Mercurial > octave-nkf

annotate scripts/elfun/sind.m @ 14138:72c96de7a403 stable

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
maint: update copyright notices for 2012
author John W. Eaton <jwe@octave.org>
date Mon, 02 Jan 2012 14:25:41 -0500
parents 49ae6f497171
children 5a13a75c2457
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
14138
72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
parents: 13286
diff changeset
1 ## Copyright (C) 2006-2012 David Bateman
6239
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
2 ##
6440
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe]
jwe
parents: 6239
diff changeset
3 ## This file is part of Octave.
6239
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
4 ##
6440
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe]
jwe
parents: 6239
diff changeset
5 ## Octave is free software; you can redistribute it and/or modify it
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe]
jwe
parents: 6239
diff changeset
6 ## under the terms of the GNU General Public License as published by
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6440
diff changeset
7 ## the Free Software Foundation; either version 3 of the License, or (at
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6440
diff changeset
8 ## your option) any later version.
6440
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe]
jwe
parents: 6239
diff changeset
9 ##
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe]
jwe
parents: 6239
diff changeset
10 ## Octave is distributed in the hope that it will be useful, but
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe]
jwe
parents: 6239
diff changeset
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe]
jwe
parents: 6239
diff changeset
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
98ee80702bca [project @ 2007-03-23 15:13:19 by jwe]
jwe
parents: 6239
diff changeset
13 ## General Public License for more details.
6239
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
14 ##
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
15 ## You should have received a copy of the GNU General Public License
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6440
diff changeset
16 ## along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6440
diff changeset
17 ## <http://www.gnu.org/licenses/>.
6239
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
18
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
19 ## -*- texinfo -*-
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
20 ## @deftypefn {Function File} {} sind (@var{x})
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
21 ## Compute the sine for each element of @var{x} in degrees. Returns zero
9155
ad20b967e1c9 Update section 17.3 (Trigonometry) of arith.txi
Rik <rdrider0-list@yahoo.com>
parents: 7017
diff changeset
22 ## for elements where @code{@var{x}/180} is an integer.
ad20b967e1c9 Update section 17.3 (Trigonometry) of arith.txi
Rik <rdrider0-list@yahoo.com>
parents: 7017
diff changeset
23 ## @seealso{asind, sin}
6239
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
24 ## @end deftypefn
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
25
7017
a1dbe9d80eee [project @ 2007-10-12 21:27:11 by jwe]
jwe
parents: 7016
diff changeset
26 ## Author: David Bateman <dbateman@free.fr>
a1dbe9d80eee [project @ 2007-10-12 21:27:11 by jwe]
jwe
parents: 7016
diff changeset
27
6239
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
28 function y = sind (x)
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
29 if (nargin != 1)
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
30 print_usage ();
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
31 endif
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
32 I = x / 180;
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
33 y = sin (I .* pi);
13286
49ae6f497171 Use common code idiom x == fix (x) to detect integers
Rik <octave@nomad.inbox5.com>
parents: 11587
diff changeset
34 y(I == fix (I) & finite (I)) = 0;
6239
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
35 endfunction
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
36
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
37 %!error(sind())
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
38 %!error(sind(1,2))
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
39 %!assert(sind(10:10:90),sin(pi*[10:10:90]/180),-10*eps)
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
40 %!assert(sind([0,180,360]) == 0)
82185e38eea8 [project @ 2007-01-10 22:53:58 by jwe]
jwe
parents:
diff changeset
41 %!assert(sind([90,270]) != 0)