Beta (Apache Commons Numbers Gamma 1.2 API)

java.lang.Object
- org.apache.commons.numbers.gamma.Beta

```
public final class Beta
extends Object
```
Beta function.
\[ B(a, b) = \frac{\Gamma(a)\ \Gamma(b)}{\Gamma(a+b)} = \frac{(a-1)!\ (b-1)!}{(a+b-1)!} \]
where \( \Gamma(z) \) is the gamma function.
This code has been adapted from the Boost c++ implementation <boost/math/special_functions/beta.hpp>.

Since:

1.1

See Also:

Boost C++ Beta function

- Method Summary
  
  All Methods Static Methods Concrete Methods
  Modifier and Type Method Description
  
  static double value(double a, double b)
  Computes the value of the beta function B(a, b).
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - value
```
public static double value(double a,
                           double b)
```
    Computes the value of the beta function B(a, b).
    \[ B(a, b) = \frac{\Gamma(a)\ \Gamma(b)}{\Gamma(a+b)} \]
    where \( \Gamma(z) \) is the gamma function.
    
    Parameters:
    
    a - Parameter a.
    
    b - Parameter b.
    
    Returns:
    
    the beta function \( B(a, b) \).