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java.lang.Objectorg.apache.commons.math3.special.Beta
public class Beta
This is a utility class that provides computation methods related to the Beta family of functions.
Implementation of logBeta(double, double) is based on the
algorithms described in
| Method Summary | |
|---|---|
static double |
logBeta(double p,
double q)
Returns the value of log B(p, q) for 0 ≤ x ≤ 1 and p, q > 0. |
static double |
logBeta(double a,
double b,
double epsilon,
int maxIterations)
Deprecated. as of version 3.1, this method is deprecated as the computation of the beta function is no longer iterative; it will be removed in version 4.0. Current implementation of this method internally calls logBeta(double, double). |
static double |
regularizedBeta(double x,
double a,
double b)
Returns the regularized beta function I(x, a, b). |
static double |
regularizedBeta(double x,
double a,
double b,
double epsilon)
Returns the regularized beta function I(x, a, b). |
static double |
regularizedBeta(double x,
double a,
double b,
double epsilon,
int maxIterations)
Returns the regularized beta function I(x, a, b). |
static double |
regularizedBeta(double x,
double a,
double b,
int maxIterations)
Returns the regularized beta function I(x, a, b). |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Method Detail |
|---|
public static double regularizedBeta(double x,
double a,
double b)
x - Value.a - Parameter a.b - Parameter b.
MaxCountExceededException - if the algorithm fails to converge.
public static double regularizedBeta(double x,
double a,
double b,
double epsilon)
x - Value.a - Parameter a.b - Parameter b.epsilon - When the absolute value of the nth item in the
series is less than epsilon the approximation ceases to calculate
further elements in the series.
MaxCountExceededException - if the algorithm fails to converge.
public static double regularizedBeta(double x,
double a,
double b,
int maxIterations)
x - the value.a - Parameter a.b - Parameter b.maxIterations - Maximum number of "iterations" to complete.
MaxCountExceededException - if the algorithm fails to converge.
public static double regularizedBeta(double x,
double a,
double b,
double epsilon,
int maxIterations)
x - the value.a - Parameter a.b - Parameter b.epsilon - When the absolute value of the nth item in the
series is less than epsilon the approximation ceases to calculate
further elements in the series.maxIterations - Maximum number of "iterations" to complete.
MaxCountExceededException - if the algorithm fails to converge.
@Deprecated
public static double logBeta(double a,
double b,
double epsilon,
int maxIterations)
logBeta(double, double).
a - Parameter a.b - Parameter b.epsilon - This parameter is ignored.maxIterations - This parameter is ignored.
public static double logBeta(double p,
double q)
DBETLN.
p - First argument.q - Second argument.
log(Beta(p, q)), NaN if
p <= 0 or q <= 0.
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