## Mercurial > hg > octave-max

### view scripts/elfun/csch.m @ 15489:481417a57a2d

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improve sign and signbit docs
* mappers.cc (Fsign): Note sign (-0) is 0. Add @seealso for signbit.
(Fsignbit): Add @seealso for sign.

author | John W. Eaton <jwe@octave.org> |
---|---|

date | Thu, 04 Oct 2012 10:20:59 -0400 |

parents | f3d52523cde1 |

children |

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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} {} csch (@var{x}) ## Compute the hyperbolic cosecant of each element of @var{x}. ## @seealso{acsch} ## @end deftypefn ## Author: jwe function y = csch (x) if (nargin != 1) print_usage (); endif y = 1 ./ sinh (x); endfunction %!test %! x = [pi/2*i, 3*pi/2*i]; %! v = [-i, i]; %! assert (csch (x), v, sqrt (eps)); %!error csch () %!error csch (1, 2)