1 ## Copyright (C) 1996-2012 John W. Eaton
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
20 ## @deftypefn {Function File} {} issquare (@var{x})
21 ## Return true if @var{x} is a square matrix.
22 ## @seealso{isscalar, isvector, ismatrix, size}
25 ## Author: A. S. Hodel <scotte@eng.auburn.edu>
26 ## Created: August 1993
29 function retval = issquare (x)
44 %!assert(issquare ([]));
45 %!assert(issquare (1));
46 %!assert(!(issquare ([1, 2])));
47 %!assert(issquare ([1, 2; 3, 4]));
48 %!assert(!(issquare ([1, 2; 3, 4; 5, 6])));
49 %!assert(!(issquare (ones (3,3,3))));
50 %!assert(issquare ("t"));
51 %!assert(!(issquare ("test")));
52 %!assert(issquare (["test"; "ing"; "1"; "2"]));
55 %! assert(issquare (s));
56 %!assert(issquare ({1, 2; 3, 4}));
57 %!assert(sparse (([1, 2; 3, 4])));
59 %% Test input validation
61 %!error issquare ([1, 2; 3, 4], 2);