const_init.hpp

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#ifndef MLPACK_METHODS_ANN_INIT_RULES_CONST_INIT_HPP
#define MLPACK_METHODS_ANN_INIT_RULES_CONST_INIT_HPP

#include <mlpack/prereqs.hpp>

namespace mlpack {
namespace ann  {

class ConstInitialization
{
 public:
  ConstInitialization(const double initVal = 0) : initVal(initVal)
  { /* Nothing to do here */ }

  template<typename eT>
  void Initialize(arma::Mat<eT>& W, const size_t rows, const size_t cols)
  {
    if (W.is_empty())
      W.set_size(rows, cols);

    W.fill(initVal);
  }

  template<typename eT>
  void Initialize(arma::Mat<eT>& W)
  {
    if (W.is_empty())
      Log::Fatal << "Cannot initialize an empty matrix." << std::endl;

    W.fill(initVal);
  }

  template<typename eT>
  void Initialize(arma::Cube<eT>& W,
                  const size_t rows,
                  const size_t cols,
                  const size_t slices)
  {
    if (W.is_empty())
      W.set_size(rows, cols, slices);

    W.fill(initVal);
  }

  template<typename eT>
  void Initialize(arma::Cube<eT>& W)
  {
    if (W.is_empty())
      Log::Fatal << "Cannot initialize an empty cube." << std::endl;

    W.fill(initVal);
  }

  double const& InitValue() const { return initVal; }
  double& initValue() { return initVal; }

 private:
  double initVal;
}; // class ConstInitialization

} // namespace ann
} // namespace mlpack

#endif