/usr/share/plplot_octave/rgb2hls.m is in octave-plplot 5.9.9-2ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | ## Copyright (C) 1998-2003 Joao Cardoso.
##
## This program 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 of the License, or (at your
## option) any later version.
##
## This program 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.
##
## This file is part of plplot_octave.
## hsv = rgb2hls(rgb)
##
## red-green-blue to hue-lightness-saturation conversion.
## all components in the range [0..1]
function hls = rgb2hls(rgb)
[h, l, s] = plrgbhls(rgb(:,1), rgb(:,2), rgb(:,3));
hls = [h/360, l, s];
endfunction
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