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mdivide_left.hpp
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1 #ifndef STAN__MATH__MATRIX__MDIVIDE_LEFT_HPP
2 #define STAN__MATH__MATRIX__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,R1,C2>
24  mdivide_left(const Eigen::Matrix<T1,R1,C1> &A,
25  const Eigen::Matrix<T2,R2,C2> &b) {
26  stan::math::check_square("mdivide_left(%1%)",A,"A",(double*)0);
27  stan::math::check_multiplicable("mdivide_left(%1%)",A,"A",
28  b,"b",(double*)0);
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
bool check_multiplicable(const char *function, const T1 &y1, const char *name1, const T2 &y2, const char *name2, T_result *result)
common_type< T1, T2 >::type promote_common(const F &u)
bool check_square(const char *function, const Eigen::Matrix< T_y, Eigen::Dynamic, Eigen::Dynamic > &y, const char *name, T_result *result)
Return true if the specified matrix is square.
Eigen::Matrix< typename boost::math::tools::promote_args< T1, T2 >::type, R1, C2 > mdivide_left(const Eigen::Matrix< T1, R1, C1 > &A, const Eigen::Matrix< T2, R2, C2 > &b)
Returns the solution of the system Ax=b.

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