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java.lang.Objectorg.apache.mahout.math.jet.stat.Gamma
public final class Gamma
Partially deprecated until unit tests are in place. Until this time, this class/interface is unsupported.
| Method Summary | |
|---|---|
static double |
beta(double alpha,
double beta)
Returns the beta function of the arguments. |
static double |
gamma(double x)
Returns the Gamma function of the argument. |
static double |
incompleteBeta(double alpha,
double beta,
double xx)
Returns the regularized Incomplete Beta Function evaluated from zero to xx; formerly named ibeta. |
static double |
incompleteGamma(double alpha,
double x)
Returns the Incomplete Gamma function; formerly named igamma. |
static double |
incompleteGammaComplement(double alpha,
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 |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Method Detail |
|---|
public static double beta(double alpha,
double beta)
- -
| (a) | (b)
beta( a, b ) = -----------.
-
| (a+b)
alpha - beta -
public static double gamma(double x)
public static double incompleteBeta(double alpha,
double beta,
double xx)
alpha - the alpha parameter of the beta distribution.beta - the beta parameter of the beta distribution.xx - the integration end point.
public static double incompleteGamma(double alpha,
double x)
alpha - the shape parameter of the gamma distribution.x - the integration end point.
public static double incompleteGammaComplement(double alpha,
double x)
alpha - the shape parameter of the gamma distribution.x - the integration start point.public static double logGamma(double x)
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