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scaled_inv_chi_square_rng.hpp
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#ifndef STAN_MATH_PRIM_SCAL_PROB_SCALED_INV_CHI_SQUARE_RNG_HPP
#define STAN_MATH_PRIM_SCAL_PROB_SCALED_INV_CHI_SQUARE_RNG_HPP
#include <boost/random/chi_squared_distribution.hpp>
#include <boost/random/variate_generator.hpp>
#include <stan/math/prim/scal/meta/OperandsAndPartials.hpp>
#include <stan/math/prim/scal/err/check_consistent_sizes.hpp>
#include <stan/math/prim/scal/err/check_nonnegative.hpp>
#include <stan/math/prim/scal/err/check_not_nan.hpp>
#include <stan/math/prim/scal/err/check_positive_finite.hpp>
#include <stan/math/prim/scal/fun/constants.hpp>
#include <stan/math/prim/scal/fun/value_of.hpp>
#include <stan/math/prim/scal/fun/gamma_q.hpp>
#include <stan/math/prim/scal/fun/digamma.hpp>
#include <stan/math/prim/scal/fun/lgamma.hpp>
#include <stan/math/prim/scal/fun/square.hpp>
#include <stan/math/prim/scal/meta/VectorView.hpp>
#include <stan/math/prim/scal/meta/VectorBuilder.hpp>
#include <stan/math/prim/scal/meta/length.hpp>
#include <stan/math/prim/scal/meta/include_summand.hpp>
#include <stan/math/prim/scal/fun/grad_reg_inc_gamma.hpp>
namespace stan {
namespace math {
template <class RNG>
inline double
scaled_inv_chi_square_rng(const double nu,
const double s,
RNG& rng) {
using boost::variate_generator;
using boost::random::chi_squared_distribution;
static const char* function("stan::math::scaled_inv_chi_square_rng");
using stan::math::check_positive_finite;
check_positive_finite(function, "Degrees of freedom parameter", nu);
check_positive_finite(function, "Scale parameter", s);
variate_generator<RNG&, chi_squared_distribution<> >
chi_square_rng(rng, chi_squared_distribution<>(nu));
return nu * s / chi_square_rng();
}
}
}
#endif
check_not_nan.hpp
stan::math::scaled_inv_chi_square_rng
double scaled_inv_chi_square_rng(const double nu, const double s, RNG &rng)
Definition: scaled_inv_chi_square_rng.hpp:29
lgamma.hpp
stan::math::chi_square_rng
double chi_square_rng(const double nu, RNG &rng)
Definition: chi_square_rng.hpp:25
check_positive_finite.hpp
digamma.hpp
square.hpp
gamma_q.hpp
VectorView.hpp
include_summand.hpp
check_nonnegative.hpp
OperandsAndPartials.hpp
VectorBuilder.hpp
length.hpp
grad_reg_inc_gamma.hpp
constants.hpp
value_of.hpp
check_consistent_sizes.hpp
stan::math::check_positive_finite
bool check_positive_finite(const char *function, const char *name, const T_y &y)
Return true if y is positive and finite.
Definition: check_positive_finite.hpp:28

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