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dot_product.hpp
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1 #ifndef STAN_MATH_FWD_MAT_FUN_DOT_PRODUCT_HPP
2 #define STAN_MATH_FWD_MAT_FUN_DOT_PRODUCT_HPP
3
4 #include <stan/math/prim/mat/fun/Eigen.hpp>
5 #include <stan/math/prim/mat/fun/typedefs.hpp>
6 #include <stan/math/prim/mat/err/check_vector.hpp>
7 #include <stan/math/prim/mat/err/check_matching_sizes.hpp>
8 #include <stan/math/fwd/mat/fun/typedefs.hpp>
9 #include <stan/math/fwd/mat/fun/to_fvar.hpp>
10 #include <vector>
11
12 namespace stan {
13 namespace math {
14
15 // dot_product for vec (in matrix) * vec (in matrix);
16 // does all combos of row row, col col, row col, col row
17 template<typename T, int R1, int C1, int R2, int C2>
18 inline
19 fvar<T>
20 dot_product(const Eigen::Matrix<fvar<T>, R1, C1>& v1,
21 const Eigen::Matrix<fvar<T>, R2, C2>& v2) {
22 stan::math::check_vector("dot_product", "v1", v1);
23 stan::math::check_vector("dot_product", "v2", v2);
24 stan::math::check_matching_sizes("dot_product",
25 "v1", v1,
26 "v2", v2);
27
28 fvar<T> ret(0, 0);
29 for (size_type i = 0; i < v1.size(); i++)
30 ret += v1(i) * v2(i);
31 return ret;
32 }
33
34 template<typename T, int R1, int C1, int R2, int C2>
35 inline
36 fvar<T>
37 dot_product(const Eigen::Matrix<fvar<T>, R1, C1>& v1,
38 const Eigen::Matrix<double, R2, C2>& v2) {
39 stan::math::check_vector("dot_product", "v1", v1);
40 stan::math::check_vector("dot_product", "v2", v2);
41 stan::math::check_matching_sizes("dot_product",
42 "v1", v1,
43 "v2", v2);
44
45 fvar<T> ret(0, 0);
46 for (size_type i = 0; i < v1.size(); i++)
47 ret += v1(i) * v2(i);
48 return ret;
49 }
50
51 template<typename T, int R1, int C1, int R2, int C2>
52 inline
53 fvar<T>
54 dot_product(const Eigen::Matrix<double, R1, C1>& v1,
55 const Eigen::Matrix<fvar<T>, R2, C2>& v2) {
56 stan::math::check_vector("dot_product", "v1", v1);
57 stan::math::check_vector("dot_product", "v2", v2);
58 stan::math::check_matching_sizes("dot_product",
59 "v1", v1,
60 "v2", v2);
61
62 fvar<T> ret(0, 0);
63 for (size_type i = 0; i < v1.size(); i++)
64 ret += v1(i) * v2(i);
65 return ret;
66 }
67
68 template<typename T, int R1, int C1, int R2, int C2>
69 inline
70 fvar<T>
71 dot_product(const Eigen::Matrix<fvar<T>, R1, C1>& v1,
72 const Eigen::Matrix<fvar<T>, R2, C2>& v2,
73 size_type& length) {
74 stan::math::check_vector("dot_product", "v1", v1);
75 stan::math::check_vector("dot_product", "v2", v2);
76
77 fvar<T> ret(0, 0);
78 for (size_type i = 0; i < length; i++)
79 ret += v1(i) * v2(i);
80 return ret;
81 }
82
83 template<typename T, int R1, int C1, int R2, int C2>
84 inline
85 fvar<T>
86 dot_product(const Eigen::Matrix<fvar<T>, R1, C1>& v1,
87 const Eigen::Matrix<double, R2, C2>& v2,
88 size_type& length) {
89 stan::math::check_vector("dot_product", "v1", v1);
90 stan::math::check_vector("dot_product", "v2", v2);
91
92 fvar<T> ret(0, 0);
93 for (size_type i = 0; i < length; i++)
94 ret += v1(i) * v2(i);
95 return ret;
96 }
97
98 template<typename T, int R1, int C1, int R2, int C2>
99 inline
100 fvar<T>
101 dot_product(const Eigen::Matrix<double, R1, C1>& v1,
