1 ## Copyright (C) 1996-2012 A. S. Hodel
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
20 ## @deftypefn {Function File} {} is_duplicate_entry (@var{x})
21 ## Return non-zero if any entries in @var{x} are duplicates of one
26 ## Author: A. S. Hodel <scotte@eng.auburn.edu>
28 function retval = is_duplicate_entry (x)
30 persistent warned = false;
33 warning ("Octave:deprecated-function",
34 "is_duplicate_entry is obsolete and will be removed from a future version of Octave; see the function unique for equivalent functionality");
42 x = sort (reshape (x, 1, lx));
43 dx = x(1:lx1) - x(2:lx);
44 retval = sum (dx == 0);
46 error ("is_duplicate_entry: expecting matrix argument");