Stan Math Library  2.9.0
reverse mode automatic differentiation
multiply.hpp
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1 #ifndef STAN_MATH_PRIM_MAT_FUN_MULTIPLY_HPP
2 #define STAN_MATH_PRIM_MAT_FUN_MULTIPLY_HPP
3 
4 #include <boost/type_traits/is_arithmetic.hpp>
5 #include <boost/utility/enable_if.hpp>
9 
10 namespace stan {
11  namespace math {
12 
21  template <int R, int C, typename T>
22  inline
23  typename boost::enable_if_c<boost::is_arithmetic<T>::value,
24  Eigen::Matrix<double, R, C> >::type
25  multiply(const Eigen::Matrix<double, R, C>& m,
26  T c) {
27  return c * m;
28  }
29 
30  // FIXME: apply above pattern everywhere below to remove
31  // extra defs, etc.
32 
41  template <int R, int C, typename T>
42  inline
43  typename boost::enable_if_c<boost::is_arithmetic<T>::value,
44  Eigen::Matrix<double, R, C> >::type
45  multiply(T c,
46  const Eigen::Matrix<double, R, C>& m) {
47  return c * m;
48  }
49 
60  template<int R1, int C1, int R2, int C2>
61  inline Eigen::Matrix<double, R1, C2>
62  multiply(const Eigen::Matrix<double, R1, C1>& m1,
63  const Eigen::Matrix<double, R2, C2>& m2) {
65  "m1", m1,
66  "m2", m2);
67  return m1*m2;
68  }
69 
79  template<int C1, int R2>
80  inline double multiply(const Eigen::Matrix<double, 1, C1>& rv,
81  const Eigen::Matrix<double, R2, 1>& v) {
83  "rv", rv,
84  "v", v);
85  if (rv.size() != v.size())
86  throw std::domain_error("rv.size() != v.size()");
87  return rv.dot(v);
88  }
89 
90  }
91 }
92 #endif
Eigen::Matrix< fvar< T >, R1, C1 > multiply(const Eigen::Matrix< fvar< T >, R1, C1 > &m, const fvar< T > &c)
Definition: multiply.hpp:20
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.
bool check_matching_sizes(const char *function, const char *name1, const T_y1 &y1, const char *name2, const T_y2 &y2)
Return true if two structures at the same size.
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.

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