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elt_divide.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_FUN_ELT_DIVIDE_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_ELT_DIVIDE_HPP
3
4 #include <boost/math/tools/promotion.hpp>
5 #include <stan/math/prim/mat/fun/Eigen.hpp>
6 #include <stan/math/prim/mat/err/check_matching_dims.hpp>
7
8 namespace stan {
9 namespace math {
10
22 template <typename T1, typename T2, int R, int C>
23 Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type, R, C>
24 elt_divide(const Eigen::Matrix<T1, R, C>& m1,
25 const Eigen::Matrix<T2, R, C>& m2) {
26 stan::math::check_matching_dims("elt_divide",
27 "m1", m1,
28 "m2", m2);
29 Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type,
30 R, C> result(m1.rows(), m2.cols());
31 for (int i = 0; i < m1.size(); ++i)
32 result(i) = m1(i) / m2(i);
33 return result;
34 }
35
48 template <typename T1, typename T2, int R, int C>
49 Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type, R, C>
50 elt_divide(const Eigen::Matrix<T1, R, C>& m, T2 s) {
51 return m / s;
52 }
53
66 template <typename T1, typename T2, int R, int C>
67 Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type, R, C>
68 elt_divide(T1 s,
69 const Eigen::Matrix<T2, R, C>& m) {
70 Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type,
71 R, C> result(m.rows(), m.cols());
72 for (int i = 0; i < m.size(); ++i)
73 result(i) = s / m(i);
74 return result;
75 }
76
77 }
78 }
79 #endif
check_matching_dims.hpp
stan::math::check_matching_dims
bool check_matching_dims(const char *function, const char *name1, const Eigen::Matrix< T1, R1, C1 > &y1, const char *name2, const Eigen::Matrix< T2, R2, C2 > &y2)
Return true if the two matrices are of the same size.
Definition: check_matching_dims.hpp:37
Eigen.hpp
stan::math::elt_divide
Eigen::Matrix< typename boost::math::tools::promote_args< T1, T2 >::type, R, C > elt_divide(const Eigen::Matrix< T1, R, C > &m1, const Eigen::Matrix< T2, R, C > &m2)
Return the elementwise division of the specified matrices.
Definition: elt_divide.hpp:24

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