Mercurial > octave-nkf
view scripts/special-matrix/rosser.m @ 20611:40ed9b46a800
new octave_value::string_value method with optional error message
* ov.h (octave_value::string_vector): New method.
ov-base.cc, ov-base.h (octave_base_value::string_vector):
New default method.
ov-str-mat.cc, ov-str-mat.h (octave_char_matrix_str::string_value):
New method.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Thu, 08 Oct 2015 16:43:22 -0400 |
parents | 2645f9ef8c88 |
children |
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## Copyright (C) 1999-2015 Peter Ekberg ## ## This file is part of Octave. ## ## Octave is free software; you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or (at ## your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} rosser () ## Return the Rosser matrix. ## ## This is a difficult test case used to evaluate eigenvalue algorithms. ## @seealso{wilkinson, eig} ## @end deftypefn ## Author: Peter Ekberg ## (peda) function retval = rosser () if (nargin != 0) print_usage (); endif retval = [611, 196, -192, 407, -8, -52, -49, 29; 196, 899, 113, -192, -71, -43, -8, -44; -192, 113, 899, 196, 61, 49, 8, 52; 407, -192, 196, 611, 8, 44, 59, -23; -8, -71, 61, 8, 411, -599, 208, 208; -52, -43, 49, 44, -599, 411, 208, 208; -49, -8, 8, 59, 208, 208, 99, -911; 29, -44, 52, -23, 208, 208, -911, 99]; endfunction %!assert (size (rosser ()), [8,8]) %!assert (rosser ()([1, end]), [611, 99]) %!error (rosser (1))