Stan Math Library  2.10.0
reverse mode automatic differentiation
diag_pre_multiply.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_FUN_DIAG_PRE_MULTIPLY_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_DIAG_PRE_MULTIPLY_HPP
3 
5 #include <boost/math/tools/promotion.hpp>
6 #include <stdexcept>
7 
8 namespace stan {
9  namespace math {
10 
11  template <typename T1, typename T2, int R1, int C1, int R2, int C2>
12  Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type,
13  R2, C2>
14  diag_pre_multiply(const Eigen::Matrix<T1, R1, C1>& m1,
15  const Eigen::Matrix<T2, R2, C2>& m2) {
16  if (m1.cols() != 1 && m1.rows() != 1)
17  throw std::domain_error("m1 must be a vector");
18  int m2_rows = m2.rows();
19  if (m1.size() != m2_rows)
20  throw std::domain_error("m1 must have same length as m2 has rows");
21  int m2_cols = m2.cols();
22  Eigen::Matrix<typename boost::math::tools::promote_args<T1, T2>::type,
23  R2, C2>
24  result(m2_rows, m2_cols);
25  for (int j = 0; j < m2_cols; ++j)
26  for (int i = 0; i < m2_rows; ++i)
27  result(i, j) = m1(i) * m2(i, j);
28  return result;
29  }
30 
31  }
32 }
33 #endif
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.
Eigen::Matrix< typename boost::math::tools::promote_args< T1, T2 >::type, R2, C2 > diag_pre_multiply(const Eigen::Matrix< T1, R1, C1 > &m1, const Eigen::Matrix< T2, R2, C2 > &m2)

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