--- /dev/null
+## Copyright (C) 2006-2012 David Bateman
+##
+## 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} {} acotd (@var{x})
+## Compute the inverse cotangent in degrees for each element of @var{x}.
+## @seealso{cotd, acot}
+## @end deftypefn
+
+## Author: David Bateman <dbateman@free.fr>
+
+function y = acotd (x)
+ if (nargin != 1)
+ print_usage ();
+ endif
+ y = atand (1 ./ x);
+endfunction
+
+%!error(acotd())
+%!error(acotd(1,2))
+%!assert(acotd(0:10:90),180./pi.*acot(0:10:90),-10*eps)