Mercurial > octave-nkf
view scripts/specfun/realsqrt.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 | 2645f9ef8c88 |
children |
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## Copyright (C) 2008-2015 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} {} realsqrt (@var{x}) ## Return the real-valued square root of each element of @var{x}. ## ## If any element results in a complex return value @code{realsqrt} aborts and ## issues an error. ## @seealso{sqrt, realpow, reallog} ## @end deftypefn function y = realsqrt (x) if (nargin != 1) print_usage (); elseif (iscomplex (x) || any (x(:) < 0)) error ("realsqrt: produced complex result"); else y = sqrt (x); endif endfunction %!assert (realsqrt (1:5), sqrt (1:5)) %!test %! x = rand (10, 10); %! assert (realsqrt (x), sqrt (x)); %!error realsqrt () %!error realsqrt (1,2) %!error <produced complex result> realsqrt (-1)