Stan Math Library  2.20.0
reverse mode automatic differentiation
mdivide_right_tri.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_FUN_MDIVIDE_RIGHT_TRI_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_MDIVIDE_RIGHT_TRI_HPP
3 
11 #include <boost/math/tools/promotion.hpp>
12 
13 namespace stan {
14 namespace math {
15 
25 template <int TriView, typename T1, typename T2, int R1, int C1, int R2, int C2>
26 inline Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type,
27  R1, C2>
28 mdivide_right_tri(const Eigen::Matrix<T1, R1, C1> &b,
29  const Eigen::Matrix<T2, R2, C2> &A) {
30  check_square("mdivide_right_tri", "A", A);
31  check_multiplicable("mdivide_right_tri", "b", b, "A", A);
32  if (TriView != Eigen::Lower && TriView != Eigen::Upper)
33  domain_error("mdivide_left_tri",
34  "triangular view must be Eigen::Lower or Eigen::Upper", "",
35  "");
36  return promote_common<Eigen::Matrix<T1, R2, C2>, Eigen::Matrix<T2, R2, C2> >(
37  A)
38  .template triangularView<TriView>()
39  .transpose()
40  .solve(
41  promote_common<Eigen::Matrix<T1, R1, C1>, Eigen::Matrix<T2, R1, C1> >(
42  b)
43  .transpose())
44  .transpose();
45 }
46 
47 } // namespace math
48 } // namespace stan
49 #endif
Eigen::Matrix< typename boost::math::tools::promote_args< T1, T2 >::type, R1, C2 > mdivide_right_tri(const Eigen::Matrix< T1, R1, C1 > &b, const Eigen::Matrix< T2, R2, C2 > &A)
Returns the solution of the system Ax=b when A is triangular.
void check_square(const char *function, const char *name, const matrix_cl &y)
Check if the matrix_cl is square.
common_type< T1, T2 >::type promote_common(const F &u)
Return the result of promoting either a scalar or the scalar elements of a container to either of two...
void domain_error(const char *function, const char *name, const T &y, const char *msg1, const char *msg2)
Throw a domain error with a consistently formatted message.
void check_multiplicable(const char *function, const char *name1, const T1 &y1, const char *name2, const T2 &y2)
Check if the matrices can be multiplied.
matrix_cl transpose(const matrix_cl &src)
Takes the transpose of the matrix on the OpenCL device.
Definition: transpose.hpp:20

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