merge_init.hpp

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#ifndef MLPACK_METHODS_AMF_MERGE_INIT_HPP
#define MLPACK_METHODS_AMF_MERGE_INIT_HPP

#include <mlpack/prereqs.hpp>

namespace mlpack {
namespace amf {

template<typename WInitializationRuleType, typename HInitializationRuleType>
class MergeInitialization
{
 public:
  // Empty constructor required for the InitializeRule template
  MergeInitialization() { }

  // Initialize the MergeInitialization object with existing initialization
  // rules.
  MergeInitialization(const WInitializationRuleType& wInitRule,
                      const HInitializationRuleType& hInitRule) :
                      wInitializationRule(wInitRule),
                      hInitializationRule(hInitRule)
  { }

  template<typename MatType>
  inline void Initialize(const MatType& V,
                         const size_t r,
                         arma::mat& W,
                         arma::mat& H)
  {
    wInitializationRule.InitializeOne(V, r, W);
    hInitializationRule.InitializeOne(V, r, H, false);
  }

 private:
  // Initialization rule for W matrix
  WInitializationRuleType wInitializationRule;
  // Initialization rule for H matrix
  HInitializationRuleType hInitializationRule;
};

} // namespace amf
} // namespace mlpack

#endif