new file mode 100644
--- /dev/null
+++ b/scripts/general/isdir.m
@@ -0,0 +1,31 @@
+## Copyright (C) 2004 Alois Schloegl 
+##
+## 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 {Function File} {} isdir (@var{f})
+## Return true if @var{f} is a directory.
+## @end deftypefn
+
+function t = isdir (x)
+  if (nargin == 1)
+    t = exist (x, "dir");
+  else
+    print_usage ("isdir");
+  endif
+endfunction