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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 | |
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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 |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Method Detail |
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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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