update packages

[CreaPhase.git] / octave_packages / m / deprecated / is_duplicate_entry.m

diff --git a/octave_packages/m/deprecated/is_duplicate_entry.m b/octave_packages/m/deprecated/is_duplicate_entry.m
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+## Copyright (C) 1996-2012 A. S. Hodel
+##
+## 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} {} is_duplicate_entry (@var{x})
+## Return non-zero if any entries in @var{x} are duplicates of one
+## another.
+## @seealso{unique}
+## @end deftypefn
+
+## Author: A. S. Hodel <scotte@eng.auburn.edu>
+
+function retval = is_duplicate_entry (x)
+
+  persistent warned = false;
+  if (! warned)
+    warned = true;
+    warning ("Octave:deprecated-function",
+             "is_duplicate_entry is obsolete and will be removed from a future version of Octave; see the function unique for equivalent functionality");
+  endif
+
+
+  if (nargin == 1)
+    if (ismatrix (x))
+      lx = numel (x);
+      lx1 = lx-1;
+      x = sort (reshape (x, 1, lx));
+      dx = x(1:lx1) - x(2:lx);
+      retval = sum (dx == 0);
+    else
+      error ("is_duplicate_entry: expecting matrix argument");
+    endif
+  else
+    print_usage ();
+  endif
+
+endfunction
+