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## Copyright (C) 1996 John W. Eaton
##
## 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, 59 Temple Place - Suite 330, Boston, MA
## 02111-1307, USA.
## Colormap.
## Author: Tony Richardson <arichard@stark.cc.oh.us>
## Created: July 1994
## Adapted-By: jwe
function map = ocean (number)
if (nargin == 0)
number = 64;
elseif (nargin == 1)
if (! is_scalar (number))
error ("ocean: argument must be a scalar");
endif
else
usage ("ocean (number)");
endif
cutin = fix (number/3);
dr = (number - 1) / cutin;
r = prepad ([0:dr:(number-1)], number)';
dg = (number - 1) / (2 * cutin);
g = prepad([0:dg:(number-1)], number)';
b = [0:(number-1)]';
map = [ r, g, b ] / (number - 1);
endfunction
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