102 const Eigen::Matrix<fvar<T>, R2, C2>& v2,
103 size_type& length) {
104 stan::math::check_vector("dot_product", "v1", v1);
105 stan::math::check_vector("dot_product", "v2", v2);
106
107 fvar<T> ret(0, 0);
108 for (size_type i = 0; i < length; i++)
109 ret += v1(i) * v2(i);
110 return ret;
111 }
112
113 template<typename T>
114 inline
115 fvar<T>
116 dot_product(const std::vector<fvar<T> >& v1,
117 const std::vector<fvar<T> >& v2) {
118 stan::math::check_matching_sizes("dot_product",
119 "v1", v1,
120 "v2", v2);
121 fvar<T> ret(0, 0);
122 for (size_t i = 0; i < v1.size(); i++)
123 ret += v1.at(i) * v2.at(i);
124 return ret;
125 }
126
127 template<typename T>
128 inline
129 fvar<T>
130 dot_product(const std::vector<double>& v1,
131 const std::vector<fvar<T> >& v2) {
132 stan::math::check_matching_sizes("dot_product",
133 "v1", v1,
134 "v2", v2);
135 fvar<T> ret(0, 0);
136 for (size_t i = 0; i < v1.size(); i++)
137 ret += v1.at(i) * v2.at(i);
138 return ret;
139 }
140
141 template<typename T>
142 inline
143 fvar<T>
144 dot_product(const std::vector<fvar<T> >& v1,
145 const std::vector<double>& v2) {
146 stan::math::check_matching_sizes("dot_product",
147 "v1", v1,
148 "v2", v2);
149 fvar<T> ret(0, 0);
150 for (size_t i = 0; i < v1.size(); i++)
151 ret += v1.at(i) * v2.at(i);
152 return ret;
153 }
154
155 template<typename T>
156 inline
157 fvar<T>
158 dot_product(const std::vector<fvar<T> >& v1,
159 const std::vector<fvar<T> >& v2,
160 size_type& length) {
161 fvar<T> ret(0, 0);
162 for (size_type i = 0; i < length; i++)
163 ret += v1.at(i) * v2.at(i);
164 return ret;
165 }
166
167 template<typename T>
168 inline
169 fvar<T>
170 dot_product(const std::vector<double>& v1,
171 const std::vector<fvar<T> >& v2,
172 size_type& length) {
173 fvar<T> ret(0, 0);
174 for (size_type i = 0; i < length; i++)
175 ret += v1.at(i) * v2.at(i);
176 return ret;
177 }
178
179 template<typename T>
180 inline
181 fvar<T>
182 dot_product(const std::vector<fvar<T> >& v1,
183 const std::vector<double>& v2,
184 size_type& length) {
185 fvar<T> ret(0, 0);
186 for (size_type i = 0; i < length; i++)
187 ret += v1.at(i) * v2.at(i);
188 return ret;
189 }
190 }
191 }
192 #endif
typedefs.hpp
stan::math::check_vector
bool check_vector(const char *function, const char *name, const Eigen::Matrix< T, R, C > &x)
Return true if the matrix is either a row vector or column vector.
Definition: check_vector.hpp:34
stan::length
size_t length(const std::vector< T > &x)
Definition: length.hpp:10
check_matching_sizes.hpp
stan::math::size_type
Eigen::Matrix< double, Eigen::Dynamic, Eigen::Dynamic >::Index size_type
Type for sizes and indexes in an Eigen matrix with double e.
Definition: typedefs.hpp:13
stan::math::check_matching_sizes
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.
Definition: check_matching_sizes.hpp:29
stan::math::dot_product
fvar< T > dot_product(const Eigen::Matrix< fvar< T >, R1, C1 > &v1, const Eigen::Matrix< fvar< T >, R2, C2 > &v2)
Definition: dot_product.hpp:20
Eigen.hpp
to_fvar.hpp
check_vector.hpp
stan::math::fvar
Definition: fvar.hpp:13
typedefs.hpp

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