
%    You should have received a copy of the GNU General Public License
%    along with Matlab GridCRF.  If not, see <http://www.gnu.org/licenses/>.

  E0 = [mkvector(K(:,1:end-1)) ; mkvector(K(1:end-1,:))];
  E1 = [mkvector(K(:,2:end)) ; mkvector(K(2:end,:))];
  
  nH = size(K,1)*(size(K,2)-1);
