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## Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2002, 2005, 2006,
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## This file is part of Octave.
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## Octave is free software; you can redistribute it and/or modify it
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## under the terms of the GNU General Public License as published by
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## the Free Software Foundation; either version 3 of the License, or (at
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## your option) any later version.
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## Octave is distributed in the hope that it will be useful, but
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## WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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## General Public License for more details.
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## You should have received a copy of the GNU General Public License
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## along with Octave; see the file COPYING. If not, see
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## <http://www.gnu.org/licenses/>.
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## @deftypefn {Function File} {} ocean (@var{n})
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## Create color colormap. The argument @var{n} should be a scalar. If it
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## is omitted, the length of the current colormap or 64 is assumed.
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## Author: Tony Richardson <arichard@stark.cc.oh.us>
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function map = ocean (number)
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number = rows (colormap);
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if (! isscalar (number))
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error ("ocean: argument must be a scalar");
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cutin = fix (number/3);
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dr = (number - 1) / cutin;
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r = prepad ([0:dr:(number-1)], number)';
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dg = (number - 1) / (2 * cutin);
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g = prepad([0:dg:(number-1)], number)';
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map = [ r, g, b ] / (number - 1);