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annotate scripts/general/is_square.m @ 2957:17c69c89fe93

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[project @ 1997-05-09 18:43:21 by jwe]
author jwe
date Fri, 09 May 1997 18:43:21 +0000
parents 8b262e771614
children a998db745232
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1 ## Copyright (C) 1996, 1997 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 ## Author: A. S. Hodel <scotte@eng.auburn.edu>
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28 ## Created: August 1993
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29 ## Adapted-By: jwe
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31 function retval = is_square (x)
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32
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33 if (nargin == 1)
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34 [nr, nc] = size (x);
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35 if (nr == nc && nr > 0)
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36 retval = nr;
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37 else
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38 retval = 0;
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39 endif
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40 else
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41 usage ("is_square (x)");
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42 endif
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43
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44 endfunction