Mercurial > octave-nkf
view 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> |
---|---|
date | Fri, 23 Jan 2015 15:37:56 +0000 |
parents | 68cc16969f78 |
children | 4197fc428c7d |
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## Copyright (C) 2007-2013 David Bateman ## ## This file is part of Octave. ## ## Octave is free software; you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or (at ## your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {@var{map} =} gmap40 () ## @deftypefnx {Function File} {@var{map} =} gmap40 (@var{n}) ## Create color colormap. The colormap consists of red, green, blue, yellow, ## magenta and cyan. This colormap is specifically designed for users of ## gnuplot 4.0 where these 6 colors are the allowable ones for patch objects. ## The argument @var{n} must be a scalar. ## If unspecified, a length of 6 is assumed. Larger values of @var{n} result ## in a repetition of the above colors. ## @seealso{colormap} ## @end deftypefn ## PKG_ADD: colormap ("register", "gmap40"); ## PKG_DEL: colormap ("unregister", "gmap40"); function map = gmap40 (n = rows (colormap ())) if (nargin > 1) print_usage (); elseif (! isscalar (n)) error ("gmap40: N must be a scalar"); endif if (n > 0) C = [1, 0, 0; 0, 1, 0; 0, 0, 1; 1, 1, 0; 1, 0, 1; 0, 1, 1]; map = C(rem (0:(n-1), 6) + 1, :); else map = zeros (0, 3); endif endfunction %!demo %! ## Show the 'gmap40' colormap as an image %! image (1:6, linspace (0, 1, 6), repmat ((1:6)', 1, 6)); %! axis ([1, 6, 0, 1], "ticy", "xy"); %! colormap (gmap40 (6));