Mercurial > octave-nkf
comparison scripts/image/gmap40.m @ 19647:e8e3a89fa370
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> |
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date | Fri, 23 Jan 2015 15:37:56 +0000 |
parents | 68cc16969f78 |
children | 4197fc428c7d |
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19646:68cc16969f78 | 19647:e8e3a89fa370 |
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29 ## @end deftypefn | 29 ## @end deftypefn |
30 | 30 |
31 ## PKG_ADD: colormap ("register", "gmap40"); | 31 ## PKG_ADD: colormap ("register", "gmap40"); |
32 ## PKG_DEL: colormap ("unregister", "gmap40"); | 32 ## PKG_DEL: colormap ("unregister", "gmap40"); |
33 | 33 |
34 function map = gmap40 (n) | 34 function map = gmap40 (n = rows (colormap ())) |
35 | 35 |
36 if (nargin == 0) | 36 if (nargin > 1) |
37 n = 6; | |
38 elseif (nargin == 1) | |
39 if (! isscalar (n)) | |
40 error ("gmap40: N must be a scalar"); | |
41 endif | |
42 else | |
43 print_usage (); | 37 print_usage (); |
38 elseif (! isscalar (n)) | |
39 error ("gmap40: N must be a scalar"); | |
44 endif | 40 endif |
45 | 41 |
46 if (n > 0) | 42 if (n > 0) |
47 C = [1, 0, 0; 0, 1, 0; 0, 0, 1; 1, 1, 0; 1, 0, 1; 0, 1, 1]; | 43 C = [1, 0, 0; 0, 1, 0; 0, 0, 1; 1, 1, 0; 1, 0, 1; 0, 1, 1]; |
48 map = C(rem (0:(n-1), 6) + 1, :); | 44 map = C(rem (0:(n-1), 6) + 1, :); |
50 map = zeros (0, 3); | 46 map = zeros (0, 3); |
51 endif | 47 endif |
52 | 48 |
53 endfunction | 49 endfunction |
54 | 50 |
55 | |
56 %!demo | 51 %!demo |
57 %! ## Show the 'gmap40' colormap as an image | 52 %! ## Show the 'gmap40' colormap as an image |
58 %! image (1:6, linspace (0, 1, 6), repmat ((1:6)', 1, 6)); | 53 %! image (1:6, linspace (0, 1, 6), repmat ((1:6)', 1, 6)); |
59 %! axis ([1, 6, 0, 1], "ticy", "xy"); | 54 %! axis ([1, 6, 0, 1], "ticy", "xy"); |
60 %! colormap (gmap40 (6)); | 55 %! colormap (gmap40 (6)); |