Mercurial > octave-nkf
view scripts/image/copper.m @ 20639:a260a6acb70f
fix test failures introduced by a22d8a2eb0e5
* scripts/ode/private/integrate_adaptive.m: fix stepping backwards, fix
invocation of OutputFcn, fix text of some error messages
* scripts/ode/private/integrate_const.m: remove use of option OutputSave
* scripts/ode/private/integrate_n_steps.m: remove use of option OutputSave
author | Carlo de Falco <carlo.defalco@polimi.it> |
---|---|
date | Sun, 11 Oct 2015 23:09:01 +0200 |
parents | 7503499a252b |
children |
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## Copyright (C) 1999-2015 Kai Habel ## ## 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} =} copper () ## @deftypefnx {Function File} {@var{map} =} copper (@var{n}) ## Create color colormap. This colormap varies from black to a light copper ## tone. ## ## The argument @var{n} must be a scalar. ## If unspecified, the length of the current colormap, or 64, is used. ## @seealso{colormap} ## @end deftypefn ## Author: Kai Habel <kai.habel@gmx.de> ## PKG_ADD: colormap ("register", "copper"); ## PKG_DEL: colormap ("unregister", "copper"); function map = copper (n = rows (colormap ())) if (nargin > 1) print_usage (); elseif (! isscalar (n)) error ("copper: N must be a scalar"); endif n = double (n); if (n == 1) map = [0, 0, 0]; elseif (n > 1) x = [0:(n-1)]' / (n - 1); r = (x < 4/5) .* (5/4 * x) ... + (x >= 4/5); g = 0.7812 * x; b = 0.4975 * x; map = [r, g, b]; else map = zeros (0, 3); endif endfunction %!demo %! ## Show the 'copper' colormap as an image %! image (1:64, linspace (0, 1, 64), repmat ((1:64)', 1, 64)); %! axis ([1, 64, 0, 1], "ticy", "xy"); %! colormap (copper (64));