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multi_student_t_rng.hpp
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#ifndef STAN_MATH_PRIM_MAT_PROB_MULTI_STUDENT_T_RNG_HPP
#define STAN_MATH_PRIM_MAT_PROB_MULTI_STUDENT_T_RNG_HPP
#include <boost/math/special_functions/gamma.hpp>
#include <boost/math/special_functions/fpclassify.hpp>
#include <boost/random/variate_generator.hpp>
#include <stan/math/prim/mat/err/check_ldlt_factor.hpp>
#include <stan/math/prim/scal/err/check_size_match.hpp>
#include <stan/math/prim/mat/err/check_symmetric.hpp>
#include <stan/math/prim/scal/err/check_finite.hpp>
#include <stan/math/prim/scal/err/check_not_nan.hpp>
#include <stan/math/prim/scal/err/check_positive.hpp>
#include <stan/math/prim/mat/fun/multiply.hpp>
#include <stan/math/prim/mat/fun/dot_product.hpp>
#include <stan/math/prim/mat/fun/subtract.hpp>
#include <stan/math/prim/scal/fun/log1p.hpp>
#include <stan/math/prim/scal/fun/constants.hpp>
#include <stan/math/prim/mat/prob/multi_normal_rng.hpp>
#include <stan/math/prim/scal/prob/inv_gamma_rng.hpp>
#include <stan/math/prim/scal/meta/include_summand.hpp>
#include <cstdlib>
namespace stan {
namespace math {
using Eigen::Dynamic;
template <class RNG>
inline Eigen::VectorXd
multi_student_t_rng(const double nu,
const Eigen::Matrix<double, Dynamic, 1>& mu,
const Eigen::Matrix<double, Dynamic, Dynamic>& s,
RNG& rng) {
static const char* function("stan::math::multi_student_t_rng");
using stan::math::check_finite;
using stan::math::check_not_nan;
using stan::math::check_symmetric;
using stan::math::check_positive;
check_finite(function, "Location parameter", mu);
check_symmetric(function, "Scale parameter", s);
check_not_nan(function, "Degrees of freedom parameter", nu);
check_positive(function, "Degrees of freedom parameter", nu);
Eigen::VectorXd z(s.cols());
z.setZero();
double w = stan::math::inv_gamma_rng(nu / 2, nu / 2, rng);
return mu + std::sqrt(w) * stan::math::multi_normal_rng(z, s, rng);
}
}
}
#endif
check_not_nan.hpp
multiply.hpp
stan::math::sqrt
fvar< T > sqrt(const fvar< T > &x)
Definition: sqrt.hpp:15
stan::math::check_not_nan
bool check_not_nan(const char *function, const char *name, const T_y &y)
Return true if y is not NaN.
Definition: check_not_nan.hpp:63
check_size_match.hpp
check_positive.hpp
inv_gamma_rng.hpp
stan::math::check_symmetric
bool check_symmetric(const char *function, const char *name, const Eigen::Matrix< T_y, Dynamic, Dynamic > &y)
Return true if the specified matrix is symmetric.
Definition: check_symmetric.hpp:38
check_symmetric.hpp
include_summand.hpp
check_ldlt_factor.hpp
stan::math::inv_gamma_rng
double inv_gamma_rng(const double alpha, const double beta, RNG &rng)
Definition: inv_gamma_rng.hpp:33
multi_normal_rng.hpp
stan::math::check_positive
bool check_positive(const char *function, const char *name, const T_y &y)
Return true if y is positive.
Definition: check_positive.hpp:68
dot_product.hpp
stan::math::multi_student_t_rng
Eigen::VectorXd multi_student_t_rng(const double nu, const Eigen::Matrix< double, Dynamic, 1 > &mu, const Eigen::Matrix< double, Dynamic, Dynamic > &s, RNG &rng)
Definition: multi_student_t_rng.hpp:30
stan::math::check_finite
bool check_finite(const char *function, const char *name, const T_y &y)
Return true if y is finite.
Definition: check_finite.hpp:62
constants.hpp
check_finite.hpp
log1p.hpp
subtract.hpp
stan::math::multi_normal_rng
Eigen::VectorXd multi_normal_rng(const Eigen::Matrix< double, Dynamic, 1 > &mu, const Eigen::Matrix< double, Dynamic, Dynamic > &S, RNG &rng)
Definition: multi_normal_rng.hpp:25

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