--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/miscellaneous/xor.m	Tue Nov 19 21:44:36 1996 +0000
@@ -0,0 +1,39 @@
+## Copyright (C) 1995, 1996  Kurt Hornik
+## 
+## This program 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.
+## 
+## This program 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 this file.  If not, write to the Free Software Foundation,
+## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+## usage:  xor (x, y)
+##
+## Returns the "exclusive or" of the entries of x and y.
+## For boolean expressions x and y, xor (x, y) is true iff either x
+## or y is true.
+
+## Author: KH <Kurt.Hornik@ci.tuwien.ac.at>
+## Created: 16 September 1994
+## Adapted-By: jwe
+
+function z = xor (x, y)
+
+  if (nargin != 2)
+    usage ("xor (x, y)");
+  endif
+
+  if (is_scalar (x) || is_scalar (y) || size (x) == size (y))  
+    error ("xor: x and y must be of common size or scalars");
+  endif
+  
+  z = (x | y) - (x & y);
+  
+endfunction