Mercurial > octave-nkf
view scripts/elfun/sind.m @ 20643:d6d04088ac9e
nbininv.m: Increase speed (85X) and accuracy of function (bug #34363).
* nbininv.m: Call new function scalar_nbininv to calculate nbininv for scalar.
If there are still uncalculated values then call bin_search_nbininv. Call
bin_search_nbininv directly for vectors. Add more BIST tests.
* nbininv.m (scalar_binoinv): New subfunction to calculate nbininv for scalar x.
Stops when x > 1000.
* nbininv.m (bin_search_nbininv): New subfunction to do binary search for nbininv.
author | Lachlan Andrew <lachlanbis@gmail.com> |
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date | Sun, 11 Oct 2015 20:33:37 -0700 |
parents | 7503499a252b |
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} {} sind (@var{x}) ## Compute the sine for each element of @var{x} in degrees. ## ## Returns zero for elements where @code{@var{x}/180} is an integer. ## @seealso{asind, sin} ## @end deftypefn ## Author: David Bateman <dbateman@free.fr> function y = sind (x) if (nargin != 1) print_usage (); endif I = x / 180; y = sin (I .* pi); y(I == fix (I) & isfinite (I)) = 0; endfunction %!assert (sind (10:10:90), sin (pi*[10:10:90]/180), -10*eps) %!assert (sind ([0, 180, 360]) == 0) %!assert (sind ([90, 270]) != 0) %!error sind () %!error sind (1, 2)