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annotate scripts/general/is_duplicate_entry.m @ 3210:258d7b26c719

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[project @ 1998-11-05 04:00:42 by jwe]
author jwe
date Thu, 05 Nov 1998 04:00:42 +0000
parents
children f8dde1807dee
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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3210
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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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19
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20 ## Usage: is_duplicate_entry (x)
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21 ##
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22 ## Return non-zero if any entries in x are duplicates of one another.
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23
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24 ## Author: A. S. Hodel <scotte@eng.auburn.edu>
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25
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26 function retval = is_duplicate_entry (x)
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27
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28 if (nargin == 1)
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29 if (is_matrix (x))
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30 [m, n] = size (x);
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31 lx = m*n;
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32 lx1 = lx-1;
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33 x = sort (reshape (x, 1, lx));
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34 dx = x(1:lx1) - x(2:lx);
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35 retval = sum (dx == 0);
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36 else
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37 error ("is_duplicate_entry: expecting matrix argument");
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38 endif
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39 else
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40 usage ("is_duplicate_entry (x)");
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41 endif
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42
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43 endfunction
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44