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diff --git a/octave_packages/m/deprecated/cor.m b/octave_packages/m/deprecated/cor.m
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+## Copyright (C) 1995-2012 Kurt Hornik
+##
+## 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} {} cor (@var{x})
+## @deftypefnx {Function File} {} cor (@var{x}, @var{y})
+## Compute matrix of correlation coefficients.
+##
+## This is an alias for @code{corrcoef}.
+## @seealso{corrcoef}
+## @end deftypefn
+
+function retval = cor (x, y = x)
+
+  persistent warned = false;
+  if (! warned)
+    warned = true;
+    warning ("Octave:deprecated-function",
+             "cor is obsolete and will be removed from a future version of Octave; please use corr instead");
+  endif
+
+  if (nargin < 1 || nargin > 2)
+    print_usage ();
+  endif
+
+  retval = corrcoef (x, y);
+
+endfunction
+
+
+%!test
+%! x = rand (10, 2);
+%! assert (cor (x), corrcoef (x), 5*eps);
+%! assert (cor (x(:,1), x(:,2)) == corrcoef (x(:,1), x(:,2)));
+
+%% Test input validation
+%!error corrcoef ();
+%!error corrcoef (1, 2, 3);
+