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lkj_corr_cholesky_rng.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_PROB_LKJ_CORR_CHOLESKY_RNG_HPP
2 #define STAN_MATH_PRIM_MAT_PROB_LKJ_CORR_CHOLESKY_RNG_HPP
3
4 #include <stan/math/prim/scal/err/check_finite.hpp>
5 #include <stan/math/prim/scal/err/check_positive.hpp>
6 #include <stan/math/prim/scal/fun/constants.hpp>
7 #include <stan/math/prim/scal/prob/beta_rng.hpp>
8 #include <stan/math/prim/scal/meta/include_summand.hpp>
9 #include <stan/math/prim/mat/fun/factor_cov_matrix.hpp>
10 #include <stan/math/prim/mat/fun/factor_U.hpp>
11 #include <stan/math/prim/mat/fun/read_corr_L.hpp>
12 #include <stan/math/prim/mat/fun/read_corr_matrix.hpp>
13 #include <stan/math/prim/mat/fun/read_cov_L.hpp>
14 #include <stan/math/prim/mat/fun/read_cov_matrix.hpp>
15 #include <stan/math/prim/mat/fun/make_nu.hpp>
16 #include <stan/math/prim/scal/fun/identity_constrain.hpp>
17 #include <stan/math/prim/scal/fun/identity_free.hpp>
18 #include <stan/math/prim/scal/fun/positive_constrain.hpp>
19 #include <stan/math/prim/scal/fun/positive_free.hpp>
20 #include <stan/math/prim/scal/fun/lb_constrain.hpp>
21 #include <stan/math/prim/scal/fun/lb_free.hpp>
22 #include <stan/math/prim/scal/fun/ub_constrain.hpp>
23 #include <stan/math/prim/scal/fun/ub_free.hpp>
24 #include <stan/math/prim/scal/fun/lub_constrain.hpp>
25 #include <stan/math/prim/scal/fun/lub_free.hpp>
26 #include <stan/math/prim/scal/fun/prob_constrain.hpp>
27 #include <stan/math/prim/scal/fun/prob_free.hpp>
28 #include <stan/math/prim/scal/fun/corr_constrain.hpp>
29 #include <stan/math/prim/scal/fun/corr_free.hpp>
30 #include <stan/math/prim/mat/fun/simplex_constrain.hpp>
31 #include <stan/math/prim/mat/fun/simplex_free.hpp>
32 #include <stan/math/prim/mat/fun/ordered_constrain.hpp>
33 #include <stan/math/prim/mat/fun/ordered_free.hpp>
34 #include <stan/math/prim/mat/fun/positive_ordered_constrain.hpp>
35 #include <stan/math/prim/mat/fun/positive_ordered_free.hpp>
36 #include <stan/math/prim/mat/fun/cholesky_factor_constrain.hpp>
37 #include <stan/math/prim/mat/fun/cholesky_factor_free.hpp>
38 #include <stan/math/prim/mat/fun/cholesky_corr_constrain.hpp>
39 #include <stan/math/prim/mat/fun/cholesky_corr_free.hpp>
40 #include <stan/math/prim/mat/fun/corr_matrix_constrain.hpp>
41 #include <stan/math/prim/mat/fun/corr_matrix_free.hpp>
42 #include <stan/math/prim/mat/fun/cov_matrix_constrain.hpp>
43 #include <stan/math/prim/mat/fun/cov_matrix_free.hpp>
44 #include <stan/math/prim/mat/fun/cov_matrix_constrain_lkj.hpp>
45 #include <stan/math/prim/mat/fun/cov_matrix_free_lkj.hpp>
46
47 namespace stan {
48 namespace math {
49
50 template <class RNG>
51 inline Eigen::MatrixXd
52 lkj_corr_cholesky_rng(const size_t K,
53 const double eta,
54 RNG& rng) {
55 static const char* function("stan::math::lkj_corr_cholesky_rng");
56
57 using stan::math::check_positive;
58
59 check_positive(function, "Shape parameter", eta);
60
61 Eigen::ArrayXd CPCs((K * (K - 1)) / 2);
62 double alpha = eta + 0.5 * (K - 1);
63 unsigned int count = 0;
64 for (size_t i = 0; i < (K - 1); i++) {
65 alpha -= 0.5;
66 for (size_t j = i + 1; j < K; j++) {
67 CPCs(count) = 2.0 * stan::math::beta_rng(alpha, alpha, rng) - 1.0;
68 count++;
69 }
70 }
71 return stan::math::read_corr_L(CPCs, K);
72 }
73
74 }
75 }
76 #endif
ub_constrain.hpp
factor_U.hpp
stan::math::beta_rng
double beta_rng(const double alpha, const double beta, RNG &rng)
Definition: beta_rng.hpp:29
cov_matrix_free_lkj.hpp
positive_free.hpp
check_positive.hpp
stan
Definition: log_sum_exp.hpp:8
lb_free.hpp
cov_matrix_free.hpp
corr_matrix_constrain.hpp
cholesky_factor_free.hpp
include_summand.hpp
corr_constrain.hpp
prob_free.hpp
ordered_constrain.hpp
cov_matrix_constrain_lkj.hpp
beta_rng.hpp
read_cov_L.hpp
simplex_free.hpp
cholesky_corr_constrain.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
identity_free.hpp
simplex_constrain.hpp
prob_constrain.hpp
cholesky_factor_constrain.hpp
stan::math::read_corr_L
Eigen::Matrix< T, Eigen::Dynamic, Eigen::Dynamic > read_corr_L(const Eigen::Array< T, Eigen::Dynamic, 1 > &CPCs, const size_t K)
Return the Cholesky factor of the correlation matrix of the specified dimensionality corresponding to...
Definition: read_corr_L.hpp:41
stan::math::lkj_corr_cholesky_rng
Eigen::MatrixXd lkj_corr_cholesky_rng(const size_t K, const double eta, RNG &rng)
Definition: lkj_corr_cholesky_rng.hpp:52
factor_cov_matrix.hpp
ub_free.hpp
cholesky_corr_free.hpp
constants.hpp
check_finite.hpp
cov_matrix_constrain.hpp
identity_constrain.hpp
positive_ordered_constrain.hpp
positive_constrain.hpp
lub_constrain.hpp
read_cov_matrix.hpp
read_corr_matrix.hpp
read_corr_L.hpp
lub_free.hpp
positive_ordered_free.hpp
corr_matrix_free.hpp
make_nu.hpp
lb_constrain.hpp
ordered_free.hpp
corr_free.hpp

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