3.5.2.4.3.1 Gammaln

Natural Log of the Gamma Function

The natural log of the Gamma function has the following form:

gammaln(x)

This function returns the natural log of the gamma function \Gamma(x), where \Gamma(x) is given by:

\Gamma(x) = \int_{0}^{+\infty}t^{x-1}e^{-t}dt