Mercurial > octave-nkf
view scripts/linear-algebra/isdiag.m @ 20596:87b557ee8e5d
clean up and vectorize code for dense output in ode45
* scripts/ode/private/ode_rk_interpolate.m: new file
* scripts/ode/private/ode_rk_interpolate.m(hermite_quartic_interpolation):
move to internal function, use vectorization and broadcasting.
* scripts/ode/private/hermite_quartic_interpolation.m: remove file
* scripts/ode/module.mk: list added and removed files
* scripts/ode/private/integrate_adaptive.m: use new interpolation code.
author | Carlo de Falco <carlo.defalco@polimi.it> |
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date | Tue, 06 Oct 2015 19:28:59 +0200 |
parents | 9fc020886ae9 |
children |
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## Copyright (C) 2014-2015 Massimiliano Fasi ## ## 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} {} isdiag (@var{A}) ## Return true if @var{A} is a diagonal matrix. ## @seealso{isbanded, istril, istriu, diag, bandwidth} ## @end deftypefn ## Author: Massimiliano Fasi function retval = isdiag (A) if (nargin != 1) print_usage (); endif retval = (isnumeric (A) || islogical (A)) && ndims (A) == 2; if (retval) [i, j] = find (A); retval = all (i == j); endif endfunction %!assert (! isdiag ("string")) %!assert (isdiag ([])) %!assert (isdiag (1)) %!assert (! isdiag ([1, 1])) %!assert (! isdiag ([1; 1])) %!assert (isdiag (eye (10))) %!assert (issymmetric ([i, 0; 0, 1 + i])) %!assert (isdiag (speye (1000000))) %!assert (isdiag (logical (eye (10)))) ## Test input validation %!error isdiag () %!error isdiag (1,2)