Stan Math Library  2.15.0
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
23  Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type,
24  R1, C2>
25  mdivide_left(const Eigen::Matrix<T1, R1, C1> &A,
26  const Eigen::Matrix<T2, R2, C2> &b) {
27  check_square("mdivide_left", "A", A);
28  check_multiplicable("mdivide_left", "A", A, "b", b);
29  return promote_common<Eigen::Matrix<T1, R1, C1>,
30  Eigen::Matrix<T2, R1, C1> >(A)
31  .lu()
32  .solve(promote_common<Eigen::Matrix<T1, R2, C2>,
33  Eigen::Matrix<T2, R2, C2> >(b));
34  }
35 
36  }
37 }
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)
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.
void check_square(const char *function, const char *name, const Eigen::Matrix< T_y, Eigen::Dynamic, Eigen::Dynamic > &y)
Check if the specified matrix is square.

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