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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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