grad_reg_inc_beta()

template<typename T >

void stan::math::grad_reg_inc_beta	(	T &	g1,
		T &	g2,
		const T &	a,
		const T &	b,
		const T &	z,
		const T &	digammaA,
		const T &	digammaB,
		const T &	digammaSum,
		const T &	betaAB
	)

Computes the gradients of the regularized incomplete beta function.

Specifically, this function computes gradients of ibeta(a, b, z), with respect to the arguments a and b.

Uses the equivalence to a hypergeometric function. See http://dlmf.nist.gov/8.17#ii

Template Parameters

T	type of arguments

Parameters

[out]	g1	partial derivative of ibeta(a, b, z) with respect to a
[out]	g2	partial derivative of ibeta(a, b, z) with respect to b
[in]	a	a
[in]	b	b
[in]	z	z
[in]	digammaA	the value of digamma(a)
[in]	digammaB	the value of digamma(b)
[in]	digammaSum	the value of digamma(a + b)
[in]	betaAB	the value of beta(a, b)

Definition at line 35 of file grad_reg_inc_beta.hpp.