--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/general/isequaln.m	Tue Jul 09 14:39:39 2013 -0700
@@ -0,0 +1,50 @@
+## Copyright (C) 2005-2012 William Poetra Yoga Hadisoeseno
+##
+## 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 3 of the License, 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, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} isequaln (@var{x1}, @var{x2}, @dots{})
+## Return true if all of @var{x1}, @var{x2}, @dots{} are equal under the
+## additional assumption that NaN == NaN (no comparison of NaN placeholders
+## in dataset).
+## @seealso{isequal}
+## @end deftypefn
+
+function retval = isequaln (x1, varargin)
+
+  if (nargin < 2)
+    print_usage ();
+  endif
+
+  retval = __isequal__ (true, x1, varargin{:});
+
+endfunction
+
+
+## test for equality
+%!assert (isequaln ({1,2,NaN,4},{1,2,NaN,4}), true)
+%!assert (isequaln ([1,2,NaN,4],[1,2,NaN,4]), true)
+## test for inequality
+%!assert (isequaln ([1,2,NaN,4],[1,NaN,3,4]), false)
+%!assert (isequaln ([1,2,NaN,4],[1,2,3,4]), false)
+## test for equality (struct)
+%!assert (isequaln (struct ('a',NaN,'b',2),struct ('a',NaN,'b',2),struct ('a',NaN,'b',2)), true)
+%!assert (isequaln (1,2,1), false)
+
+## Input validation
+%!error isequaln ()
+%!error isequaln (1)