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std::atan2<div class="t-tr-text">(STD :: valarray)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">:</div><div class="t-tr-dropdown-orig">(std::valarray)</div><div class="t-tr-dropdown-notes"> [http://translate.google.com Google].<br/> . [http://en.cppreference.com/w/Cppreference:MachineTranslations ].</div></div></div></div></div> cppreference.com
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std::atan2<div class="t-tr-text">(STD :: valarray)<div class="t-tr-dropdown"><div><div><div class="t-tr-dropdown-arrow-border"></div><div class="t-tr-dropdown-arrow"></div><div class="t-tr-dropdown-h">:</div><div class="t-tr-dropdown-orig">(std::valarray)</div><div class="t-tr-dropdown-notes"> [http://translate.google.com Google].<br/> . [http://en.cppreference.com/w/Cppreference:MachineTranslations ].</div></div></div></div></div>

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template< class T > valarray<T> atan2( const valarray<T>& y, const valarray<T>& x );
 (1)
template< class T > valarray<T> atan2( const valarray<T>& y, const T& vx );
 (2)
template< class T > valarray<T> atan2( const T& vy, const valarray<T>& x );
 (3)
y/x , .
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Computes the inverse tangent of y/x using the signs of arguments to correctly determine quadrant.
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y x.
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Computes the inverse tangent of each pair of corresponding values from y and x.
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, x.size() != y.size().
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The behavior is undefined if x.size() != y.size().
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2)
vx y .
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Computes the inverse tangent of vx and each value in the numeric array y.
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3)
vy x .
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Computes the inverse tangent of vy and each value in the numeric array x.
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x, y
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numeric arrays to compute inverse tangent of
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vy, vx
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values to compute inverse tangent of
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, .
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A numeric array containing the results of computation of inverse tangent.
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(atan2) . , std::atan2 .
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Unqualified function (atan2) is used to perform the computation. If such function is not available, std::atan2 is used due to argument dependent lookup.
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std::valarray. , :
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The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:
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  • const - std::valarray .
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    All const member functions of std::valarray are provided.
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  • std::valarray, std::slice_array, std::gslice_array, std::mask_array std::indirect_array .
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    std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type.
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  • , const std::valarray& .
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    All functions accepting a arguments of type const std::valarray& should also accept the replacement type.
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  • const std::valarray& const std::valarray& .
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    All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type.
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