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annotate scripts/general/is_duplicate_entry.m @ 5018:1c65a8e44ef9 ss-2-1-59

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[project @ 2004-09-22 03:33:29 by jwe]
author jwe
date Wed, 22 Sep 2004 03:33:29 +0000
parents a0997c4d1d54
children 4c8a2e4e0717
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1 ## Copyright (C) 1996, 1997 A. S. Hodel <scotte@eng.auburn.edu>
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 2, or (at your option)
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8 ## any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, write to the Free
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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18 ## 02111-1307, USA.
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20 ## -*- texinfo -*-
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21 ## @deftypefn {Function File} {} is_duplicate_entry (@var{x})
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22 ## Return non-zero if any entries in @var{x} are duplicates of one
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23 ## another.
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24 ## @end deftypefn
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26 ## Author: A. S. Hodel <scotte@eng.auburn.edu>
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27
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28 function retval = is_duplicate_entry (x)
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30 if (nargin == 1)
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31 if (ismatrix (x))
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32 lx = numel (x);
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33 lx1 = lx-1;
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34 x = sort (reshape (x, 1, lx));
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35 dx = x(1:lx1) - x(2:lx);
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36 retval = sum (dx == 0);
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37 else
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38 error ("is_duplicate_entry: expecting matrix argument");
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39 endif
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40 else
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41 usage ("is_duplicate_entry (x)");
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42 endif
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43
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44 endfunction
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