Mercurial > hg > octave-nkf

annotate scripts/plot/draw/ezcontour.m @ 20830:b65888ec820e draft default tip gccjit

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
dmalcom gcc jit import
author Stefan Mahr <dac922@gmx.de>
date Fri, 27 Feb 2015 16:59:36 +0100
parents 4197fc428c7d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
19898
4197fc428c7d maint: Update copyright notices for 2015.
John W. Eaton <jwe@octave.org>
parents: 19790
diff changeset
1 ## Copyright (C) 2007-2015 David Bateman
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
2 ##
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
3 ## This file is part of Octave.
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
4 ##
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
5 ## Octave is free software; you can redistribute it and/or modify it
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
6 ## under the terms of the GNU General Public License as published by
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
7 ## the Free Software Foundation; either version 3 of the License, or (at
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
8 ## your option) any later version.
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
9 ##
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
10 ## Octave is distributed in the hope that it will be useful, but
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
13 ## General Public License for more details.
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
14 ##
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
15 ## You should have received a copy of the GNU General Public License
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
16 ## along with Octave; see the file COPYING. If not, see
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
17 ## <http://www.gnu.org/licenses/>.
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
18
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
19 ## -*- texinfo -*-
10793
be55736a0783 Grammarcheck the documentation from m-files.
Rik <octave@nomad.inbox5.com>
parents: 9245
diff changeset
20 ## @deftypefn {Function File} {} ezcontour (@var{f})
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
21 ## @deftypefnx {Function File} {} ezcontour (@dots{}, @var{dom})
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
22 ## @deftypefnx {Function File} {} ezcontour (@dots{}, @var{n})
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
23 ## @deftypefnx {Function File} {} ezcontour (@var{hax}, @dots{})
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
24 ## @deftypefnx {Function File} {@var{h} =} ezcontour (@dots{})
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
25 ##
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
26 ## Plot the contour lines of a function.
19790
446c46af4b42 strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents: 17744
diff changeset
27 ##
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
28 ## @var{f} is a string, inline function, or function handle with two arguments
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
29 ## defining the function. By default the plot is over the meshed domain
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
30 ## @code{-2*pi <= @var{x} | @var{y} <= 2*pi} with 60 points in each dimension.
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
31 ##
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
32 ## If @var{dom} is a two element vector, it represents the minimum and maximum
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
33 ## values of both @var{x} and @var{y}. If @var{dom} is a four element vector,
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
34 ## then the minimum and maximum values are @code{[xmin xmax ymin ymax]}.
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
35 ##
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
36 ## @var{n} is a scalar defining the number of points to use in each dimension.
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
37 ##
17122
eaab03308c0b doc: Rewrite docstrings for most plot functions.
Rik <rik@octave.org>
parents: 16993
diff changeset
38 ## If the first argument @var{hax} is an axes handle, then plot into this axis,
eaab03308c0b doc: Rewrite docstrings for most plot functions.
Rik <rik@octave.org>
parents: 16993
diff changeset
39 ## rather than the current axes returned by @code{gca}.
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
40 ##
14001
5f0bb45e615c doc: Update documentation for functions returning a graphics handle h (Bug #34761)
Rik <octave@nomad.inbox5.com>
parents: 11587
diff changeset
41 ## The optional return value @var{h} is a graphics handle to the created plot.
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
42 ##
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
43 ## Example:
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
44 ##
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
45 ## @example
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
46 ## @group
14327
4d917a6a858b doc: Use Octave coding conventions in @example blocks of docstrings.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
47 ## f = @@(x,y) sqrt (abs (x .* y)) ./ (1 + x.^2 + y.^2);
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
48 ## ezcontour (f, [-3, 3]);
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
49 ## @end group
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
50 ## @end example
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
51 ##
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
52 ## @seealso{contour, ezcontourf, ezplot, ezmeshc, ezsurfc}
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
53 ## @end deftypefn
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
54
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
55 function h = ezcontour (varargin)
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
56
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
57 [htmp, needusage] = __ezplot__ ("contour", varargin{:});
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
58
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
59 if (needusage)
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
60 print_usage ();
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
61 endif
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
62
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
63 if (nargout > 0)
16993
78f57b14535c Overhaul ez* family of plot functions.
Rik <rik@octave.org>
parents: 14335
diff changeset
64 h = htmp;
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
65 endif
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
66
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
67 endfunction
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
68
14001
5f0bb45e615c doc: Update documentation for functions returning a graphics handle h (Bug #34761)
Rik <octave@nomad.inbox5.com>
parents: 11587
diff changeset
69
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
70 %!demo
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
71 %! clf;
14247
c4fa5e0b6193 test: Make surface demos reproducible by setting colormap to default at start of demo.
Rik <octave@nomad.inbox5.com>
parents: 14237
diff changeset
72 %! colormap ('default');
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
73 %! f = @(x,y) sqrt (abs (x .* y)) ./ (1 + x.^2 + y.^2);
7337
e70789e0cd92 [project @ 2007-12-28 21:04:44 by jwe]
jwe
parents:
diff changeset
74 %! ezcontour (f, [-3, 3]);
14001
5f0bb45e615c doc: Update documentation for functions returning a graphics handle h (Bug #34761)
Rik <octave@nomad.inbox5.com>
parents: 11587
diff changeset
75