Mercurial > octave-nkf
view scripts/general/is_duplicate_entry.m @ 5540:cda6a105ae9a before-ov-branch
[project @ 2005-11-17 05:47:13 by jwe]
author | jwe |
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date | Thu, 17 Nov 2005 05:47:13 +0000 |
parents | 4c8a2e4e0717 |
children | 34f96dd5441b |
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## Copyright (C) 1996, 1997 A. S. Hodel <scotte@eng.auburn.edu> ## ## 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 2, 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, write to the Free ## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA ## 02110-1301, USA. ## -*- texinfo -*- ## @deftypefn {Function File} {} is_duplicate_entry (@var{x}) ## Return non-zero if any entries in @var{x} are duplicates of one ## another. ## @end deftypefn ## Author: A. S. Hodel <scotte@eng.auburn.edu> function retval = is_duplicate_entry (x) 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 usage ("is_duplicate_entry (x)"); endif endfunction