view scripts/elfun/csc.m @ 28238:50d83252f867 stable

axis.m: Update documentation. * axis.m: Update documentation to show calling forms with a space between the command and the axes to be affected (x|y|z) such as "tic x".
author Rik <rik@octave.org>
date Fri, 24 Apr 2020 13:04:08 -0700
parents bd51beb6205e
children d8318c12d903 0a5b15007766
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########################################################################
##
## Copyright (C) 1994-2020 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 {} {} csc (@var{x})
## Compute the cosecant for each element of @var{x} in radians.
## @seealso{acsc, cscd, csch}
## @end deftypefn

function y = csc (x)

  if (nargin != 1)
    print_usage ();
  endif

  y = 1 ./ sin (x);

endfunction


%!test
%! rt2 = sqrt (2);
%! rt3 = sqrt (3);
%! x = [pi/6, pi/4, pi/3, pi/2, 2*pi/3, 3*pi/4, 5*pi/6];
%! v = [2, rt2, 2*rt3/3, 1, 2*rt3/3, rt2, 2];
%! assert (csc (x), v, sqrt (eps));

%!error csc ()
%!error csc (1, 2)