Mercurial > octave-nkf

annotate scripts/image/jet.m @ 19647:e8e3a89fa370

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix colormap functions when N is not of class double (bug #44070) * autumn.m, bone.m, cool.m, copper.m, cubehelix.m, gray.m, hsv.m, ocean.m, rainbow.m, spring.m, summer.m, winter.m: cast N to double since in this colormap functions, N is used directly used in the operations and ends up casting colormap to something else. Note that a colormap MUST be of class double. Also, if N is an integer class, all values in colormap end up 0 or 1. Also simplify code for input checking by declaring default on function signature line. * flag.m, gmap40.m, hot.m, jet.m, lines.m, pink.m, prism.m, white.m: simplify input check like the other colormap functions. * test/colormaps.tst: add new test file to test all colormaps at once. * test/Makefile.am: add new test file to build system. used to create the colormap and if less
author Carnë Draug <carandraug@octave.org>
date Fri, 23 Jan 2015 15:37:56 +0000
parents 446c46af4b42
children 4197fc428c7d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
17744
d63878346099 maint: Update copyright notices for release.
John W. Eaton <jwe@octave.org>
parents: 16480
diff changeset
1 ## Copyright (C) 1999-2013 Kai Habel
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
2 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
3 ## This file is part of Octave.
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
4 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
5 ## Octave is free software; you can redistribute it and/or modify it
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
6 ## under the terms of the GNU General Public License as published by
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6791
diff changeset
7 ## the Free Software Foundation; either version 3 of the License, or (at
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6791
diff changeset
8 ## your option) any later version.
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
9 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
10 ## Octave is distributed in the hope that it will be useful, but
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
13 ## General Public License for more details.
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
14 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
15 ## You should have received a copy of the GNU General Public License
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6791
diff changeset
16 ## along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6791
diff changeset
17 ## <http://www.gnu.org/licenses/>.
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
18
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
19 ## -*- texinfo -*-
11420
466ba499eff5 Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents: 9751
diff changeset
20 ## @deftypefn {Function File} {@var{map} =} jet ()
466ba499eff5 Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents: 9751
diff changeset
21 ## @deftypefnx {Function File} {@var{map} =} jet (@var{n})
466ba499eff5 Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents: 9751
diff changeset
22 ## Create color colormap. This colormap ranges from dark blue through blue,
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
23 ## cyan, green, yellow, red, to dark red.
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
24 ## The argument @var{n} must be a scalar.
11420
466ba499eff5 Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents: 9751
diff changeset
25 ## If unspecified, the length of the current colormap, or 64, is used.
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
26 ## @seealso{colormap}
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
27 ## @end deftypefn
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
28
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
29 ## Author: Kai Habel <kai.habel@gmx.de>
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
30
14640
b9c02ee24de1 new colormap options
Carnë Draug <carandraug+dev@gmail.com>
parents: 14279
diff changeset
31 ## PKG_ADD: colormap ("register", "jet");
b9c02ee24de1 new colormap options
Carnë Draug <carandraug+dev@gmail.com>
parents: 14279
diff changeset
32 ## PKG_DEL: colormap ("unregister", "jet");
b9c02ee24de1 new colormap options
Carnë Draug <carandraug+dev@gmail.com>
parents: 14279
diff changeset
33
19647
e8e3a89fa370 Fix colormap functions when N is not of class double (bug #44070)
Carnë Draug <carandraug@octave.org>
parents: 19627
diff changeset
34 function map = jet (n = rows (colormap ()))
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
35
19647
e8e3a89fa370 Fix colormap functions when N is not of class double (bug #44070)
Carnë Draug <carandraug@octave.org>
parents: 19627
diff changeset
36 if (nargin > 1)
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
37 print_usage ();
19647
e8e3a89fa370 Fix colormap functions when N is not of class double (bug #44070)
Carnë Draug <carandraug@octave.org>
parents: 19627
diff changeset
38 elseif (! isscalar (n))
e8e3a89fa370 Fix colormap functions when N is not of class double (bug #44070)
Carnë Draug <carandraug@octave.org>
parents: 19627
diff changeset
39 error ("jet: N must be a scalar");
