Mercurial > octave
view scripts/plot/draw/triplot.m @ 24388:206ef5cb8b16
Add titles to most plot demos.
* annotation.m, axis.m, camlookat.m, camorbit.m, campos.m, camroll.m,
camtarget.m, camup.m, camva.m, camzoom.m, grid.m, isocaps.m, isosurface.m,
pareto.m, plotmatrix.m, plotyy.m, shrinkfaces.m, slice.m, trimesh.m, triplot.m,
trisurf.m, axes.m, zoom.m: Add titles to demos.
author | Rik <rik@octave.org> |
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date | Thu, 07 Dec 2017 17:37:05 -0800 |
parents | 01fc0e70d4c1 |
children | 194eb4bd202b |
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## Copyright (C) 2007-2017 David Bateman ## ## This file is part of Octave. ## ## Octave 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. ## ## Octave 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 Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {} {} triplot (@var{tri}, @var{x}, @var{y}) ## @deftypefnx {} {} triplot (@var{tri}, @var{x}, @var{y}, @var{linespec}) ## @deftypefnx {} {@var{h} =} triplot (@dots{}) ## Plot a 2-D triangular mesh. ## ## @var{tri} is typically the output of a Delaunay triangulation over the ## grid of @var{x}, @var{y}. Every row of @var{tri} represents one triangle ## and contains three indices into [@var{x}, @var{y}] which are the ## vertices of the triangles in the x-y plane. ## ## The linestyle to use for the plot can be defined with the argument ## @var{linespec} of the same format as the @code{plot} command. ## ## The optional return value @var{h} is a graphics handle to the created ## patch object. ## @seealso{plot, trimesh, trisurf, delaunay} ## @end deftypefn function h = triplot (tri, x, y, varargin) if (nargin < 3) print_usage (); endif idx = tri(:, [1, 2, 3, 1]).'; nt = rows (tri); htmp = plot ([x(idx); NaN(1, nt)](:), [y(idx); NaN(1, nt)](:), varargin{:}); if (nargout > 0) h = htmp; endif endfunction %!demo %! clf; %! old_state = rand ("state"); %! restore_state = onCleanup (@() rand ("state", old_state)); %! rand ("state", 2); %! N = 20; %! x = rand (N, 1); %! y = rand (N, 1); %! tri = delaunay (x, y); %! triplot (tri, x, y); %! title ("triplot() of random 2-D Delaunay triangulation");