Gamma

java.lang.Object
- jhplot.math.num.special.Gamma

```
public final class Gamma
extends java.lang.Object
```
Utility class that provides methods related to the gamma family of functions.

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static double`	`logGamma(double x)` Returns the natural logarithm of the gamma function Γ(x) (1).
`static double`	`regularizedGammaP(double a, double x)` Returns the regularized gamma function P(a, x) (1).
`static double`	`regularizedGammaQ(double a, double x)` Returns the regularized gamma function Q(a, x) = 1 - P(a, x) (1).

Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - logGamma
```
public static double logGamma(double x)
```
    Returns the natural logarithm of the gamma function Γ(x) (1).
    
    References:
    1. Eric W. Weisstein. "Gamma Function." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/GammaFunction.html
    Parameters:
    
    x - the point of evaluation.
    
    Returns:
    
    log(Γ(x))
  - regularizedGammaP
```
public static double regularizedGammaP(double a,
                                       double x)
                                throws NumericException
```
    Returns the regularized gamma function P(a, x) (1).
    
    References:
    1. Eric W. Weisstein. "Regularized Gamma Function." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/RegularizedGammaFunction.html
    Parameters:
    
    x - the evaluation point.
    
    a - the a parameter.
    
    Returns:
    
    P(a, x)
    
    Throws:
    
    NumericException - if the value could not be computed.
  - regularizedGammaQ
```
public static double regularizedGammaQ(double a,
                                       double x)
                                throws NumericException
```
    Returns the regularized gamma function Q(a, x) = 1 - P(a, x) (1).
    
    References:
    1. Eric W. Weisstein. "Regularized Gamma Function." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/RegularizedGammaFunction.html
    Parameters:
    
    x - the evaluation point.
    
    a - the a parameter.
    
    Returns:
    
    Q(a, x)
    
    Throws:
    
    NumericException - if the value could not be computed.

Class Gamma

Method Summary

Methods inherited from class java.lang.Object

Method Detail

logGamma

regularizedGammaP

regularizedGammaQ