LogGamma (Apache Commons Numbers Gamma 1.0 API)

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

```
public final class LogGamma
extends Object
```
Function \( \ln \Gamma(x) \). Class is immutable.

- Method Summary
  
  All Methods Static Methods Concrete Methods
  Modifier and Type Method Description
  
  static double value(double x)
  Computes the function \( \ln \Gamma(x) \) for x >= 0.
  - 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 x)
```
    Computes the function \( \ln \Gamma(x) \) for x >= 0. For x <= 8, the implementation is based on the double precision implementation in the NSWC Library of Mathematics Subroutines, DGAMLN. For x >= 8, the implementation is based on
    
    Gamma Function, equation (28).
    
    Lanczos Approximation, equations (1) through (5).
    
    Paul Godfrey, A note on the computation of the convergent Lanczos complex Gamma approximation
    Parameters:
    
    x - Argument.
    
    Returns:
    
    \( \ln \Gamma(x) \), or NaN if x <= 0.