Mercurial > octave
view scripts/plot/draw/contour.m @ 22302:1c4cd12987f5
Use Octave syntax in graphics demos.
* inputdlg.m, listdlg.m, waitbar.m, autumn.m, bone.m, cool.m, copper.m,
cubehelix.m, flag.m, gray.m, hot.m, hsv.m, jet.m, lines.m, ocean.m, pink.m,
prism.m, rainbow.m, rgbplot.m, spring.m, summer.m, viridis.m, white.m,
winter.m, annotation.m, axis.m, clabel.m, daspect.m, datetick.m, grid.m,
legend.m, lighting.m, material.m, pbaspect.m, shading.m, text.m, xlim.m,
ylim.m, zlim.m, area.m, bar.m, barh.m, camlight.m, colorbar.m, comet.m,
comet3.m, contour.m, contour3.m, contourf.m, cylinder.m, ellipsoid.m,
errorbar.m, ezcontour.m, ezcontourf.m, ezmesh.m, ezmeshc.m, ezplot.m,
ezplot3.m, ezsurf.m, ezsurfc.m, feather.m, fill.m, fplot.m, isocaps.m,
isonormals.m, isosurface.m, light.m, line.m, loglog.m, loglogerr.m, mesh.m,
meshc.m, meshz.m, pareto.m, patch.m, pcolor.m, pie.m, pie3.m, plot.m, plot3.m,
plotmatrix.m, plotyy.m, polar.m, quiver.m, quiver3.m, rectangle.m, ribbon.m,
rose.m, scatter.m, scatter3.m, semilogx.m, semilogxerr.m, semilogy.m,
semilogyerr.m, shrinkfaces.m, slice.m, smooth3.m, sombrero.m, stairs.m, stem.m,
stem3.m, stemleaf.m, surf.m, surfc.m, surfl.m, surfnorm.m, tetramesh.m,
trimesh.m, triplot.m, trisurf.m, waterfall.m, copyobj.m, hold.m, linkaxes.m,
linkprop.m, printd.m, refreshdata.m, subplot.m, zoom.m, pcr.m, dump_demos.m:
Use Octave syntax in graphics demos.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 15 Aug 2016 15:15:30 -0700 |
parents | ecce63c99c3f |
children | bac0d6f07a3e |
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## Copyright (C) 1993-2015 Shai Ayal ## ## 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 {} {} contour (@var{z}) ## @deftypefnx {} {} contour (@var{z}, @var{vn}) ## @deftypefnx {} {} contour (@var{x}, @var{y}, @var{z}) ## @deftypefnx {} {} contour (@var{x}, @var{y}, @var{z}, @var{vn}) ## @deftypefnx {} {} contour (@dots{}, @var{style}) ## @deftypefnx {} {} contour (@var{hax}, @dots{}) ## @deftypefnx {} {[@var{c}, @var{h}] =} contour (@dots{}) ## Create a 2-D contour plot. ## ## Plot level curves (contour lines) of the matrix @var{z}, using the ## contour matrix @var{c} computed by @code{contourc} from the same ## arguments; see the latter for their interpretation. ## ## The appearance of contour lines can be defined with a line style @var{style} ## in the same manner as @code{plot}. Only line style and color are used; ## Any markers defined by @var{style} are ignored. ## ## If the first argument @var{hax} is an axes handle, then plot into this axis, ## rather than the current axes returned by @code{gca}. ## ## The optional output @var{c} contains the contour levels in @code{contourc} ## format. ## ## The optional return value @var{h} is a graphics handle to the hggroup ## comprising the contour lines. ## ## Example: ## ## @example ## @group ## x = 0:2; ## y = x; ## z = x' * y; ## contour (x, y, z, 2:3) ## @end group ## @end example ## ## @seealso{ezcontour, contourc, contourf, contour3, clabel, meshc, surfc, caxis, colormap, plot} ## ## @end deftypefn ## Author: Shai Ayal <shaiay@users.sourceforge.net> function [c, h] = contour (varargin) [hax, varargin] = __plt_get_axis_arg__ ("contour", varargin{:}); oldfig = []; if (! isempty (hax)) oldfig = get (0, "currentfigure"); endif unwind_protect hax = newplot (hax); [ctmp, htmp] = __contour__ (hax, "none", varargin{:}); unwind_protect_cleanup if (! isempty (oldfig)) set (0, "currentfigure", oldfig); endif end_unwind_protect if (nargout > 0) c = ctmp; h = htmp; endif endfunction %!demo %! clf; %! colormap ("default"); %! [x, y, z] = peaks (); %! contour (x, y, z); %! title ({"contour() plot (isolines of constant Z)"; "Z = peaks()"}); %!demo %! clf; %! colormap ("default"); %! [theta, r] = meshgrid (linspace (0,2*pi,64), linspace (0,1,64)); %! [X, Y] = pol2cart (theta, r); %! Z = sin (2*theta) .* (1-r); %! contour (X, Y, abs (Z), 10); %! title ({"contour() plot"; "polar fcn: Z = sin (2*theta) * (1-r)"}); %!demo %! clf; %! colormap ("default"); %! z = peaks (); %! contour (z, [0 0]); %! title ({"contour() plot with single isoline at Z == 0"; "Z = peaks()"}); %!test %! hf = figure ("visible", "off"); %! clf (hf); %! unwind_protect %! [x, y, z] = peaks (); %! [c, h] = contour (x, y, z); %! levellist = -6:6; %! set (h, "levellist", levellist); %! assert (get (h, "levellist"), levellist); %! assert (get (h, "levellistmode"), "manual"); %! unwind_protect_cleanup %! close (hf); %! end_unwind_protect %!test %! hf = figure ("visible", "off"); %! clf (hf); %! unwind_protect %! [x, y, z] = peaks (); %! [c, h] = contour (x, y, z); %! levelstep = 3; %! set (h, "levelstep", levelstep); %! assert (get (h, "levelstep"), levelstep); %! assert (get (h, "levelstepmode"), "manual"); %! assert (get (h, "levellist"), -6:levelstep:6); %! assert (get (h, "levellistmode"), "auto"); %! unwind_protect_cleanup %! close (hf); %! end_unwind_protect