function [x,y] = poly_split(xcells,ycells)
%POLY_JOIN  join segments into NaN-separated polygon
%
%   [x,y] = poly_join(segments.x, segments.y)
%    x    = poly_join(segments.x)
%
% x and y and with a NaN-separator.
%
%See also: POLY_SPLIT

%% Copyright notice
%   --------------------------------------------------------------------
%   Copyright (C) 2010 Deltares for Rijkswaterstaat Kustlijnzorg
%       Gerben J. de Boer
%
%       gerben.deboer@deltares.nl
%
%       Deltares
%       P.O. Box 177
%       2600 MH Delft
%       The Netherlands
%
%   This library 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.
%
%   This library 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 this library.  If not, see <http://www.gnu.org/licenses/>.
%   --------------------------------------------------------------------

% This tools is part of <a href="http://OpenEarth.Deltares.nl">OpenEarthTools</a>.
% OpenEarthTools is an online collaboration to share and manage data and 
% programming tools in an open source, version controlled environment.
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% your own tools.

%% Version <http://svnbook.red-bean.com/en/1.5/svn.advanced.props.special.keywords.html>
% $Id$
% $Date$
% $Author$
% $Revision$
% $HeadURL$
% $Keywords: $

   n = length(xcells);

   for i=1:n

      xcells{i} = [xcells{i}(:)' nan]; 
                    
      if nargin > 1
      ycells{i} = [ycells{i}(:)' nan]; 
      end
   
   end
   
   x = cell2mat(xcells);
   
   if nargin > 1
   y = cell2mat(ycells);
   end

%% EOF   