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pareto_rng.hpp
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1 #ifndef STAN_MATH_PRIM_SCAL_PROB_PARETO_RNG_HPP
2 #define STAN_MATH_PRIM_SCAL_PROB_PARETO_RNG_HPP
3
4 #include <boost/random/exponential_distribution.hpp>
5 #include <boost/random/variate_generator.hpp>
6 #include <stan/math/prim/scal/meta/OperandsAndPartials.hpp>
7 #include <stan/math/prim/scal/err/check_consistent_sizes.hpp>
8 #include <stan/math/prim/scal/err/check_greater_or_equal.hpp>
9 #include <stan/math/prim/scal/err/check_nonnegative.hpp>
10 #include <stan/math/prim/scal/err/check_not_nan.hpp>
11 #include <stan/math/prim/scal/err/check_positive_finite.hpp>
12 #include <stan/math/prim/scal/fun/constants.hpp>
13 #include <stan/math/prim/scal/fun/multiply_log.hpp>
14 #include <stan/math/prim/scal/fun/value_of.hpp>
15
16
17 namespace stan {
18 namespace math {
19
20 template <class RNG>
21 inline double
22 pareto_rng(const double y_min,
23 const double alpha,
24 RNG& rng) {
25 using boost::variate_generator;
26 using boost::exponential_distribution;
27
28 static const char* function("stan::math::pareto_rng");
29
30 using stan::math::check_positive_finite;
31
32 check_positive_finite(function, "Scale parameter", y_min);
33 check_positive_finite(function, "Shape parameter", alpha);
34
35 variate_generator<RNG&, exponential_distribution<> >
36 exp_rng(rng, exponential_distribution<>(alpha));
37 return y_min * std::exp(exp_rng());
38 }
39 }
40 }
41 #endif
check_not_nan.hpp
check_positive_finite.hpp
stan::math::pareto_rng
double pareto_rng(const double y_min, const double alpha, RNG &rng)
Definition: pareto_rng.hpp:22
multiply_log.hpp
check_nonnegative.hpp
stan::math::exp
fvar< T > exp(const fvar< T > &x)
Definition: exp.hpp:10
OperandsAndPartials.hpp
constants.hpp
check_greater_or_equal.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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