multiDimNoisyORNet_tpl.h

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 *       - Pierre-Henri WUILLEMIN(_at_LIP6)                                 *
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#pragma once
 

 
#include <agrum/base/multidim/ICIModels/multiDimNoisyORNet.h>
 
namespace gum {
 
  // Default constructor
  template < typename GUM_SCALAR >
  INLINE MultiDimNoisyORNet< GUM_SCALAR >::MultiDimNoisyORNet(GUM_SCALAR external_weight,
                                                              GUM_SCALAR default_weight) :
      MultiDimICIModel< GUM_SCALAR >(external_weight, default_weight) {
    GUM_CONSTRUCTOR(MultiDimNoisyORNet);
  }
 
  // Default constructor
  template < typename GUM_SCALAR >
  INLINE MultiDimNoisyORNet< GUM_SCALAR >::MultiDimNoisyORNet(
      const MultiDimNoisyORNet< GUM_SCALAR >& from) : MultiDimICIModel< GUM_SCALAR >(from) {
    GUM_CONS_CPY(MultiDimNoisyORNet);
  }
 
  // Copy constructor using a bijection to replace variables from source.
  template < typename GUM_SCALAR >
  INLINE MultiDimNoisyORNet< GUM_SCALAR >::MultiDimNoisyORNet(
      const Bijection< const DiscreteVariable*, const DiscreteVariable* >& bij,
      const MultiDimNoisyORNet< GUM_SCALAR >& from) : MultiDimICIModel< GUM_SCALAR >(bij, from) {
    GUM_CONSTRUCTOR(MultiDimNoisyORNet);
  }
 
  // destructor
  template < typename GUM_SCALAR >
  INLINE MultiDimNoisyORNet< GUM_SCALAR >::~MultiDimNoisyORNet() {
    GUM_DESTRUCTOR(MultiDimNoisyORNet);
  }
 
  template < typename GUM_SCALAR >
  GUM_SCALAR MultiDimNoisyORNet< GUM_SCALAR >::get(const Instantiation& i) const {
    if (this->nbrDim() < 1) { GUM_ERROR(OperationNotAllowed, "Not enough variable for a NoisyOr ") }
 
    const DiscreteVariable& C = this->variable((Idx)0);
 
    if (i.val(C) > 1) return (GUM_SCALAR)0.0;
 
    GUM_SCALAR ratio = (GUM_SCALAR)1.0 - this->externalWeight();
 
    GUM_SCALAR fact = (GUM_SCALAR)ratio;
 
    if (fact != (GUM_SCALAR)0) {
      for (Idx j = 1; j < this->nbrDim(); j++) {
        const DiscreteVariable& v = this->variable(j);
 
        if (i.val(v) == 1) {
          GUM_SCALAR pr = (1 - this->causalWeight(v));
 
          if (pr == (GUM_SCALAR)0.0) {
            fact = (GUM_SCALAR)0.0;
            break;
          } else {
            fact *= pr;
          }
        }
      }
    }
 
    return (i.val(C) != 1) ? fact : (GUM_SCALAR)1.0 - fact;
  }
 
  template < typename GUM_SCALAR >
  std::string MultiDimNoisyORNet< GUM_SCALAR >::toString() const {
    std::stringstream s;
    s << MultiDimImplementation< GUM_SCALAR >::variable(0) << "=noisyORNet(["
      << this->externalWeight() << "]";
 
    for (Idx i = 1; i < MultiDimImplementation< GUM_SCALAR >::nbrDim(); i++)
      s << ", " << MultiDimImplementation< GUM_SCALAR >::variable(i) << "["
        << this->causalWeight(MultiDimImplementation< GUM_SCALAR >::variable(i)) << "]";
 
    s << ")";
    return s.str();
  }
 
  // For friendly displaying the content of the variable.
  template < typename GUM_SCALAR >
  INLINE std::ostream& operator<<(std::ostream& s, const MultiDimNoisyORNet< GUM_SCALAR >& ag) {
    return s << ag.toString();
  }
 
  template < typename GUM_SCALAR >
  INLINE MultiDimContainer< GUM_SCALAR >* MultiDimNoisyORNet< GUM_SCALAR >::newFactory() const {
    return new MultiDimNoisyORNet< GUM_SCALAR >(this->_external_weight_, this->_default_weight_);
  }
 
  // returns the name of the implementation
  template < typename GUM_SCALAR >
  INLINE const std::string& MultiDimNoisyORNet< GUM_SCALAR >::name() const {
    static const std::string str = "MultiDimNoisyORNet";
    return str;
  }
 
} /* namespace gum */