1 #ifndef STAN_MATH_PRIM_SCAL_PROB_INV_GAMMA_RNG_HPP
2 #define STAN_MATH_PRIM_SCAL_PROB_INV_GAMMA_RNG_HPP
21 #include <boost/random/gamma_distribution.hpp>
22 #include <boost/random/variate_generator.hpp>
33 using boost::variate_generator;
34 using boost::random::gamma_distribution;
36 static const char*
function(
"stan::math::inv_gamma_rng");
43 variate_generator<RNG&, gamma_distribution<> >
44 gamma_rng(rng, gamma_distribution<>(alpha, 1 / beta));
double gamma_rng(const double alpha, const double beta, RNG &rng)
double inv_gamma_rng(const double alpha, const double beta, RNG &rng)
bool check_positive_finite(const char *function, const char *name, const T_y &y)
Return true if y is positive and finite.