log_q_gamma_cf()

template<typename T_a , typename T_z >

return_type_t< T_a, T_z > stan::math::internal::log_q_gamma_cf ( const T_a &  a, const T_z &  z, double  precision = LOG_Q_GAMMA_CF_PRECISION, int  max_steps = 250  )

inline

Compute log(Q(a,z)) using continued fraction expansion for upper incomplete gamma function.

Template Parameters

T_a	Type of shape parameter a (double or fvar types)
T_z	Type of value parameter z (double or fvar types)

Parameters

a	Shape parameter
z	Value at which to evaluate
precision	Convergence threshold, default of sqrt(machine_epsilon)
max_steps	Maximum number of continued fraction iterations

Returns

log(Q(a,z)) with the return type of T_a and T_z

Definition at line 41 of file log_gamma_q_dgamma.hpp.