1 #ifndef STAN_MATH_PRIM_SCAL_PROB_NEG_BINOMIAL_RNG_HPP 2 #define STAN_MATH_PRIM_SCAL_PROB_NEG_BINOMIAL_RNG_HPP 4 #include <boost/math/special_functions/digamma.hpp> 5 #include <boost/random/negative_binomial_distribution.hpp> 6 #include <boost/random/variate_generator.hpp> 31 using boost::variate_generator;
32 using boost::random::negative_binomial_distribution;
33 using boost::random::poisson_distribution;
34 using boost::gamma_distribution;
36 static const char*
function(
"neg_binomial_rng");
42 double rng_from_gamma =
43 variate_generator<RNG&, gamma_distribution<> >
44 (rng, gamma_distribution<>(alpha, 1.0 / beta))();
48 "Random number that came from gamma distribution",
51 "Random number that came from gamma distribution",
54 "Random number that came from gamma distribution",
57 return variate_generator<RNG&, poisson_distribution<> >
58 (rng, poisson_distribution<>(rng_from_gamma))();
int neg_binomial_rng(double alpha, double beta, RNG &rng)
void check_nonnegative(const char *function, const char *name, const T_y &y)
Check if y is non-negative.
void check_positive_finite(const char *function, const char *name, const T_y &y)
Check if y is positive and finite.
void check_not_nan(const char *function, const char *name, const T_y &y)
Check if y is not NaN.
const double POISSON_MAX_RATE
Largest rate parameter allowed in Poisson RNG.
void check_less(const char *function, const char *name, const T_y &y, const T_high &high)
Check if y is strictly less than high.