columns_dot_self.hpp

Go to the documentation of this file.

#ifndef STAN_MATH_PRIM_FUN_COLUMNS_DOT_SELF_HPP
#define STAN_MATH_PRIM_FUN_COLUMNS_DOT_SELF_HPP
 
#include <stan/math/prim/meta.hpp>
#include <stan/math/prim/fun/Eigen.hpp>
 
namespace stan {
namespace math {
 
template <typename T, require_eigen_t<T>* = nullptr,
          require_not_eigen_vt<is_var, T>* = nullptr>
inline auto columns_dot_self(T&& x) {
  return make_holder(
      [](auto&& x_) {
        return std::forward<decltype(x_)>(x_).colwise().squaredNorm();
      },
      std::forward<T>(x));
}
 
}  // namespace math
}  // namespace stan
 
#endif