Mercurial > octave-nkf
view scripts/elfun/asech.m @ 16033:23a7661e529a ss-3-7-2
snapshot version 3.7.2
* configure.ac (AC_INIT): Set version to 3.7.2.
(OCTAVE_RELEASE_DATE): Set to 2013-02-09.
(OCTAVE_COPYRIGHT): Update year.
author | John W. Eaton <jwe@octave.org> |
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date | Sun, 10 Feb 2013 00:59:19 -0500 |
parents | f3d52523cde1 |
children | d63878346099 |
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## Copyright (C) 1994-2012 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} {} asech (@var{x}) ## Compute the inverse hyperbolic secant of each element of @var{x}. ## @seealso{sech} ## @end deftypefn ## Author: jwe function y = asech (x) if (nargin != 1) print_usage (); endif y = acosh (1 ./ x); endfunction %!test %! v = [0, pi*i]; %! x = [1, -1]; %! assert (asech (x), v, sqrt (eps)); %!error asech () %!error asech (1, 2)