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1 ## Copyright (C) 1995, 1996 Kurt Hornik |
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2 ## |
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3 ## This program is free software; you can redistribute it and/or modify |
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4 ## it under the terms of the GNU General Public License as published by |
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5 ## the Free Software Foundation; either version 2, or (at your option) |
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6 ## any later version. |
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7 ## |
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8 ## This program is distributed in the hope that it will be useful, but |
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9 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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11 ## General Public License for more details. |
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12 ## |
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13 ## You should have received a copy of the GNU General Public License |
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14 ## along with this file. If not, write to the Free Software Foundation, |
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15 ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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16 |
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17 ## -*- texinfo -*- |
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18 ## @deftypefn {Mapping Function} {} xor (@var{x}, @var{y}) |
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19 ## Return the `exclusive or' of the entries of @var{x} and @var{y}. |
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20 ## For boolean expressions @var{x} and @var{y}, |
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21 ## @code{xor (@var{x}, @var{y})} is true if and only if @var{x} or @var{y} |
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22 ## is true, but not if both @var{x} and @var{y} are true. |
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23 ## @end deftypefn |
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24 |
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25 ## Author: KH <Kurt.Hornik@ci.tuwien.ac.at> |
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26 ## Created: 16 September 1994 |
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27 ## Adapted-By: jwe |
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28 |
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29 function z = xor (x, y) |
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30 |
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31 if (nargin == 2) |
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32 if (is_scalar (x) || is_scalar (y) || size (x) == size (y)) |
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33 z = logical ((x | y) - (x & y)); |
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34 else |
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35 error ("xor: x and y must be of common size or scalars"); |
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36 endif |
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37 else |
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38 usage ("xor (x, y)"); |
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39 endif |
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40 |
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41 endfunction |
