Stan Math Library  2.8.0
reverse mode automatic differentiation
 All Classes Namespaces Files Functions Variables Typedefs Enumerator Friends Macros Groups
chi_square_rng.hpp
Go to the documentation of this file.
1 #ifndef STAN_MATH_PRIM_SCAL_PROB_CHI_SQUARE_RNG_HPP
2 #define STAN_MATH_PRIM_SCAL_PROB_CHI_SQUARE_RNG_HPP
3 
4 #include <boost/random/chi_squared_distribution.hpp>
5 #include <boost/random/variate_generator.hpp>
18 
19 namespace stan {
20 
21  namespace math {
22 
23  template <class RNG>
24  inline double
25  chi_square_rng(const double nu,
26  RNG& rng) {
27  using boost::variate_generator;
28  using boost::random::chi_squared_distribution;
29 
30  static const char* function("stan::math::chi_square_rng");
31 
33 
34  check_positive_finite(function, "Degrees of freedom parameter", nu);
35 
36  variate_generator<RNG&, chi_squared_distribution<> >
37  chi_square_rng(rng, chi_squared_distribution<>(nu));
38  return chi_square_rng();
39  }
40  }
41 }
42 #endif
double chi_square_rng(const double nu, RNG &rng)
bool check_positive_finite(const char *function, const char *name, const T_y &y)
Return true if y is positive and finite.

     [ Stan Home Page ] © 2011–2015, Stan Development Team.