gum::MarginalTargetedInference< GUM_SCALAR > Class Template Reference

<agrum/BN/inference/marginalTargetedInference.h> More...

#include <BayesNetInference.h>

Inheritance diagram for gum::MarginalTargetedInference< GUM_SCALAR >:

Collaboration diagram for gum::MarginalTargetedInference< GUM_SCALAR >:

Public Member Functions
Potential< GUM_SCALAR >	evidenceImpact (NodeId target, const NodeSet &evs)
	Create a gum::Potential for P(target|evs) (for all instanciation of target and evs) More...
Potential< GUM_SCALAR >	evidenceImpact (const std::string &target, const std::vector< std::string > &evs)
	Create a gum::Potential for P(target|evs) (for all instanciation of target and evs) More...
Constructors / Destructors
	MarginalTargetedInference (const IBayesNet< GUM_SCALAR > *bn)
	default constructor More...
virtual	~MarginalTargetedInference ()
	destructor More...
Probability computations
virtual const Potential< GUM_SCALAR > &	posterior (NodeId node)
	Computes and returns the posterior of a node. More...
virtual const Potential< GUM_SCALAR > &	posterior (const std::string &nodeName)
	Computes and returns the posterior of a node. More...
Targets
virtual void	eraseAllTargets ()
	Clear all previously defined targets. More...
virtual void	addAllTargets () final
	adds all nodes as targets More...
virtual void	addTarget (NodeId target) final
	Add a marginal target to the list of targets. More...
virtual void	addTarget (const std::string &nodeName) final
	Add a marginal target to the list of targets. More...
virtual void	eraseTarget (NodeId target) final
	removes an existing (marginal) target More...
virtual void	eraseTarget (const std::string &nodeName) final
	removes an existing (marginal) target More...
virtual bool	isTarget (NodeId node) const final
	return true if variable is a (marginal) target More...
virtual bool	isTarget (const std::string &nodeName) const final
	return true if variable is a (marginal) target More...
virtual const Size	nbrTargets () const noexcept final
	returns the number of marginal targets More...
virtual const NodeSet &	targets () const noexcept final
	returns the list of marginal targets More...
Information Theory related functions
virtual GUM_SCALAR	H (NodeId X) final
	Entropy Compute Shanon's entropy of a node given the observation. More...
virtual GUM_SCALAR	H (const std::string &nodeName) final
	Entropy Compute Shanon's entropy of a node given the observation. More...
Accessors / Modifiers
virtual void	setBN (const IBayesNet< GUM_SCALAR > *bn)
	assigns a new BN to the inference engine More...
virtual const IBayesNet< GUM_SCALAR > &	BN () const final
	Returns a constant reference over the IBayesNet referenced by this class. More...
virtual const NodeProperty< Size > &	domainSizes () const final
	get the domain sizes of the random variables of the BN More...
virtual bool	isInferenceReady () const noexcept final
	returns whether the inference object is in a ready state More...
virtual bool	isInferenceOutdatedBNStructure () const noexcept final
	returns whether the inference object is in a OutdatedBNStructure state More...
virtual bool	isInferenceOutdatedBNPotentials () const noexcept final
	returns whether the inference object is in a OutdatedBNPotential state More...
virtual bool	isInferenceDone () const noexcept final
	returns whether the inference object is in a InferenceDone state More...
virtual bool	isDone () const noexcept final
	returns whether the inference object is in a done state More...
virtual void	prepareInference () final
	prepare the internal inference structures for the next inference More...
virtual void	makeInference () final
	perform the heavy computations needed to compute the targets' posteriors More...
virtual void	clear ()
	clears all the data structures allocated for the last inference More...
virtual StateOfInference	state () const noexcept final
	returns the state of the inference engine More...
Evidence
virtual void	addEvidence (NodeId id, const Idx val) final
	adds a new hard evidence on node id More...
virtual void	addEvidence (const std::string &nodeName, const Idx val) final
	adds a new hard evidence on node named nodeName More...
virtual void	addEvidence (NodeId id, const std::string &label) final
	adds a new hard evidence on node id More...
virtual void	addEvidence (const std::string &nodeName, const std::string &label) final
	adds a new hard evidence on node named nodeName More...
virtual void	addEvidence (NodeId id, const std::vector< GUM_SCALAR > &vals) final
	adds a new evidence on node id (might be soft or hard) More...
virtual void	addEvidence (const std::string &nodeName, const std::vector< GUM_SCALAR > &vals) final
	adds a new evidence on node named nodeName (might be soft or hard) More...
virtual void	addEvidence (const Potential< GUM_SCALAR > &pot) final
	adds a new evidence on node id (might be soft or hard) More...
virtual void	addEvidence (Potential< GUM_SCALAR > &&pot) final
	adds a new evidence on node id (might be soft or hard) More...
virtual void	addSetOfEvidence (const Set< const Potential< GUM_SCALAR > * > &potset) final
	adds a new set of evidence More...
virtual void	addListOfEvidence (const List< const Potential< GUM_SCALAR > * > &potlist) final
	adds a new list of evidence More...
virtual void	chgEvidence (NodeId id, const Idx val) final
	change the value of an already existing hard evidence More...
virtual void	chgEvidence (const std::string &nodeName, const Idx val) final
	change the value of an already existing hard evidence More...
virtual void	chgEvidence (NodeId id, const std::string &label) final
	change the value of an already existing hard evidence More...
virtual void	chgEvidence (const std::string &nodeName, const std::string &label) final
	change the value of an already existing hard evidence More...
virtual void	chgEvidence (NodeId id, const std::vector< GUM_SCALAR > &vals) final
	change the value of an already existing evidence (might be soft or hard) More...
virtual void	chgEvidence (const std::string &nodeName, const std::vector< GUM_SCALAR > &vals) final
	change the value of an already existing evidence (might be soft or hard) More...
virtual void	chgEvidence (const Potential< GUM_SCALAR > &pot) final
	change the value of an already existing evidence (might be soft or hard) More...
virtual void	eraseAllEvidence () final
	removes all the evidence entered into the network More...
virtual void	eraseEvidence (NodeId id) final
	removed the evidence, if any, corresponding to node id More...
virtual void	eraseEvidence (const std::string &nodeName) final
	removed the evidence, if any, corresponding to node of name nodeName More...
virtual bool	hasEvidence () const final
	indicates whether some node(s) have received evidence More...
virtual bool	hasEvidence (NodeId id) const final
	indicates whether node id has received an evidence More...
virtual bool	hasEvidence (const std::string &nodeName) const final
	indicates whether node id has received an evidence More...
virtual bool	hasHardEvidence (NodeId id) const final
	indicates whether node id has received a hard evidence More...
virtual bool	hasHardEvidence (const std::string &nodeName) const final
	indicates whether node id has received a hard evidence More...
virtual bool	hasSoftEvidence (NodeId id) const final
	indicates whether node id has received a soft evidence More...
virtual bool	hasSoftEvidence (const std::string &nodeName) const final
	indicates whether node id has received a soft evidence More...
virtual Size	nbrEvidence () const final
	returns the number of evidence entered into the Bayesian network More...
virtual Size	nbrHardEvidence () const final
	returns the number of hard evidence entered into the Bayesian network More...
virtual Size	nbrSoftEvidence () const final
	returns the number of soft evidence entered into the Bayesian network More...
const NodeProperty< const Potential< GUM_SCALAR > *> &	evidence () const
	returns the set of evidence More...
const NodeSet &	softEvidenceNodes () const
	returns the set of nodes with soft evidence More...
const NodeSet &	hardEvidenceNodes () const
	returns the set of nodes with hard evidence More...
const NodeProperty< Idx > &	hardEvidence () const
	indicate for each node with hard evidence which value it took More...

