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1 # Copyright (C) 1995 John W. Eaton |
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2 # |
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3 # This file is part of Octave. |
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4 # |
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5 # Octave is free software; you can redistribute it and/or modify it |
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6 # under the terms of the GNU General Public License as published by the |
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7 # Free Software Foundation; either version 2, or (at your option) any |
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8 # later version. |
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9 # |
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10 # Octave is distributed in the hope that it will be useful, but WITHOUT |
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11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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13 # for more details. |
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14 # |
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15 # You should have received a copy of the GNU General Public License |
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16 # along with Octave; see the file COPYING. If not, write to the Free |
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17 # Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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18 |
1024
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19 function map = ocean (number) |
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20 |
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21 # Colormap. |
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22 |
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23 # Written by Tony Richardson (amr@mpl.ucsd.edu) July 1994. |
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24 |
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25 if (nargin == 0) |
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26 number = 64; |
1024
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27 elseif (nargin == 1) |
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28 if (! is_scalar (number)) |
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29 error ("ocean: argument must be a scalar"); |
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30 endif |
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31 else |
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32 usage ("ocean (number)"); |
559
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33 endif |
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34 |
1024
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35 cutin = fix (number/3); |
559
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36 |
1024
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37 dr = (number - 1) / cutin; |
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38 |
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39 r = prepad ([0:dr:(number-1)], number)'; |
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40 |
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41 dg = (number - 1) / (2 * cutin); |
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42 |
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43 g = prepad([0:dg:(number-1)], number)'; |
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44 |
559
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45 b = [0:(number-1)]'; |
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46 |
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47 map = [ r, g, b ] / (number - 1); |
559
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48 |
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49 endfunction |