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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, 59 Temple Place - Suite 330, Boston, MA
- ## 02111-1307, USA.
-
- ## Usage: is_duplicate_entry (x)
- ##
- ## Return non-zero if any entries in x are duplicates of one another.
-
- ## Author: A. S. Hodel <scotte@eng.auburn.edu>
-
- function retval = is_duplicate_entry (x)
-
- if (nargin == 1)
- if (is_matrix (x))
- [m, n] = size (x);
- lx = m*n;
- 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
-
-