## Copyright (C) 1995, 1996  Kurt Hornik
##
## This file is part of Octave.
##
## Octave is free software; you can redistribute it and/or modify it
## under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2, or (at your option)
## any later version.
##
## Octave is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
## General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with Octave; see the file COPYING.  If not, write to the Free
## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
## 02110-1301, USA.

## -*- texinfo -*-
## @deftypefn {Mapping Function} {} xor (@var{x}, @var{y})
## Return the `exclusive or' of the entries of @var{x} and @var{y}.
## For boolean expressions @var{x} and @var{y},
## @code{xor (@var{x}, @var{y})} is true if and only if @var{x} or @var{y}
## is true, but not if both @var{x} and @var{y} are true.
## @end deftypefn

## Author: KH <Kurt.Hornik@ci.tuwien.ac.at>
## Created: 16 September 1994
## Adapted-By: jwe

function z = xor (x, y)

  if (nargin == 2)
    if (isscalar (x) || isscalar (y) || size (x) == size (y))
      z = logical ((x | y) - (x & y));
    else
      error ("xor: x and y must be of common size or scalars");
    endif
  else
    usage ("xor (x, y)");
  endif

endfunction