log_regularized_beta Function

public pure elemental function log_regularized_beta(a, b, x, max_iterations) result(rst)

Log regularized beta; invalid inputs or nonconvergence return NaN. The leading factor and complementary branch are evaluated in log space.

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=real64),	intent(in)			::	a	Finite, positive beta shape parameters.
real(kind=real64),	intent(in)			::	b	Finite, positive beta shape parameters.
real(kind=real64),	intent(in)			::	x	Integration limit on [0, 1].
integer(kind=int32),	intent(in),	optional		::	max_iterations	Continued-fraction iteration limit; default 1000.

Return Value real(kind=real64)

Log ratio; x = 0 gives -infinity, x = 1 gives zero.