dist.hpp

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#ifndef __STAN__MATH__MATRIX__DIST_HPP__
#define __STAN__MATH__MATRIX__DIST_HPP__

#include <stan/math/matrix/Eigen.hpp>
#include <stan/math/matrix/validate_vector.hpp>
#include <stan/math/matrix/validate_matching_sizes.hpp>

namespace stan {
  namespace math {
    
    template<int R1,int C1,int R2, int C2>
    inline double dist(const Eigen::Matrix<double, R1, C1>& v1, 
                       const Eigen::Matrix<double, R2, C2>& v2) {
      validate_vector(v1,"dist");
      validate_vector(v2,"dist");
      validate_matching_sizes(v1,v2,"dist");
      return (v1-v2).norm();
    }
    
    template<int R1,int C1,int R2, int C2>
    inline double squared_dist(const Eigen::Matrix<double, R1, C1>& v1, 
                               const Eigen::Matrix<double, R2, C2>& v2) {
      validate_vector(v1,"squared_dist");
      validate_vector(v2,"squared_dist");
      validate_matching_sizes(v1,v2,"squared_dist");
      return (v1-v2).squaredNorm();
    }
  }
}
#endif