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mdivide_left_tri.hpp
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#ifndef STAN_MATH_PRIM_MAT_FUN_MDIVIDE_LEFT_TRI_HPP
#define STAN_MATH_PRIM_MAT_FUN_MDIVIDE_LEFT_TRI_HPP
#include <boost/math/tools/promotion.hpp>
#include <stan/math/prim/mat/fun/Eigen.hpp>
#include <stan/math/prim/mat/fun/promote_common.hpp>
#include <stan/math/prim/mat/err/check_multiplicable.hpp>
#include <stan/math/prim/mat/err/check_square.hpp>
namespace stan {
namespace math {
template <int TriView, typename T1, typename T2,
int R1, int C1, int R2, int C2>
inline
Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type,
R1, C2>
mdivide_left_tri(const Eigen::Matrix<T1, R1, C1> &A,
const Eigen::Matrix<T2, R2, C2> &b) {
stan::math::check_square("mdivide_left_tri", "A", A);
stan::math::check_multiplicable("mdivide_left_tri",
"A", A,
"b", b);
return promote_common<Eigen::Matrix<T1, R1, C1>,
Eigen::Matrix<T2, R1, C1> >(A)
.template triangularView<TriView>()
.solve(promote_common<Eigen::Matrix<T1, R2, C2>,
Eigen::Matrix<T2, R2, C2> >(b));
}
template<int TriView, typename T, int R1, int C1>
inline
Eigen::Matrix<T, R1, C1>
mdivide_left_tri(const Eigen::Matrix<T, R1, C1> &A) {
stan::math::check_square("mdivide_left_tri", "A", A);
int n = A.rows();
Eigen::Matrix<T, Eigen::Dynamic, Eigen::Dynamic> b;
b.setIdentity(n, n);
A.template triangularView<TriView>().solveInPlace(b);
return b;
}
}
}
#endif
check_multiplicable.hpp
promote_common.hpp
stan::math::promote_common
common_type< T1, T2 >::type promote_common(const F &u)
Definition: promote_common.hpp:14
stan::math::mdivide_left_tri
Eigen::Matrix< typename boost::math::tools::promote_args< T1, T2 >::type, R1, C2 > mdivide_left_tri(const Eigen::Matrix< T1, R1, C1 > &A, const Eigen::Matrix< T2, R2, C2 > &b)
Returns the solution of the system Ax=b when A is triangular.
Definition: mdivide_left_tri.hpp:27
stan::math::check_multiplicable
bool check_multiplicable(const char *function, const char *name1, const T1 &y1, const char *name2, const T2 &y2)
Return true if the matrices can be multiplied.
Definition: check_multiplicable.hpp:33
Eigen.hpp
stan::math::check_square
bool check_square(const char *function, const char *name, const Eigen::Matrix< T_y, Eigen::Dynamic, Eigen::Dynamic > &y)
Return true if the specified matrix is square.
Definition: check_square.hpp:28
check_square.hpp

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