1## Copyright (C) 2004-2020 Andrew Collier <abcollier@users.sourceforge.net>
2##
3## This program is free software; you can redistribute it and/or modify it under
4## the terms of the GNU General Public License as published by the Free Software
5## Foundation; either version 3 of the License, or (at your option) any later
6## version.
7##
8## This program is distributed in the hope that it will be useful, but WITHOUT
9## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
11## details.
12##
13## You should have received a copy of the GNU General Public License along with
14## this program; if not, see <http://www.gnu.org/licenses/>.
15
16## -*- texinfo -*-
17## @deftypefn  {Function File} {} deg2rad (@var{anglin})
18## @deftypefnx {Function File} {} degtorad (@var{anglin})
19## Converts angles input in degrees to the equivalent in radians.
20##
21## @seealso{rad2deg, unitsratio}
22## @end deftypefn
23
24## Author: Andrew Collier <abcollier@users.sourceforge.net>
25
26function anglout = deg2rad (anglin)
27  if (nargin != 1)
28    print_usage ();
29  endif
30  persistent ratio = unitsratio ("radians", "degrees");
31  anglout = anglin * ratio;
32endfunction
33
34%!assert (deg2rad(180),pi,10*eps)
35