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diff --git a/octave_packages/m/miscellaneous/rmappdata.m b/octave_packages/m/miscellaneous/rmappdata.m
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+## Copyright (C) 2010-2012 Ben Abbott
+##
+## 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 of the License, 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 Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {} rmappdata (@var{h}, @var{name})
+## Delete the named application data for the object(s) with
+## handle(s) @var{h}.
+## @end deftypefn
+
+## Author: Ben Abbott <bpabbott@mac.com>
+## Created: 2010-07-15
+
+function rmappdata (h, varargin)
+
+  if (! (all (ishandle (h)) && iscellstr (varargin)))
+    error ("rmappdata: invalid input");
+  endif
+
+  for nh = 1:numel(h)
+    appdata = get (h(nh), "__appdata__");
+    appdata = rmfield (appdata, varargin);
+    set (h(nh), "__appdata__", appdata);
+  endfor
+
+endfunction
+
+%!test
+%! setappdata (0, "hello", "world")
+%! rmappdata (0, "hello")
+%! assert (isappdata (0, "hello"), false)
+