Namespaces
Variants
Views
Actions

std::atan2(std::valarray)

From cppreference.com
< cpp‎ | numeric‎ | valarray
Revision as of 14:27, 2 November 2012 by P12bot (Talk | contribs)

 
 
 
 

Template:ddcl list begin <tr class="t-dsc-header">

<td>
Defined in header <valarray>
</td>

<td></td> <td></td> <tr class="t-dcl ">

<td >
template< class T >
valarray<T> atan2( const valarray<T>& y, const valarray<T>& x );
</td>

<td > (1) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl ">

<td >
template< class T >
valarray<T> atan2( const valarray<T>& y, const T& vx );
</td>

<td > (2) </td> <td class="t-dcl-nopad"> </td> </tr> <tr class="t-dcl ">

<td >
template< class T >
valarray<T> atan2( const T& vy, const valarray<T>& x );
</td>

<td > (3) </td> <td class="t-dcl-nopad"> </td> </tr> Template:ddcl list end

Computes the inverse tangent of y/x using the signs of arguments to correctly determine quadrant.

1) Computes the inverse tangent of each pair of corresponding values from y and x.

The behavior is undefined if x.size() != y.size().

2) Computes the inverse tangent of vx and each value in the numeric array y.
3) Computes the inverse tangent of vy and each value in the numeric array x.

Contents

Parameters

x, y - numeric arrays to compute inverse tangent of
vy, vx - values to compute inverse tangent of

Return value

A numeric array containing the results of computation of inverse tangent.

Notes

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:

Example

See also

Template:cpp/numeric/math/dcl list atan2