Stan Math Library  2.10.0
reverse mode automatic differentiation
poisson_rng.hpp
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1 #ifndef STAN_MATH_PRIM_SCAL_PROB_POISSON_RNG_HPP
2 #define STAN_MATH_PRIM_SCAL_PROB_POISSON_RNG_HPP
3 
12 #include <boost/math/special_functions/fpclassify.hpp>
13 #include <boost/random/poisson_distribution.hpp>
14 #include <boost/random/variate_generator.hpp>
15 #include <cmath>
16 #include <limits>
17 
18 namespace stan {
19 
20  namespace math {
21 
22  template <class RNG>
23  inline int
24  poisson_rng(const double lambda,
25  RNG& rng) {
26  using boost::variate_generator;
27  using boost::random::poisson_distribution;
28 
29  static const char* function("stan::math::poisson_rng");
30 
31  check_not_nan(function, "Rate parameter", lambda);
32  check_nonnegative(function, "Rate parameter", lambda);
33  check_less(function, "Rate parameter", lambda, POISSON_MAX_RATE);
34 
35  variate_generator<RNG&, poisson_distribution<> >
36  poisson_rng(rng, poisson_distribution<>(lambda));
37  return poisson_rng();
38  }
39  }
40 }
41 #endif
bool check_less(const char *function, const char *name, const T_y &y, const T_high &high)
Return true if y is strictly less than high.
Definition: check_less.hpp:81
bool check_not_nan(const char *function, const char *name, const T_y &y)
Return true if y is not NaN.
const double POISSON_MAX_RATE
Largest rate parameter allowed in Poisson RNG.
Definition: constants.hpp:72
int poisson_rng(const double lambda, RNG &rng)
Definition: poisson_rng.hpp:24
bool check_nonnegative(const char *function, const char *name, const T_y &y)
Return true if y is non-negative.

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