Namespaces
Variants
Views
Actions

std::pow(std::valarray)

From cppreference.com
< cpp‎ | numeric‎ | valarray
Revision as of 14:51, 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-sep"><td></td><td></td><td></td></tr>

<tr class="t-dcl ">

<td >
template< class T >
valarray<T> pow( const valarray<T>& base, const valarray<T>& exp );
</td>

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

<tr class="t-dcl ">

<td >
template< class T >
valarray<T> pow( const valarray<T>& base, const T& vexp );
</td>

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

<tr class="t-dcl ">

<td >
template< class T >
valarray<T> pow( const T& vbase, const valarray<T>& exp );
</td>

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

Raises a value to a power.

1) Computes the values of each element in the numeric array base raised to the power specified by the corresponding element from the numeric array exp.

The behavior is undefined if base.size() != exp.size().

2) Computes the values of each element in the numeric array base raised to the power vexp.
3) Computes the values of vbase raised to the power defined by the elements in the numeric array exp.

Contents

Parameters

base - numeric array containing the values of the base
exp - numeric array containing the values of the exponent
vbase - a value defining the base
vexp - a value defining the exponent

Return value

A numeric array containing the results of exponentiation.

Notes

Unqualified function (pow) is used to perform the computation. If such function is not available, std::pow 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:

  • All 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.
  • All functions accepting a arguments of type const std::valarray& should also accept the replacement type.
  • All functions accepting two arguments of type const std::valarray& should accept every combination of const std::valarray& and the replacement type.
  • The return type does not add more than two levels of template nesting over the most deeply-nested argument type.

Example

See also

Template:cpp/numeric/math/dcl list pow