Stan Math Library  2.11.0
reverse mode automatic differentiation
dot_self.hpp
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1 #ifndef STAN_MATH_PRIM_ARR_FUN_DOT_SELF_HPP
2 #define STAN_MATH_PRIM_ARR_FUN_DOT_SELF_HPP
3 
4 #include <vector>
5 #include <cstddef>
6 
7 namespace stan {
8  namespace math {
9 
10  // x' * x
11  inline double dot_self(const std::vector<double>& x) {
12  double sum = 0.0;
13  for (size_t i = 0; i < x.size(); ++i)
14  sum += x[i] * x[i];
15  return sum;
16  }
17 
18  }
19 }
20 
21 #endif
fvar< T > sum(const std::vector< fvar< T > > &m)
Return the sum of the entries of the specified standard vector.
Definition: sum.hpp:20
fvar< T > dot_self(const Eigen::Matrix< fvar< T >, R, C > &v)
Definition: dot_self.hpp:16

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