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2313
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1 ## Copyright (C) 1996 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 |
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7 ## the Free Software Foundation; either version 2, or (at your option) |
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8 ## any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License 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 |
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18 ## 02111-1307, USA. |
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559
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19 |
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2311
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20 ## Colormap. |
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1024
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21 |
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2312
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22 ## Author: Tony Richardson <amr@mpl.ucsd.edu> |
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23 ## Created: July 1994 |
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24 ## Adapted-By: jwe |
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1024
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25 |
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2312
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26 function map = ocean (number) |
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1024
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27 |
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28 if (nargin == 0) |
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559
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29 number = 64; |
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1024
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30 elseif (nargin == 1) |
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31 if (! is_scalar (number)) |
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32 error ("ocean: argument must be a scalar"); |
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33 endif |
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34 else |
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35 usage ("ocean (number)"); |
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559
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36 endif |
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37 |
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1024
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38 cutin = fix (number/3); |
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2325
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39 |
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1024
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40 dr = (number - 1) / cutin; |
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41 |
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42 r = prepad ([0:dr:(number-1)], number)'; |
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43 |
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44 dg = (number - 1) / (2 * cutin); |
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45 |
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46 g = prepad([0:dg:(number-1)], number)'; |
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47 |
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559
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48 b = [0:(number-1)]'; |
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49 |
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1024
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50 map = [ r, g, b ] / (number - 1); |
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559
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51 |
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52 endfunction |
