Mercurial > octave-nkf
view scripts/elfun/cosd.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> |
---|---|
date | Tue, 06 Oct 2015 19:28:59 +0200 |
parents | 83792dd9bcc1 |
children |
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## Copyright (C) 2006-2015 David Bateman ## ## 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} {} cosd (@var{x}) ## Compute the cosine for each element of @var{x} in degrees. ## ## Returns zero for elements where @code{(@var{x}-90)/180} is an integer. ## @seealso{acosd, cos} ## @end deftypefn ## Author: David Bateman <dbateman@free.fr> function y = cosd (x) if (nargin != 1) print_usage (); endif I = x / 180; y = cos (I .* pi); I += 0.5; y(I == fix (I) & isfinite (I)) = 0; endfunction %!assert (cosd (0:10:80), cos (pi*[0:10:80]/180), -10*eps) %!assert (cosd ([0, 180, 360]) != 0) %!assert (cosd ([90, 270]) == 0) %!error cosd () %!error cosd (1, 2)