LOGBETA Function

Returns the logarithm of the beta function.

Category:

Mathematical

Syntax

LOGBETA(a,b)

is the first shape parameter, where a>0.

is the second shape parameter, where b>0.

The LOGBETA function is mathematically given by the equation

\begin{matrix} l o g (β (a, b)) = l o g (Γ (a)) + l o g (Γ (b)) - l o g (Γ (a + b)) \end{matrix}

where

Γ (.)

is the gamma function.

If the expression cannot be computed, LOGBETA returns a missing value.

The following SAS statement produces this result.

SAS Statement	Result
LOGBETA(5,3);	-4.653960350