log10


function template
<valarray> 
template<class T> valarray<T> log10 (const valarray<T>& x);

Compute common logarithm of valarray elements

Returns a valarray object containing the common logarithm (base-10 logarithm) of all the elements of x.

This function overloads cmath's log10 function.

Parameters

x
valarray containing elements of a type for which the unary function log10 is defined.


Return value

A valarray object with the common logarithms of the elements of x.

Example

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// log10 valarray example
#include <iostream>
#include <cmath>
#include <valarray>
using namespace std;

int main ()
{
  double val[] = {1.0, 10.0, 100.0, 200.0};
  valarray<double> foo (val,4);

  valarray<double> bar = log10 (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 10 100 200
bar: 0 1 2 2.30103


See also

log10 (cmath) Compute common logarithm (function)
log Compute natural logarithm of valarray elements (function template)
exp Compute exponential of valarray elements (function template)
pow Compute power of valarray elements (function template)