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−## Copyright (C) 2007-2012 David Bateman
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−##
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−## This file is part of Octave.
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−##
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−## Octave is free software; you can redistribute it and/or modify it
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−## under the terms of the GNU General Public License as published by
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−## the Free Software Foundation; either version 3 of the License, or (at
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−## your option) any later version.
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−##
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−## Octave is distributed in the hope that it will be useful, but
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−## WITHOUT ANY WARRANTY; without even the implied warranty of
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−## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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−## General Public License for more details.
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−##
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−## You should have received a copy of the GNU General Public License
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−## along with Octave; see the file COPYING.  If not, see
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−## <http://www.gnu.org/licenses/>.
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−
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−## -*- texinfo -*-
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−## @deftypefn  {Function File} {} triplot (@var{tri}, @var{x}, @var{y})
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−## @deftypefnx {Function File} {} triplot (@var{tri}, @var{x}, @var{y}, @var{linespec})
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−## @deftypefnx {Function File} {@var{h} =} triplot (@dots{})
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−## Plot a triangular mesh in 2D@.  The variable @var{tri} is the triangular
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−## meshing of the points @code{(@var{x}, @var{y})} which is returned from
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−## @code{delaunay}.  If given, @var{linespec} determines the properties
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−## to use for the lines. 
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−##
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−## The optional return value @var{h} is a graphics handle to the created plot.
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−## @seealso{plot, trimesh, trisurf, delaunay}
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−## @end deftypefn
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−
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−function h = triplot (tri, x, y, varargin)
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−
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−  if (nargin < 3)
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−    print_usage ();
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−  endif
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−
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−  idx = tri(:, [1, 2, 3, 1]).';
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−  nt = rows (tri);
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−  handle = plot ([x(idx); NaN(1, nt)](:),
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−                 [y(idx); NaN(1, nt)](:), varargin{:});
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−
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−  if (nargout > 0)
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−    h = handle;
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−  endif
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−
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−endfunction
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−
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−
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−%!demo
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−%! clf;
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−%! old_state = rand ('state');
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−%! restore_state = onCleanup (@() rand ('state', old_state));
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−%! rand ('state', 2);
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−%! N = 20;
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−%! x = rand (N, 1);
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−%! y = rand (N, 1);
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−%! tri = delaunay (x, y);
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−%! triplot (tri, x, y);
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−