no_normalization.hpp

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#ifndef MLPACK_METHODS_CF_NORMALIZATION_NO_NORMALIZATION_HPP
#define MLPACK_METHODS_CF_NORMALIZATION_NO_NORMALIZATION_HPP

#include <mlpack/prereqs.hpp>

namespace mlpack {
namespace cf {

class NoNormalization
{
 public:
  // Empty constructor.
  NoNormalization() { }

  template<typename MatType>
  inline void Normalize(const MatType& /* data */) const { }

  inline double Denormalize(const size_t /* user */,
                            const size_t /* item */,
                            const double rating) const
  {
    return rating;
  }

  inline void Denormalize(const arma::Mat<size_t>& /* combinations */,
                          const arma::vec& /* predictions */) const
  { }

  template<typename Archive>
  void serialize(Archive& /* ar */, const uint32_t /* version */) { }
};

} // namespace cf
} // namespace mlpack

#endif