Mercurial > octave
annotate scripts/elfun/sind.m @ 27919:1891570abac8
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2020.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 06 Jan 2020 22:29:51 -0500 |
parents | b442ec6dda5c |
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update Octave Project Developers copyright for the new year
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1 ## Copyright (C) 2006-2020 The Octave Project Developers |
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2 ## |
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3 ## See the file COPYRIGHT.md in the top-level directory of this distribution |
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4 ## or <https://octave.org/COPYRIGHT.html/>. |
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5 ## |
6239 | 6 ## |
6440 | 7 ## This file is part of Octave. |
6239 | 8 ## |
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9 ## Octave is free software: you can redistribute it and/or modify it |
6440 | 10 ## under the terms of the GNU General Public License as published by |
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11 ## the Free Software Foundation, either version 3 of the License, or |
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12 ## (at your option) any later version. |
6440 | 13 ## |
14 ## Octave is distributed in the hope that it will be useful, but | |
15 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
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16 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 ## GNU General Public License for more details. |
6239 | 18 ## |
19 ## You should have received a copy of the GNU General Public License | |
7016 | 20 ## along with Octave; see the file COPYING. If not, see |
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21 ## <https://www.gnu.org/licenses/>. |
6239 | 22 |
23 ## -*- texinfo -*- | |
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24 ## @deftypefn {} {} sind (@var{x}) |
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25 ## Compute the sine for each element of @var{x} in degrees. |
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26 ## |
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27 ## Returns zero for elements where @code{@var{x}/180} is an integer. |
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28 ## @seealso{asind, sin} |
6239 | 29 ## @end deftypefn |
30 | |
7017 | 31 ## Author: David Bateman <dbateman@free.fr> |
32 | |
6239 | 33 function y = sind (x) |
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34 |
6239 | 35 if (nargin != 1) |
36 print_usage (); | |
37 endif | |
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38 |
6239 | 39 I = x / 180; |
40 y = sin (I .* pi); | |
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41 y(I == fix (I) & isfinite (I)) = 0; |
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42 |
6239 | 43 endfunction |
44 | |
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45 |
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46 %!assert (sind (10:10:90), sin (pi*[10:10:90]/180), -10*eps) |
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47 %!assert (sind ([0, 180, 360]) == 0) |
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48 %!assert (sind ([90, 270]) != 0) |
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49 |
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50 %!error sind () |
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51 %!error sind (1, 2) |