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comparison scripts/plot/triplot.m @ 12792:dc29b64668fa

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codesprint : Move trimesh, triplot, trisurf from geometry to plot directory * geometry/module.mk, plot/module.mk: Move trimesh, triplot, trisurf from geometry to plot directory.
author Rik <octave@nomad.inbox5.com>
date Sat, 16 Jul 2011 09:16:52 -0700
parents scripts/geometry/triplot.m@87926ee23581
children e8564e8b0043
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12791:610a4e780a19 12792:dc29b64668fa
1 ## Copyright (C) 2007-2011 David Bateman
2 ##
3 ## This file is part of Octave.
4 ##
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
9 ##
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
14 ##
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
18
19 ## -*- texinfo -*-
20 ## @deftypefn {Function File} {} triplot (@var{tri}, @var{x}, @var{y})
21 ## @deftypefnx {Function File} {} triplot (@var{tri}, @var{x}, @var{y}, @var{linespec})
22 ## @deftypefnx {Function File} {@var{h} =} triplot (@dots{})
23 ## Plot a triangular mesh in 2D@. The variable @var{tri} is the triangular
24 ## meshing of the points @code{(@var{x}, @var{y})} which is returned from
25 ## @code{delaunay}. If given, the @var{linespec} determines the properties
26 ## to use for the lines. The output argument @var{h} is the graphic handle
27 ## of the plot.
28 ## @seealso{plot, trimesh, trisurf, delaunay}
29 ## @end deftypefn
30
31 function h = triplot (tri, x, y, varargin)
32
33 if (nargin < 3)
34 print_usage ();
35 endif
36
37 idx = tri(:, [1, 2, 3, 1]).';
38 nt = size (tri, 1);
39 if (nargout > 0)
40 h = plot ([x(idx); NaN(1, nt)](:),
41 [y(idx); NaN(1, nt)](:), varargin{:});
42 else
43 plot ([x(idx); NaN(1, nt)](:),
44 [y(idx); NaN(1, nt)](:), varargin{:});
45 endif
46 endfunction
47
48 %!demo
49 %! rand ('state', 2)
50 %! x = rand (20, 1);
51 %! y = rand (20, 1);
52 %! tri = delaunay (x, y);
53 %! triplot (tri, x, y);