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annotate scripts/general/is_square.m @ 2311:2b5788792cad

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[project @ 1996-07-11 20:18:38 by jwe]
author jwe
date Thu, 11 Jul 1996 20:18:38 +0000
parents 5cffc4b8de57
children 204cc7db6f4a
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1 ### Copyright (C) 1996 John W. Eaton
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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 ## usage: is_square (x)
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21 ##
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22 ## If x is square, then return value is the dimension of x.
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23 ## otherwise, returns a value of 0
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24 ##
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25 ## See also: size, rows, columns, length, is_matrix, is_scalar, is_vector
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27 function retval = is_square (x)
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29 ## Written by A. S. Hodel (scotte@eng.auburn.edu) August 1993.
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31 if (nargin == 1)
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32 [nr, nc] = size (x);
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33 if (nr == nc)
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34 retval = nr;
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35 else
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36 retval = 0;
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37 endif
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38 else
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39 usage ("is_square (x)");
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40 endif
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41
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42 endfunction