Defined in header <valarray> | ||
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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) |
Computes the inverse tangent of y/x using the signs of arguments to correctly determine quadrant.
y and x.The behavior is undefined if x.size() != y.size().
vx and each value in the numeric array y.vy and each value in the numeric array x.| x, y | - | numeric arrays to compute inverse tangent of |
| vy, vx | - | values to compute inverse tangent of |
A numeric array containing the results of computation of inverse tangent.
Unqualified function (atan2) is used to perform the computation. If such function is not available, std::atan2 is used due to argument dependent lookup.
The function can be implemented with the return type different from std::valarray. In this case, the replacement type has the following properties:
const member functions of std::valarray are provided. std::valarray, std::slice_array, std::gslice_array, std::mask_array and std::indirect_array can be constructed from the replacement type. const std::valarray& except begin() and end() (since C++14) should also accept the replacement type. const std::valarray& should accept every combination of const std::valarray& and the replacement type. applies the function std::asin to each element of valarray (function template) |
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applies the function std::acos to each element of valarray (function template) |
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applies the function std::atan to each element of valarray (function template) |
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| arc tangent, using signs to determine quadrants (function) |
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| returns the phase angle (function template) |
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