Mercurial > octave-nkf
view scripts/special-matrix/rosser.m @ 20584:eb9e2d187ed2
maint: Use Octave coding conventions in scripts/ode/private dir.
* AbsRel_Norm.m, fuzzy_compare.m, hermite_quartic_interpolation.m,
integrate_adaptive.m, integrate_const.m, integrate_n_steps.m, kahan.m,
ode_struct_value_check.m, odepkg_event_handle.m, odepkg_structure_check.m,
runge_kutta_45_dorpri.m, starting_stepsize.m:
Wrap long lines to < 80 chars.
Use double quotes rather than single quotes where possible.
Use ';' at end of keywords "return;" and "break;"
Use '##" for stand-alone comments and '#' for end-of-line comments.
Use two spaces after period before starting new sentence.
Use '!' instead of '~' for logical negation.
Use specific form of end (endif, endfor, etc.).
Don't use line continuation marker '...' unless necessary.
author | Rik <rik@octave.org> |
---|---|
date | Sun, 04 Oct 2015 22:18:54 -0700 |
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))