--- a/scripts/ChangeLog
+++ b/scripts/ChangeLog
@@ -1,3 +1,7 @@
+Mon Mar 24 16:49:47 1997  John W. Eaton  <jwe@bevo.che.wisc.edu>
+
+	* general/logical.m: New file.
+
 Sat Mar 15 15:07:30 1997  John W. Eaton  <jwe@bevo.che.wisc.edu>
 
 	* general/nextpow2.m: Correctly handle new meaning of is_scalar()

new file mode 100644
--- /dev/null
+++ b/scripts/general/logical.m
@@ -0,0 +1,40 @@
+## Copyright (C) 1996 John W. Eaton
+##
+## 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, 59 Temple Place - Suite 330, Boston, MA
+## 02111-1307, USA.
+
+## usage: logical (arg)
+##
+## Convert ARG to a logical value.  For example,
+##
+##   logical ([-1, 0, 1])
+##
+## is equivalent to
+##
+##   [-1, 0, 1] != 0
+
+## Author: jwe
+
+function y = logical (x)
+
+  if (nargin == 1)
+    y = x != 0;
+  else
+    usage ("logical (x)");
+  endif
+
+endfunction