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columns_dot_self.hpp
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1 #ifndef STAN__MATH__MATRIX__COLUMNS_DOT_SELF_HPP
2 #define STAN__MATH__MATRIX__COLUMNS_DOT_SELF_HPP
3 
4 #include <stan/math/matrix/Eigen.hpp>
5 
6 namespace stan {
7  namespace math {
8 
14  template<typename T,int R,int C>
15  inline Eigen::Matrix<T,1,C>
16  columns_dot_self(const Eigen::Matrix<T,R,C>& x) {
17  return x.colwise().squaredNorm();
18  }
19 
20  }
21 }
22 #endif
stan::math::columns_dot_self
Eigen::Matrix< T, 1, C > columns_dot_self(const Eigen::Matrix< T, R, C > &x)
Returns the dot product of each column of a matrix with itself.
Definition: columns_dot_self.hpp:16
Eigen.hpp
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