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annotate scripts/general/is_square.m @ 245:16a24e76d6e0

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[project @ 1993-12-03 02:00:15 by jwe]
author jwe
date Fri, 03 Dec 1993 02:00:15 +0000
parents 0fda6e1f90e0
children 3470f1e25a79
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1 # Copyright (C) 1993 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 the
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7 # Free Software Foundation; either version 2, or (at your option) any
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8 # later version.
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9 #
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10 # Octave is distributed in the hope that it will be useful, but WITHOUT
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11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 # 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, 675 Mass Ave, Cambridge, MA 02139, USA.
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18
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19 function retval = is_square (x)
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20
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21 # usage: is_square (x)
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22 #
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23 # If x is square, then return value is the dimension of x.
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24 # otherwise, returns a value of 0
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25 #
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26 # See also: size, rows, columns, length, is_matrix, is_scalar, is_vector
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27
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28 # Written by A. S. Hodel (scotte@eng.auburn.edu) August 1993.
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30 if (nargin == 1)
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31 [nr, nc] = size (x);
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32 if (nr == nc)
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33 retval = nr;
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34 else
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35 retval = 0;
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36 endif
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37 else
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38 error ("usage: is_square (x)");
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39 endif
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40
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41 endfunction