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25
26## -*- texinfo -*-
27## @deftypefn {} {} sind (@var{x})
28## Compute the sine for each element of @var{x} in degrees.
29##
30## Returns zero for elements where @code{@var{x}/180} is an integer.
31## @seealso{asind, sin}
32## @end deftypefn
33
34function y = sind (x)
35
36  if (nargin != 1)
37    print_usage ();
38  endif
39
40  I = x / 180;
41  y = sin (I .* pi);
42  y(I == fix (I) & isfinite (I)) = 0;
43
44endfunction
45
46
47%!assert (sind (10:10:90), sin (pi*[10:10:90]/180), -10*eps)
48%!assert (sind ([0, 180, 360]) == 0)
49%!assert (sind ([90, 270]) != 0)
50
51%!error sind ()
52%!error sind (1, 2)
53