Stan Math Library  2.20.0
reverse mode automatic differentiation
mdivide_left.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_FUN_MDIVIDE_LEFT_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_MDIVIDE_LEFT_HPP
3 
4 #include <boost/math/tools/promotion.hpp>
9 
10 namespace stan {
11 namespace math {
12 
21 template <typename T1, typename T2, int R1, int C1, int R2, int C2>
22 inline Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type,
23  R1, C2>
24 mdivide_left(const Eigen::Matrix<T1, R1, C1> &A,
25  const Eigen::Matrix<T2, R2, C2> &b) {
26  check_square("mdivide_left", "A", A);
27  check_multiplicable("mdivide_left", "A", A, "b", b);
28  return promote_common<Eigen::Matrix<T1, R1, C1>, Eigen::Matrix<T2, R1, C1> >(
29  A)
30  .lu()
31  .solve(
32  promote_common<Eigen::Matrix<T1, R2, C2>, Eigen::Matrix<T2, R2, C2> >(
33  b));
34 }
35 
36 } // namespace math
37 } // namespace stan
38 #endif
Eigen::Matrix< fvar< T >, R1, C2 > mdivide_left(const Eigen::Matrix< fvar< T >, R1, C1 > &A, const Eigen::Matrix< fvar< T >, R2, C2 > &b)
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 check_multiplicable(const char *function, const char *name1, const T1 &y1, const char *name2, const T2 &y2)
Check if the matrices can be multiplied.

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