Mercurial > octave-nkf
view scripts/elfun/asec.m @ 20639:a260a6acb70f
fix test failures introduced by a22d8a2eb0e5
* scripts/ode/private/integrate_adaptive.m: fix stepping backwards, fix
invocation of OutputFcn, fix text of some error messages
* scripts/ode/private/integrate_const.m: remove use of option OutputSave
* scripts/ode/private/integrate_n_steps.m: remove use of option OutputSave
author | Carlo de Falco <carlo.defalco@polimi.it> |
---|---|
date | Sun, 11 Oct 2015 23:09:01 +0200 |
parents | 4197fc428c7d |
children |
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## Copyright (C) 1994-2015 John W. Eaton ## ## 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 {Mapping Function} {} asec (@var{x}) ## Compute the inverse secant in radians for each element of @var{x}. ## @seealso{sec, asecd} ## @end deftypefn ## Author: jwe function y = asec (x) if (nargin != 1) print_usage (); endif y = acos (1 ./ x); endfunction %!test %! rt2 = sqrt (2); %! rt3 = sqrt (3); %! v = [0, pi/6, pi/4, pi/3, 2*pi/3, 3*pi/4, 5*pi/6, pi]; %! x = [1, 2*rt3/3, rt2, 2, -2, -rt2, -2*rt3/3, -1]; %! assert (asec (x), v, sqrt (eps)); %!error asec () %!error asec (1, 2)