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1024
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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, 675 Mass Ave, Cambridge, MA 02139, USA. |
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559
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18 |
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1024
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19 function map = gray (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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559
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26 number = 64; |
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1024
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27 elseif (nargin > 1) |
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28 usage ("gray (number)"); |
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559
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29 endif |
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30 |
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31 gr = [0:(number-1)]'; |
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32 |
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1024
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33 map = [ gr, gr, gr ] / (number - 1); |
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559
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34 |
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35 endfunction |
