Mercurial > octave
view scripts/elfun/sech.m @ 31217:1469658f769b
maint: Merge stable to default.
author | Markus Mützel <markus.muetzel@gmx.de> |
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date | Tue, 30 Aug 2022 18:27:00 +0200 |
parents | 83f9f8bda883 |
children | 597f3ee61a48 |
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######################################################################## ## ## Copyright (C) 1994-2022 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## 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 ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{y} =} sech (@var{x}) ## Compute the hyperbolic secant of each element of @var{x}. ## @seealso{asech} ## @end deftypefn function y = sech (x) if (nargin < 1) print_usage (); endif y = 1 ./ cosh (x); endfunction %!test %! x = [0, pi*i]; %! v = [1, -1]; %! assert (sech (x), v, sqrt (eps)); %!error <Invalid call> sech ()