regress.h

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 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
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#ifndef GUM_REGRESS_H
#define GUM_REGRESS_H
 
#include <agrum/base/multidim/utils/FunctionGraphUtilities/operators/o4DGContext.h>
 
namespace gum {

  template < typename GUM_ELEMENT,
             template < typename > class COMBINEOPERATOR,
             template < typename > class PROJECTOPERATOR,
             template < typename > class TerminalNodePolicy = ExactTerminalNodePolicy >
  class Regress {
    public:
    // ============================================================================
    // ============================================================================

    Regress(const MultiDimFunctionGraph< GUM_ELEMENT, TerminalNodePolicy >* vfunction,
            const MultiDimFunctionGraph< GUM_ELEMENT, TerminalNodePolicy >* probDist,
            const gum::VariableSet*                                         primedVars,
            const DiscreteVariable*                                         targetVar,
            const GUM_ELEMENT                                               neutral);

    ~Regress();

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

    MultiDimFunctionGraph< GUM_ELEMENT, TerminalNodePolicy >* compute();

 
    private:
    void _establishVarOrder_();

    void _findRetrogradeVariables_(
        const MultiDimFunctionGraph< GUM_ELEMENT, TerminalNodePolicy >* dg,
        HashTable< NodeId, short int* >&                                dgInstNeed);

    NodeId _compute_(O4DGContext& currentSituation, Idx lastInstVarPos);

    const MultiDimFunctionGraph< GUM_ELEMENT, TerminalNodePolicy >* _DG1_;

    const MultiDimFunctionGraph< GUM_ELEMENT, TerminalNodePolicy >* _DG2_;

    MultiDimFunctionGraph< GUM_ELEMENT, TerminalNodePolicy >* _rd_;

    const gum::VariableSet* _primedVars_;

    const DiscreteVariable* _targetVar_;

    const GUM_ELEMENT _neutral_;

    Idx _nbVar_;

    const COMBINEOPERATOR< GUM_ELEMENT > _combine_;
    const PROJECTOPERATOR< GUM_ELEMENT > _project_;

    HashTable< double, NodeId > _explorationTable_;

    HashTable< NodeId, short int* > _DG1InstantiationNeeded_;
    HashTable< NodeId, short int* > _DG2InstantiationNeeded_;

    short int* _default_;
  };
 
#ifndef GUM_NO_EXTERN_TEMPLATE_CLASS
  extern template class Regress< double, std::multiplies, std::plus >;
#endif
 
}   // namespace gum
 
#include <agrum/base/multidim/utils/FunctionGraphUtilities/operators/regress_tpl.h>
 
#endif   // GUM_REGRESS_H