Public Types
enum	StateOfInference { StateOfInference::OutdatedBNStructure, StateOfInference::OutdatedBNPotentials, StateOfInference::ReadyForInference, StateOfInference::Done }
	current state of the inference More...

Protected Member Functions
virtual void	_onMarginalTargetAdded (const NodeId id)=0
	fired after a new marginal target is inserted More...
virtual void	_onMarginalTargetErased (const NodeId id)=0
	fired before a marginal target is removed More...
virtual void	_onAllMarginalTargetsAdded ()=0
	fired after all the nodes of the BN are added as marginal targets More...
virtual void	_onAllMarginalTargetsErased ()=0
	fired before a all marginal targets are removed More...
virtual void	_onBayesNetChanged (const IBayesNet< GUM_SCALAR > *bn)
	fired after a new Bayes net has been assigned to the engine More...
virtual const Potential< GUM_SCALAR > &	_posterior (NodeId id)=0
	asks derived classes for the posterior of a given variable More...
void	_setTargetedMode ()
bool	_isTargetedMode () const
virtual void	_onStateChanged ()=0
	fired when the stage is changed More...
virtual void	_onEvidenceAdded (const NodeId id, bool isHardEvidence)=0
	fired after a new evidence is inserted More...
virtual void	_onEvidenceErased (const NodeId id, bool isHardEvidence)=0
	fired before an evidence is removed More...
virtual void	_onAllEvidenceErased (bool contains_hard_evidence)=0
	fired before all the evidence are erased More...
virtual void	_onEvidenceChanged (const NodeId id, bool hasChangedSoftHard)=0
	fired after an evidence is changed, in particular when its status (soft/hard) changes More...
virtual void	_updateOutdatedBNStructure ()=0
	prepares inference when the latter is in OutdatedBNStructure state More...
virtual void	_updateOutdatedBNPotentials ()=0
	prepares inference when the latter is in OutdatedBNPotentials state More...
virtual void	_makeInference ()=0
	called when the inference has to be performed effectively More...
void	_setOutdatedBNStructureState ()
	put the inference into an outdated BN structure state More...
void	_setOutdatedBNPotentialsState ()
	puts the inference into an OutdatedBNPotentials state if it is not already in an OutdatedBNStructure state More...

