Mercurial > octave-nkf
view scripts/image/autumn.m @ 20584:eb9e2d187ed2
maint: Use Octave coding conventions in scripts/ode/private dir.
* AbsRel_Norm.m, fuzzy_compare.m, hermite_quartic_interpolation.m,
integrate_adaptive.m, integrate_const.m, integrate_n_steps.m, kahan.m,
ode_struct_value_check.m, odepkg_event_handle.m, odepkg_structure_check.m,
runge_kutta_45_dorpri.m, starting_stepsize.m:
Wrap long lines to < 80 chars.
Use double quotes rather than single quotes where possible.
Use ';' at end of keywords "return;" and "break;"
Use '##" for stand-alone comments and '#' for end-of-line comments.
Use two spaces after period before starting new sentence.
Use '!' instead of '~' for logical negation.
Use specific form of end (endif, endfor, etc.).
Don't use line continuation marker '...' unless necessary.
author | Rik <rik@octave.org> |
---|---|
date | Sun, 04 Oct 2015 22:18:54 -0700 |
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} =} autumn () ## @deftypefnx {Function File} {@var{map} =} autumn (@var{n}) ## Create color colormap. ## This colormap ranges from red through orange to yellow. ## ## 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", "autumn"); ## PKG_DEL: colormap ("unregister", "autumn"); function map = autumn (n = rows (colormap ())) if (nargin > 1) print_usage (); elseif (! isscalar (n)) error ("autumn: N must be a scalar"); endif n = double (n); if (n == 1) map = [1, 0, 0]; elseif (n > 1) r = ones (n, 1); g = [0:(n-1)]' / (n - 1); b = zeros (n, 1); map = [r, g, b]; else map = zeros (0, 3); endif endfunction %!demo %! ## Show the 'autumn' colormap as an image %! image (1:64, linspace (0, 1, 64), repmat ((1:64)', 1, 64)); %! axis ([1, 64, 0, 1], "ticy", "xy"); %! colormap (autumn (64));