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
40 endif
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
41
11420
466ba499eff5 Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents: 9751
diff changeset
42 if (n == 1)
14641
5f1d4def40e1 improve compatibility of colormap functions
Carnë Draug <carandraug+dev@gmail.com>
parents: 14640
diff changeset
43 map = [0, 1, 1];
16480
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
44 elseif (n == 2)
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
45 map = [0, 0, 1
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
46 0, 1, 1];
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
47 elseif (n > 2)
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
48 nel = ceil (n/4); # number of elements
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
49 idx1 = ceil (3/8 * n) + 1; # ~3/8*n for large n
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
50 if (mod (n, 8) == 2)
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
51 idx1++;
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
52 endif
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
53 idx2 = idx1 + nel - 1; # ~5/8*n for large n
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
54 idx3 = min (idx2 + nel, n); # ~7/8*n for large n
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
55
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
56 r = zeros (n, 1);
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
57 r(idx1:idx2, 1) = [1:nel] / nel;
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
58 r(idx2:idx3, 1) = 1;
19627
446c46af4b42 strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents: 17744
diff changeset
59 nel2 = n - idx3;
16480
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
60 r(idx3:(idx3+nel2), 1) = [nel:-1:(nel - nel2)] / nel;
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
61
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
62 idx1 = idx1 - nel; # ~1/8*n for large n
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
63 idx2 = idx1 + nel - 1; # ~3/8*n for large n
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
64 idx3 = min (idx2 + nel, n); # ~5/8*n for large n
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
65
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
66 g = zeros (n, 1);
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
67 g(idx1:idx2, 1) = [1:nel] / nel;
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
68 g(idx2:idx3, 1) = 1;
19627
446c46af4b42 strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents: 17744
diff changeset
69 nel2 = min (nel, n - idx3);
16480
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
70 g(idx3:(idx3+nel2), 1) = [nel:-1:(nel - nel2)] / nel;
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
71
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
72 idx1 = max (idx2 - nel, 1); # ~1/8*n for large n
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
73 idx2 = idx2; # ~3/8*n for large n
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
74 idx3 = idx3; # ~5/8*n for large n
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
75
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
76 b = zeros (n, 1);
19627
446c46af4b42 strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents: 17744
diff changeset
77 nel2 = min (nel, idx1-1);
16480
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
78 b(1:idx1, 1) = [(nel - nel2):nel] / nel;
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
79 b(idx1:idx2, 1) = 1;
19627
446c46af4b42 strip trailing whitespace from most source files
John W. Eaton <jwe@octave.org>
parents: 17744
diff changeset
80 nel2 = min (nel, n - idx3);
16480
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
81 b(idx2:(idx2+nel2), 1) = [nel:-1:(nel - nel2)] / nel;
3731a1992083 jet.m: Make colormap compatible with Matlab (bug #36473).
Rik <rik@octave.org>
parents: 15720
diff changeset
82
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
83 map = [r, g, b];
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
84 else
14641
5f1d4def40e1 improve compatibility of colormap functions
Carnë Draug <carandraug+dev@gmail.com>
parents: 14640
diff changeset
85 map = zeros (0, 3);
6788
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
86 endif
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
87
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman]
dbateman
parents:
diff changeset
88 endfunction
9751
2b0cc0b6db61 Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents: 9245
diff changeset
89
2b0cc0b6db61 Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents: 9245
diff changeset
90 %!demo
2b0cc0b6db61 Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents: 9245
diff changeset
91 %! ## Show the 'jet' colormap as an image
14237
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
92 %! image (1:64, linspace (0, 1, 64), repmat ((1:64)', 1, 64));
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
93 %! axis ([1, 64, 0, 1], "ticy", "xy");
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc.
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
94 %! colormap (jet (64));
9751
2b0cc0b6db61 Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents: 9245
diff changeset
95