gum::SimpleCPTGenerator< GUM_SCALAR > Class Template Reference

<agrum/BN/generator/simpleCPTGenerator.h> More...

#include <simpleCPTGenerator.h>

Inherits gum::ICPTGenerator< GUM_SCALAR >.

Public Member Functions
Constructors / Destructor
	SimpleCPTGenerator ()
	Default constructor. More...
	~SimpleCPTGenerator () override
	Destructor. More...
CPT generation methods
void	generateCPT (const Idx &varId, const Potential< GUM_SCALAR > &cpt) override
	Generates a CPT using floats. More...

Detailed Description

template<typename GUM_SCALAR>
class gum::SimpleCPTGenerator< GUM_SCALAR >

<agrum/BN/generator/simpleCPTGenerator.h>

Class for generating Conditional Probability Tables.

This class implements a CPTGenerator CPT generation algorithm.

Definition at line 43 of file simpleCPTGenerator.h.

Constructor & Destructor Documentation

SimpleCPTGenerator()

template<typename GUM_SCALAR >

INLINE gum::SimpleCPTGenerator< GUM_SCALAR >::SimpleCPTGenerator

(

)

Default constructor.

Definition at line 34 of file simpleCPTGenerator_tpl.h.

                                                              :
      ICPTGenerator< GUM_SCALAR >() {
    GUM_CONSTRUCTOR(SimpleCPTGenerator);
  }

~SimpleCPTGenerator()

template<typename GUM_SCALAR >

INLINE gum::SimpleCPTGenerator< GUM_SCALAR >::~SimpleCPTGenerator ( )

override

Destructor.

Definition at line 41 of file simpleCPTGenerator_tpl.h.

                                                               {
    GUM_DESTRUCTOR(SimpleCPTGenerator);
  }

Member Function Documentation

generateCPT()

template<typename GUM_SCALAR >

void gum::SimpleCPTGenerator< GUM_SCALAR >::generateCPT ( const Idx &  varId, const Potential< GUM_SCALAR > &  cpt  )

override

Generates a CPT using floats.

Parameters

varId	The variable id of the CPT owner.
cpt	A reference on the CPT to fill.

Definition at line 50 of file simpleCPTGenerator_tpl.h.

References gum::Instantiation::add(), gum::MultiDimDecorator< GUM_SCALAR >::domainSize(), gum::Instantiation::end(), gum::Potential< GUM_SCALAR >::fillWith(), gum::Instantiation::incIn(), gum::Instantiation::incOut(), gum::randomValue(), gum::MultiDimDecorator< GUM_SCALAR >::set(), gum::Instantiation::setFirstIn(), gum::Instantiation::setFirstOut(), gum::Instantiation::unsetEnd(), and gum::MultiDimDecorator< GUM_SCALAR >::variable().

Referenced by gum::BayesNet< double >::generateCPT().

                                                           {
    std::vector< GUM_SCALAR > v;

    v.reserve(cpt.domainSize());
    for (Size i = 0; i < cpt.domainSize(); ++i) {
      v.push_back((GUM_SCALAR)randomValue(10000));
    }

    cpt.fillWith(v);
    Instantiation varInst;
    varInst.add(cpt.variable(varId));
    Instantiation cptInst(cpt);

    for (cptInst.setFirstOut(varInst); !cptInst.end(); cptInst.incOut(varInst)) {
      GUM_SCALAR sum = (GUM_SCALAR)0;

      for (cptInst.setFirstIn(varInst); !cptInst.end(); cptInst.incIn(varInst)) {
        sum += cpt[cptInst];
      }

      for (cptInst.setFirstIn(varInst); !cptInst.end(); cptInst.incIn(varInst)) {
        cpt.set(cptInst, cpt[cptInst] / sum);
      }

      cptInst.unsetEnd();
    }
  }

Here is the call graph for this function:

Here is the caller graph for this function:

---

The documentation for this class was generated from the following files:

• agrum/BN/generator/simpleCPTGenerator.h
• agrum/BN/generator/simpleCPTGenerator_tpl.h