gum::SimpleCPTDisturber< GUM_SCALAR > Class Template Reference

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

#include <simpleCPTDisturber.h>

Inherits gum::ICPTDisturber< GUM_SCALAR >.

Public Member Functions
Constructors / Destructor
	SimpleCPTDisturber ()
	Default constructor. More...
	~SimpleCPTDisturber () override
	Destructor. More...
CPT disturbing methods
void	disturbReducCPT (NodeId node, BayesNet< GUM_SCALAR > &bayesNet, Potential< GUM_SCALAR > &src, Potential< GUM_SCALAR > &marg) override
	Disturb a CPT using GUM_SCALAR when removing parent varIdi. More...
void	disturbAugmCPT (NodeId node, BayesNet< GUM_SCALAR > &bayesNet, Potential< GUM_SCALAR > &src, GUM_SCALAR variation) override
	Disturb a CPT using GUM_SCALAR when inserting a new parent new_parent. More...

Detailed Description

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

<agrum/BN/generator/simpleCPTDisturber.h>

Class for disturbing Conditional Probability Tables.

This class implements a CPTGenerator CPT generation algorithm.

Definition at line 48 of file simpleCPTDisturber.h.

Constructor & Destructor Documentation

SimpleCPTDisturber()

template<typename GUM_SCALAR >

INLINE gum::SimpleCPTDisturber< GUM_SCALAR >::SimpleCPTDisturber

(

)

Default constructor.

Definition at line 35 of file simpleCPTDisturber_tpl.h.

                                                              :
      ICPTDisturber< GUM_SCALAR >() {
    GUM_CONSTRUCTOR(SimpleCPTDisturber);
  }

~SimpleCPTDisturber()

template<typename GUM_SCALAR >

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

override

Destructor.

Definition at line 42 of file simpleCPTDisturber_tpl.h.

                                                               {
    GUM_DESTRUCTOR(SimpleCPTDisturber);
  }

Member Function Documentation

disturbAugmCPT()

template<typename GUM_SCALAR >

void gum::SimpleCPTDisturber< GUM_SCALAR >::disturbAugmCPT ( NodeId  node, BayesNet< GUM_SCALAR > &  bayesNet, Potential< GUM_SCALAR > &  src, GUM_SCALAR  variation  )

override

Disturb a CPT using GUM_SCALAR when inserting a new parent new_parent.

Parameters

node	A reference on the CPT owner.
bayesNet	the Bayesian Network.
src	copy of the CPT before augmentation.
variation	degree of variation from the initial probability.

Definition at line 76 of file simpleCPTDisturber_tpl.h.

References gum::BayesNet< GUM_SCALAR >::cpt(), gum::MultiDimDecorator< GUM_SCALAR >::get(), and gum::randomProba().

                                         {
    Instantiation i(bayesNet.cpt(node));

    for (i.setFirst(); !i.end(); ++i)
      bayesNet.cpt(node).set(i,
                             src.get(i) + GUM_SCALAR(randomProba()) * variation);

    bayesNet.cpt(node).normalizeAsCPT();
  }

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disturbReducCPT()

template<typename GUM_SCALAR >

void gum::SimpleCPTDisturber< GUM_SCALAR >::disturbReducCPT ( NodeId  node, BayesNet< GUM_SCALAR > &  bayesNet, Potential< GUM_SCALAR > &  src, Potential< GUM_SCALAR > &  marg  )

override

Disturb a CPT using GUM_SCALAR when removing parent varIdi.

Parameters

node	The variable on the CPT owner.
bayesNet	the Bayesian Network.
src	copy of the CPT before reduction.
marg	of the inference before reduction on the node varIdi.

Definition at line 51 of file simpleCPTDisturber_tpl.h.

References gum::BayesNet< GUM_SCALAR >::cpt(), gum::MultiDimDecorator< GUM_SCALAR >::get(), and gum::Instantiation::setVals().

                                    {
    Instantiation i_src(src);
    Instantiation i_dest(bayesNet.cpt(node));
    Instantiation i_marg(marg);

    for (i_dest.setFirst(); !i_dest.end(); ++i_dest) {
      GUM_SCALAR potval = 0;

      i_src.setVals(i_dest);
      for (i_marg.setFirst(); !i_marg.end(); ++i_marg) {
        i_src.setVals(i_marg);
        potval += src.get(i_src) * marg.get(i_marg);
      }

      bayesNet.cpt(node).set(i_dest, potval);
    }

    bayesNet.cpt(node).normalizeAsCPT();
  }

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

• agrum/BN/generator/simpleCPTDisturber.h
• agrum/BN/generator/simpleCPTDisturber_tpl.h