gum::SimpleCPTDisturber< GUM_SCALAR > Class Template Reference

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

#include <simpleCPTDisturber.h>

Inheritance diagram for gum::SimpleCPTDisturber< GUM_SCALAR >:

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

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 68 of file simpleCPTDisturber.h.

Constructor & Destructor Documentation

SimpleCPTDisturber()

template<typename GUM_SCALAR>

INLINE gum::SimpleCPTDisturber< GUM_SCALAR >::SimpleCPTDisturber

(

)

Default constructor.

Definition at line 55 of file simpleCPTDisturber_tpl.h.

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

References SimpleCPTDisturber().

Referenced by SimpleCPTDisturber(), and ~SimpleCPTDisturber().

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~SimpleCPTDisturber()

template<typename GUM_SCALAR>

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

override

Destructor.

Definition at line 61 of file simpleCPTDisturber_tpl.h.

                                                               {
    GUM_DESTRUCTOR(SimpleCPTDisturber);
  }

References SimpleCPTDisturber().

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Member Function Documentation

disturbAugmCPT()

template<typename GUM_SCALAR>

void gum::SimpleCPTDisturber< GUM_SCALAR >::disturbAugmCPT ( NodeId node, BayesNet< GUM_SCALAR > & bayesNet, Tensor< 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 94 of file simpleCPTDisturber_tpl.h.

                                                                                           {
    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();
  }

disturbReducCPT()

template<typename GUM_SCALAR>

void gum::SimpleCPTDisturber< GUM_SCALAR >::disturbReducCPT ( NodeId node, BayesNet< GUM_SCALAR > & bayesNet, Tensor< GUM_SCALAR > & src, Tensor< 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 70 of file simpleCPTDisturber_tpl.h.

                                                                                       {
    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();
  }

References gum::Instantiation::end(), gum::Instantiation::setFirst(), and gum::Instantiation::setVals().

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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