Mercurial > octave-antonio
annotate scripts/image/gmap40.m @ 14138:72c96de7a403 stable
maint: update copyright notices for 2012
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 02 Jan 2012 14:25:41 -0500 |
parents | c792872f8942 |
children | 11949c9795a0 |
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14138
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maint: update copyright notices for 2012
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1 ## Copyright (C) 2007-2012 David Bateman |
7189 | 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 | |
7 ## the Free Software Foundation; either version 3 of the License, or (at | |
8 ## your option) any later version. | |
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 | |
16 ## along with Octave; see the file COPYING. If not, see | |
17 ## <http://www.gnu.org/licenses/>. | |
18 | |
19 ## -*- texinfo -*- | |
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20 ## @deftypefn {Function File} {@var{map} =} gmap40 () |
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21 ## @deftypefnx {Function File} {@var{map} =} gmap40 (@var{n}) |
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22 ## Create color colormap. The colormap consists of red, green, blue, yellow, |
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23 ## magenta and cyan. This colormap is specifically designed for users of |
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24 ## gnuplot 4.0 where these 6 colors are the allowable ones for patch objects. |
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25 ## The argument @var{n} must be a scalar. |
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26 ## If unspecified, a length of 6 is assumed. Larger values |
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27 ## of @var{n} result in a repetition of the above colors. |
7189 | 28 ## @seealso{colormap} |
29 ## @end deftypefn | |
30 | |
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31 function map = gmap40 (n) |
7189 | 32 |
33 if (nargin == 0) | |
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34 n = 6; |
7189 | 35 elseif (nargin == 1) |
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36 if (! isscalar (n)) |
7189 | 37 error ("gmap40: argument must be a scalar"); |
38 endif | |
39 else | |
40 print_usage (); | |
41 endif | |
42 | |
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43 if (n >= 1) |
7189 | 44 map = repmat ([1, 0, 0; 0, 1, 0; 0, 0, 1; 1, 1, 0; 1, 0, 1; 0, 1, 1], |
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45 ceil (n / 6), 1) (1:n, :); |
7189 | 46 else |
47 map = []; | |
48 endif | |
49 | |
50 endfunction | |
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51 |
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52 %!demo |
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53 %! ## Show the 'gmap40' colormap as an image |
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54 %! image (1:6, linspace (0, 1, 6), repmat (1:6, 6, 1)') |
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55 %! axis ([1, 6, 0, 1], "ticy", "xy") |
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56 %! colormap (gmap40 (6)) |
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57 |