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annotate scripts/elfun/sind.m @ 11523:fd0a3ac60b0e

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update copyright notices
author John W. Eaton <jwe@octave.org>
date Fri, 14 Jan 2011 05:47:45 -0500
parents 16f53d29049f
children c792872f8942
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11523
fd0a3ac60b0e update copyright notices
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2006-2011 David Bateman
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} sind (@var{x})
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21 ## Compute the sine for each element of @var{x} in degrees. Returns zero
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22 ## for elements where @code{@var{x}/180} is an integer.
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23 ## @seealso{asind, sin}
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24 ## @end deftypefn
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25
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26 ## Author: David Bateman <dbateman@free.fr>
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27
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28 function y = sind (x)
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29 if (nargin != 1)
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30 print_usage ();
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31 endif
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32 I = x / 180;
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33 y = sin (I .* pi);
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34 y(I == round (I) & finite (I)) = 0;
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35 endfunction
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36
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37 %!error(sind())
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38 %!error(sind(1,2))
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39 %!assert(sind(10:10:90),sin(pi*[10:10:90]/180),-10*eps)
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40 %!assert(sind([0,180,360]) == 0)
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41 %!assert(sind([90,270]) != 0)