Miic.h

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 *       - Christophe GONZALES(_at_AMU)                                     *
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 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
 *       - Christophe GONZALES(_at_AMU)                                     *
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#ifndef GUM_LEARNING_MIIC_H
#define GUM_LEARNING_MIIC_H
 
#include <agrum/base/core/heap.h>
#include <agrum/BN/learning/ConstraintBasedLearning.h>
#include <agrum/BN/learning/correctedMutualInformation.h>
 
namespace gum {
 
  namespace learning {
 
    using CondThreePoints      = std::tuple< NodeId, NodeId, NodeId, std::vector< NodeId > >;
    using CondRanking          = std::pair< CondThreePoints*, double >;
    using Ranking              = std::pair< ThreePoints*, double >;
    using ProbabilisticRanking = std::tuple< ThreePoints*, double, double, double >;
 
    class GreaterPairOn2nd {
      public:
      bool operator()(const CondRanking& e1, const CondRanking& e2) const;
    };
 
    class GreaterAbsPairOn2nd {
      public:
      bool operator()(const Ranking& e1, const Ranking& e2) const;
    };
 
    class GreaterTupleOnLast {
      public:
      bool operator()(const ProbabilisticRanking& e1, const ProbabilisticRanking& e2) const;
    };

    class Miic: public ConstraintBasedLearning {
      public:
      // ##########################################################################
      // ##########################################################################
 
      Miic();
      explicit Miic(int maxLog);
      Miic(const Miic& from);
      Miic(Miic&& from);
      ~Miic() override;

 
      Miic& operator=(const Miic& from);
      Miic& operator=(Miic&& from);
 
      // ##########################################################################
      // ##########################################################################
 
      void setMutualInformation(CorrectedMutualInformation& mi);

 
      // ##########################################################################
      // ##########################################################################
 
      MixedGraph learnSkeleton(MixedGraph graph) override;
 
      MixedGraph learnMixedStructure(MixedGraph graph) override;

 
      protected:
      // ##########################################################################
      // ##########################################################################
 
      void initiation_(CorrectedMutualInformation& mutualInformation,
                       MixedGraph&                 graph,
                       HashTable< std::pair< NodeId, NodeId >, std::vector< NodeId > >& sepSet,
                       Heap< CondRanking, GreaterPairOn2nd >&                           rank);
 
      void iteration_(CorrectedMutualInformation& mutualInformation,
                      MixedGraph&                 graph,
                      HashTable< std::pair< NodeId, NodeId >, std::vector< NodeId > >& sepSet,
                      Heap< CondRanking, GreaterPairOn2nd >&                           rank);

 
      // ##########################################################################
      // ##########################################################################
 
      void orientationMiic_(
          CorrectedMutualInformation&                                            mutualInformation,
          MixedGraph&                                                            graph,
          const HashTable< std::pair< NodeId, NodeId >, std::vector< NodeId > >& sepSet);
 
      void findBestContributor_(NodeId                                 x,
                                NodeId                                 y,
                                const std::vector< NodeId >&           ui,
                                const MixedGraph&                      graph,
                                CorrectedMutualInformation&            mutualInformation,
                                Heap< CondRanking, GreaterPairOn2nd >& rank);
 
      std::vector< ProbabilisticRanking > unshieldedTriplesMiic_(
          const MixedGraph&                                                      graph,
          CorrectedMutualInformation&                                            mutualInformation,
          const HashTable< std::pair< NodeId, NodeId >, std::vector< NodeId > >& sepSet,
          HashTable< std::pair< NodeId, NodeId >, char >&                        marks);
 
      std::vector< ProbabilisticRanking >
          updateProbaTriples_(const MixedGraph&                   graph,
                              std::vector< ProbabilisticRanking > probaTriples);

 
      private:
      CorrectedMutualInformation* mi_{nullptr};
      ArcProperty< double >       _arcProbas_;
 
      void _orientingVstructureMiic_(MixedGraph&                                     graph,
                                     HashTable< std::pair< NodeId, NodeId >, char >& marks,
                                     NodeId                                          x,
                                     NodeId                                          y,
                                     NodeId                                          z,
                                     double                                          p1,
                                     double                                          p2);
 
      void _propagatingOrientationMiic_(MixedGraph&                                     graph,
                                        HashTable< std::pair< NodeId, NodeId >, char >& marks,
                                        NodeId                                          x,
                                        NodeId                                          y,
                                        NodeId                                          z,
                                        double                                          p1,
                                        double                                          p2);
 
      bool _isNotLatentCouple_(NodeId x, NodeId y);
    };
 
  } /* namespace learning */
 
} /* namespace gum */
 
#endif /* GUM_LEARNING_MIIC_H */