<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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
|
// 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
| 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) |
|