public class LogBeta extends BivariateRealFunction
log(B(x, y)).
Γ(x)Γ(y)
log(B(x, y)) = log ( ----------- ) = logΓ(x) + logΓ(y) - logΓ(x + y)
Γ(x+y)
x > 0, y > 0
The R equivalent function is lbeta.
Function.EvaluationException| Constructor and Description |
|---|
LogBeta() |
| Modifier and Type | Method and Description |
|---|---|
double |
evaluate(double x,
double y)
Compute
log(B(x,y)). |
dimensionOfDomain, dimensionOfRange, evaluatepublic double evaluate(double x,
double y)
log(B(x,y)).evaluate in class BivariateRealFunctionx - x >= 0y - y >= 0log(B(x,y))