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corr_matrix_constrain.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_FUN_CORR_MATRIX_CONSTRAIN_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_CORR_MATRIX_CONSTRAIN_HPP
3
4 #include <stan/math/prim/mat/fun/Eigen.hpp>
5 #include <stan/math/prim/mat/meta/index_type.hpp>
6 #include <stan/math/prim/scal/fun/corr_constrain.hpp>
7 #include <stan/math/prim/mat/fun/read_corr_matrix.hpp>
8 #include <stdexcept>
9
10 namespace stan {
11
12 namespace math {
13
38 template <typename T>
39 Eigen::Matrix<T, Eigen::Dynamic, Eigen::Dynamic>
40 corr_matrix_constrain(const Eigen::Matrix<T, Eigen::Dynamic, 1>& x,
41 typename math::index_type
42 <Eigen::Matrix<T, Eigen::Dynamic, 1> >::type k) {
43 using Eigen::Dynamic;
44 using Eigen::Matrix;
45 using stan::math::index_type;
46 typedef typename index_type<Matrix<T, Dynamic, 1> >::type size_type;
47
48 size_type k_choose_2 = (k * (k - 1)) / 2;
49 if (k_choose_2 != x.size())
50 throw std::invalid_argument("x is not a valid correlation matrix");
51 Eigen::Array<T, Eigen::Dynamic, 1> cpcs(k_choose_2);
52 for (size_type i = 0; i < k_choose_2; ++i)
53 cpcs[i] = corr_constrain(x[i]);
54 return read_corr_matrix(cpcs, k);
55 }
56
76 template <typename T>
77 Eigen::Matrix<T, Eigen::Dynamic, Eigen::Dynamic>
78 corr_matrix_constrain(const Eigen::Matrix<T, Eigen::Dynamic, 1>& x,
79 typename math::index_type
80 <Eigen::Matrix<T, Eigen::Dynamic, 1> >::type k,
81 T& lp) {
82 using Eigen::Array;
83 using Eigen::Dynamic;
84 using Eigen::Matrix;
85 using stan::math::index_type;
86 typedef typename index_type<Matrix<T, Dynamic, 1> >::type size_type;
87
88 size_type k_choose_2 = (k * (k - 1)) / 2;
89 if (k_choose_2 != x.size())
90 throw std::invalid_argument("x is not a valid correlation matrix");
91 Array<T, Dynamic, 1> cpcs(k_choose_2);
92 for (size_type i = 0; i < k_choose_2; ++i)
93 cpcs[i] = corr_constrain(x[i], lp);
94 return read_corr_matrix(cpcs, k, lp);
95 }
96
97 }
98
99 }
100
101 #endif
stan::math::corr_matrix_constrain
Eigen::Matrix< T, Eigen::Dynamic, Eigen::Dynamic > corr_matrix_constrain(const Eigen::Matrix< T, Eigen::Dynamic, 1 > &x, typename math::index_type< Eigen::Matrix< T, Eigen::Dynamic, 1 > >::type k)
Return the correlation matrix of the specified dimensionality derived from the specified vector of un...
Definition: corr_matrix_constrain.hpp:40
stan::math::read_corr_matrix
Eigen::Matrix< T, Eigen::Dynamic, Eigen::Dynamic > read_corr_matrix(const Eigen::Array< T, Eigen::Dynamic, 1 > &CPCs, const size_t K)
Return the correlation matrix of the specified dimensionality corresponding to the specified canonica...
Definition: read_corr_matrix.hpp:28
stan::math::size_type
Eigen::Matrix< double, Eigen::Dynamic, Eigen::Dynamic >::Index size_type
Type for sizes and indexes in an Eigen matrix with double e.
Definition: typedefs.hpp:13
stan::math::index_type
Primary template class for the metaprogram to compute the index type of a container.
Definition: index_type.hpp:19
corr_constrain.hpp
index_type.hpp
stan::math::invalid_argument
void invalid_argument(const char *function, const char *name, const T &y, const char *msg1, const char *msg2)
Throw an invalid_argument exception with a consistently formatted message.
Definition: invalid_argument.hpp:31
Eigen.hpp
read_corr_matrix.hpp
stan::math::corr_constrain
T corr_constrain(const T x)
Return the result of transforming the specified scalar to have a valid correlation value between -1 a...
Definition: corr_constrain.hpp:25

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