## Mercurial > hg > octave-max

### view scripts/elfun/secd.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) 2006-2012 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} {} secd (@var{x}) ## Compute the secant for each element of @var{x} in degrees. ## @seealso{asecd, sec} ## @end deftypefn ## Author: David Bateman <dbateman@free.fr> function y = secd (x) if (nargin != 1) print_usage (); endif y = 1 ./ cosd (x); endfunction %!assert (secd (0:10:80), sec (pi*[0:10:80]/180), -10*eps) %!assert (secd ([0, 180, 360]) != Inf) %!assert (secd ([90, 270]) == Inf) %!error secd () %!error secd (1, 2)