IMarkovRandomField.h

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 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
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#ifndef GUM_SIMPLE_MARKOV_NET_H
#define GUM_SIMPLE_MARKOV_NET_H
 
#include <utility>
 
#include <agrum/agrum.h>
 
#include <agrum/base/graphicalModels/UGmodel.h>
#include <agrum/base/multidim/tensor.h>
 
namespace gum {
  template < GUM_Numeric GUM_SCALAR >
  using FactorTable = HashTable< NodeSet, const Tensor< GUM_SCALAR >* >;

  template < GUM_Numeric GUM_SCALAR >
  class IMarkovRandomField: public UGmodel {
    public:
    // ===========================================================================
    // ===========================================================================

    IMarkovRandomField();
    explicit IMarkovRandomField(std::string_view name);

    ~IMarkovRandomField() override;

    IMarkovRandomField(const IMarkovRandomField< GUM_SCALAR >& source);

    IMarkovRandomField< GUM_SCALAR >& operator=(const IMarkovRandomField< GUM_SCALAR >& source);

 
 
    // ===========================================================================
    // ===========================================================================

    virtual const Tensor< GUM_SCALAR >& factor(const NodeSet& varIds) const = 0;

    virtual const NodeSet& smallestFactorFromNode(NodeId node) const = 0;

    virtual const NodeSet& smallestFactorFromNode(std::string_view name) const;

    virtual const FactorTable< GUM_SCALAR >& factors() const = 0;


    bool operator==(const IMarkovRandomField< GUM_SCALAR >& from) const;

    Size dim() const;

 
    Size maxVarDomainSize() const;

    GUM_SCALAR minParam() const;

    GUM_SCALAR maxParam() const;

    GUM_SCALAR minNonZeroParam() const;

    GUM_SCALAR maxNonOneParam() const;

    virtual std::string toDot() const;

    virtual std::string toDotAsFactorGraph() const;

    std::string toString() const;
 
    /***
     * @return the minimal subset of soids that conditions the target
     *
     * i.e. P(target| soids)=P(target|@return)
     */
    NodeSet minimalCondSet(NodeId target, const NodeSet& soids) const;
 
 
    /***
     * @return the minimal subset of soids that conditions the targets
     *
     * i.e. P(targets| soids)=P(targets|@return)
     */
    NodeSet minimalCondSet(const NodeSet& targets, const NodeSet& soids) const;
 
    private:
    void _minimalCondSetVisit_(NodeId         node,
                               const NodeSet& soids,
                               NodeSet&       minimal,
                               NodeSet&       alreadyVisited) const;
  };
 
 
#ifndef GUM_NO_EXTERN_TEMPLATE_CLASS
  extern template class IMarkovRandomField< double >;
#endif
 

  template < GUM_Numeric GUM_SCALAR >
  std::ostream& operator<<(std::ostream& output, const IMarkovRandomField< GUM_SCALAR >& mn);
 
} /* namespace gum */
 
#include <agrum/MRF/IMarkovRandomField_tpl.h>
 
#endif /* GUM_SIMPLE_MARKOV_NET_H */