Mercurial > octave-nkf
view scripts/image/bone.m @ 6791:be31a048c449
[project @ 2007-07-24 19:04:51 by dbateman]
author | dbateman |
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date | Tue, 24 Jul 2007 19:04:51 +0000 |
parents | c81a0f3f5a82 |
children | 93c65f2a5668 |
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## Copyright (C) 1999,2000 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 2, 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, write to the Free ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA ## 02110-1301, USA. ## -*- texinfo -*- ## @deftypefn {Function File} {} bone (@var{n}) ## Create color colormap. This colormap is a gray colormap with a light ## blue tone. The argument @var{n} should be a scalar. If it ## is omitted, the length of the current colormap or 64 is assumed. ## @seealso{colormap} ## @end deftypefn ## Author: Kai Habel <kai.habel@gmx.de> function map = bone (number) if (nargin == 0) number = rows (colormap); elseif (nargin == 1) if (! isscalar (number)) error ("bone: argument must be a scalar"); endif else print_usage (); endif if (number == 1) map = [0, 0, 0]; elseif (number > 1) x = linspace (0, 1, number)'; r = (x < 3/4) .* (7/8 * x) + (x >= 3/4) .* (11/8 * x - 3/8); g = (x < 3/8) .* (7/8 * x)\ + (x >= 3/8 & x < 3/4) .* (29/24 * x - 1/8)\ + (x >= 3/4) .* (7/8 * x + 1/8); b = (x < 3/8) .* (29/24 * x) + (x >= 3/8) .* (7/8 * x + 1/8); map = [r, g, b]; else map = []; endif endfunction