Mercurial > hg > octave-lyh
annotate scripts/image/hsv.m @ 11523:fd0a3ac60b0e
update copyright notices
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Fri, 14 Jan 2011 05:47:45 -0500 |
parents | 466ba499eff5 |
children | c792872f8942 |
rev | line source |
---|---|
11523 | 1 ## Copyright (C) 1999-2011 Kai Habel |
6788 | 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 | |
7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
8 ## your option) any later version. | |
6788 | 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 | |
7016 | 16 ## along with Octave; see the file COPYING. If not, see |
17 ## <http://www.gnu.org/licenses/>. | |
6788 | 18 |
19 ## -*- texinfo -*- | |
20 ## @deftypefn {Function File} {} hsv (@var{n}) | |
11420
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
21 ## Create color colormap. This colormap begins with red, changes through |
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
22 ## yellow, green, cyan, blue, and magenta, before returning to red. |
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
23 ## It is useful for displaying periodic functions. It is obtained by linearly |
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
24 ## varying the hue through all possible values while keeping constant maximum |
8543 | 25 ## saturation and value and is equivalent to |
26 ## @code{hsv2rgb ([linspace(0,1,N)', ones(N,2)])}. | |
27 ## | |
11420
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
28 ## The argument @var{n} must be a scalar. |
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
29 ## If unspecified, the length of the current colormap, or 64, is used. |
6788 | 30 ## @seealso{colormap} |
31 ## @end deftypefn | |
32 | |
33 ## Author: Kai Habel <kai.habel@gmx.de> | |
34 | |
11420
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
35 function map = hsv (n) |
6788 | 36 |
37 if (nargin == 0) | |
11420
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
38 n = rows (colormap); |
6788 | 39 elseif (nargin == 1) |
11420
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
40 if (! isscalar (n)) |
6788 | 41 error ("hsv: argument must be a scalar"); |
42 endif | |
43 else | |
44 print_usage (); | |
45 endif | |
46 | |
11420
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
47 if (n == 1) |
6788 | 48 map = [1, 0, 0]; |
11420
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
49 elseif (n > 1) |
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
50 h = linspace (0, 1, n)'; |
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
51 map = hsv2rgb ([h, ones(n, 1), ones(n, 1)]); |
6788 | 52 else |
53 map = []; | |
54 endif | |
55 | |
56 endfunction | |
9751
2b0cc0b6db61
Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents:
8920
diff
changeset
|
57 |
2b0cc0b6db61
Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents:
8920
diff
changeset
|
58 %!demo |
2b0cc0b6db61
Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents:
8920
diff
changeset
|
59 %! ## Show the 'hsv' colormap as an image |
2b0cc0b6db61
Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents:
8920
diff
changeset
|
60 %! image (1:64, linspace (0, 1, 64), repmat (1:64, 64, 1)') |
2b0cc0b6db61
Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents:
8920
diff
changeset
|
61 %! axis ([1, 64, 0, 1], "ticy", "xy") |
11420
466ba499eff5
Update docstrings for colormap files.
Rik <octave@nomad.inbox5.com>
parents:
9751
diff
changeset
|
62 %! colormap (hsv (64)) |
9751
2b0cc0b6db61
Add demos for colormap functions
Soren Hauberg <hauberg@gmail.com>
parents:
8920
diff
changeset
|
63 |