sigmoid_cross_entropy_error.hpp

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#ifndef MLPACK_METHODS_ANN_LOSS_FUNCTION_SIGMOID_CROSS_ENTROPY_ERROR_HPP
#define MLPACK_METHODS_ANN_LOSS_FUNCTION_SIGMOID_CROSS_ENTROPY_ERROR_HPP

#include <mlpack/prereqs.hpp>

namespace mlpack {
namespace ann  {

template <
    typename InputDataType = arma::mat,
    typename OutputDataType = arma::mat
>
class SigmoidCrossEntropyError
{
 public:
  SigmoidCrossEntropyError();

  template<typename PredictionType, typename TargetType>
  inline typename PredictionType::elem_type Forward(
      const PredictionType& prediction,
      const TargetType& target);

  template<typename PredictionType, typename TargetType, typename LossType>
  inline void Backward(const PredictionType& prediction,
                       const TargetType& target,
                       LossType& loss);

  OutputDataType& OutputParameter() const { return outputParameter; }
  OutputDataType& OutputParameter() { return outputParameter; }

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

 private:
  OutputDataType outputParameter;
}; // class SigmoidCrossEntropy

} // namespace ann
} // namespace mlpack

// Include implementation.
#include "sigmoid_cross_entropy_error_impl.hpp"

#endif