◆ wiener4_cdf_grad_a()

template<typename T_y , typename T_a , typename T_v , typename T_w , typename T_cdf , typename T_err >

auto stan::math::internal::wiener4_cdf_grad_a	(	const T_y &	y,
		const T_a &	a,
		const T_v &	v,
		const T_w &	w,
		T_cdf &&	cdf,
		T_err	log_err = `log(1e-12)`
	)

inline

Calculate derivative of the wiener4 distribution w.r.t.

'a' (natural-scale)

Parameters

y	The reaction time in seconds
a	The boundary separation
v	The relative starting point
w	The drift rate
cdf	The value of the distribution
log_err	The log error tolerance in the computation of the number of terms for the infinite sums