exp


function template
<valarray> 
template<class T> valarray<T> exp (const valarray<T>& x);

Compute exponential of valarray elements

Returns a valarray object containing the exponential function values of all the elements of x.

This function overloads cmath's exp function.

Parameters

x
valarray containing elements of a type for which the unary function exp is defined.


Return value

A valarray object with the exponential function values of the elements of x.

Example

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// exp valarray example
#include <iostream>
#include <cmath>
#include <valarray>
using namespace std;

int main ()
{
  double val[] = {1.1, 2.2, 4.4, 8.8};
  valarray<double> foo (val,4);

  valarray<double> bar = exp (foo);

  cout << "foo: ";
  for (size_t i=0; i<foo.size(); ++i)
	  cout << foo[i] << ' ';
  cout << endl;

  cout << "bar: ";
  for (size_t i=0; i<bar.size(); ++i)
	  cout << bar[i] << ' ';
  cout << endl;

  return 0;
}


Output:

foo: 1.1 2.2 4.4 8.8
bar: 3.00417 9.02501 81.4509 6634.24


See also

exp (cmath) Compute exponential function (function)
log Compute natural logarithm of valarray elements (function template)
pow Compute power of valarray elements (function template)