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java.lang.Objectcern.jet.math.Constants
cern.jet.stat.Gamma
Gamma and Beta functions.
Implementation:
| Method Summary | |
| static double | beta(double a,
     double b)Returns the beta function of the arguments. | 
| static double | gamma(double x)Returns the Gamma function of the argument. | 
| static double | incompleteBeta(double aa,
               double bb,
               double xx)Returns the Incomplete Beta Function evaluated from zero to xx; formerly named ibeta. | 
| static double | incompleteGamma(double a,
                double x)Returns the Incomplete Gamma function; formerly named igamma. | 
| static double | incompleteGammaComplement(double a,
                          double x)Returns the Complemented Incomplete Gamma function; formerly named igamc. | 
| static double | logGamma(double x)Returns the natural logarithm of the gamma function; formerly named lgamma. | 
| Methods inherited from class java.lang.Object | 
| equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
| Method Detail | 
public static double beta(double a,
                          double b)
                   throws ArithmeticException
                   -     -
                  | (a) | (b)
 beta( a, b )  =  -----------.
                     -
                    | (a+b)
 
ArithmeticException
public static double gamma(double x)
                    throws ArithmeticException
ArithmeticException
public static double incompleteBeta(double aa,
                                    double bb,
                                    double xx)
                             throws ArithmeticException
aa - the alpha parameter of the beta distribution.bb - the beta parameter of the beta distribution.xx - the integration end point.
ArithmeticException
public static double incompleteGamma(double a,
                                     double x)
                              throws ArithmeticException
a - the parameter of the gamma distribution.x - the integration end point.
ArithmeticException
public static double incompleteGammaComplement(double a,
                                               double x)
                                        throws ArithmeticException
a - the parameter of the gamma distribution.x - the integration start point.
ArithmeticException
public static double logGamma(double x)
                       throws ArithmeticException
ArithmeticException| 
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