1 #ifndef STAN_MATH_PRIM_FUN_DOT_HPP 2 #define STAN_MATH_PRIM_FUN_DOT_HPP 3 4 #include <stan/math/prim/meta.hpp> 5 #include <vector> 6 #include <cstddef> 7 8 namespace stan { 9 namespace math { 10 dot(const std::vector<double> & x,const std::vector<double> & y)11inline double dot(const std::vector<double>& x, const std::vector<double>& y) { 12 double sum = 0.0; 13 for (size_t i = 0; i < x.size(); ++i) { 14 sum += x[i] * y[i]; 15 } 16 return sum; 17 } 18 19 } // namespace math 20 } // namespace stan 21 #endif 22