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1 ## Copyright (C) 1995, 1996 Kurt Hornik |
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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 3 of the License, or (at |
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8 ## your option) 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, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## -*- texinfo -*- |
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20 ## @deftypefn {Mapping Function} {} xor (@var{x}, @var{y}) |
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21 ## Return the `exclusive or' of the entries of @var{x} and @var{y}. |
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22 ## For boolean expressions @var{x} and @var{y}, |
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23 ## @code{xor (@var{x}, @var{y})} is true if and only if @var{x} or @var{y} |
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24 ## is true, but not if both @var{x} and @var{y} are true. |
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25 ## @end deftypefn |
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26 |
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27 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> |
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28 ## Created: 16 September 1994 |
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29 ## Adapted-By: jwe |
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30 |
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31 function z = xor (x, y) |
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32 |
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33 if (nargin == 2) |
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34 if (isscalar (x) || isscalar (y) || size_equal (x, y)) |
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35 z = logical ((x | y) - (x & y)); |
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36 else |
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37 error ("xor: x and y must be of common size or scalars"); |
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38 endif |
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39 else |
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40 print_usage (); |
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41 endif |
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42 |
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43 endfunction |