Detailed Description

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

<agrum/BN/inference/marginalTargetedInference.h>

A generic class for the computation of (possibly incrementally) marginal posteriors

The goal of this class is to take care of the marginal targets used for computing marginal posteriors. The MarginalTargetedInference class inherits from Inference that takes care of handling both evidence and the current state of the inference. Note that the MarginalTargetedInference is designed to be used in incremental inference engines.

Definition at line 69 of file BayesNetInference.h.

Member Enumeration Documentation

StateOfInference

template<typename GUM_SCALAR >

enum gum::BayesNetInference::StateOfInference

stronginherited

current state of the inference

BayesNetInference can be in one of 4 different states:

• OutdatedBNStructure: in this state, the inference is fully unprepared to be applied because some events changed the "logical" structure of the BN: for instance a node received a hard evidence, which implies that its outgoing arcs can be removed from the BN, hence involving a structural change in the BN. As a consequence, the (incremental) inference (probably) needs a significant amount of preparation to be ready for the next inference. In a Lazy propagation, for instance, this step amounts to compute a new join tree, hence a new structure in which inference will be applied. Note that classes that inherit from BayesNetInference may be smarter than BayesNetInference and may, in some situations, find out that their data structures are still ok for inference and, therefore, only resort to perform the actions related to the OutdatedBNPotentials state. As an example, consider a LazyPropagation inference in Bayes Net A->B->C->D->E in which C has received hard evidence e_C and E is the only target. In this case, A and B are not needed for inference, the only potentials that matter are P(D|e_C) and P(E|D). So the smallest join tree needed for inference contains only one clique DE. Now, adding new evidence e_A on A has no impact on E given hard evidence e_C. In this case, LazyPropagation can be smart and not update its join tree.
• OutdatedBNPotentials: in this state, the structure of the BN remains unchanged, only some potentials stored in it have changed. Therefore, the inference probably just needs to invalidate some already computed potentials to be ready. Only a light amount of preparation is needed to be able to perform inference.
• Ready4Inference: in this state, all the data structures are ready for inference. There just remains to perform the inference computations.
• Done: the heavy computations of inference have been done. There might still remain a few light computations to perform to get the posterior potentials we need. Typically, in Lazy Propagation, all the messages in the join tree have been computed but, to get the potentials, we still need to perform the combinations of the potentials in the cliques with the messages sent to the cliques. In some inference algorithms, this step may even be empty.

Enumerator
OutdatedBNStructure
OutdatedBNPotentials
ReadyForInference
Done

Definition at line 183 of file BayesNetInference.h.

                                {
      OutdatedBNStructure,
      OutdatedBNPotentials,
      ReadyForInference,
      Done
    };

Constructor & Destructor Documentation

MarginalTargetedInference()

template<typename GUM_SCALAR >

gum::MarginalTargetedInference< GUM_SCALAR >::MarginalTargetedInference ( const IBayesNet< GUM_SCALAR > *  bn )

explicit

default constructor

Warning

By default, all the nodes of the Bayes net are targets.

note that, by aGrUM's rule, the BN is not copied but only referenced by the inference algorithm.

Definition at line 35 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::BayesNetInference< GUM_SCALAR >::__setBayesNetDuringConstruction(), gum::MarginalTargetedInference< GUM_SCALAR >::__targeted_mode, gum::MarginalTargetedInference< GUM_SCALAR >::__targets, and gum::DAGmodel::dag().

                                        :
      BayesNetInference< GUM_SCALAR >(bn) {
    // assign a BN if this has not been done before (due to virtual inheritance)
    if (this->__bn == nullptr) {
      BayesNetInference< GUM_SCALAR >::__setBayesNetDuringConstruction(bn);
    }

    // sets all the nodes as targets
    if (bn != nullptr) {
      __targeted_mode = false;
      __targets = bn->dag().asNodeSet();
    }

    GUM_CONSTRUCTOR(MarginalTargetedInference);
  }

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~MarginalTargetedInference()

template<typename GUM_SCALAR >

gum::MarginalTargetedInference< GUM_SCALAR >::~MarginalTargetedInference ( )

virtual

destructor

Definition at line 55 of file marginalTargetedInference_tpl.h.

                                                                      {
    GUM_DESTRUCTOR(MarginalTargetedInference);
  }

Member Function Documentation

__setAllMarginalTargets()

template<typename GUM_SCALAR >

void gum::MarginalTargetedInference< GUM_SCALAR >::__setAllMarginalTargets ( )

private

sets all the nodes of the Bayes net as targets

Definition at line 226 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::MarginalTargetedInference< GUM_SCALAR >::__targets, gum::MarginalTargetedInference< GUM_SCALAR >::_onAllMarginalTargetsAdded(), and gum::Set< Key, Alloc >::clear().

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::_onBayesNetChanged().

                                                                        {
    __targets.clear();
    if (this->__bn != nullptr) {
      __targets = this->__bn->dag().asNodeSet();
      _onAllMarginalTargetsAdded();
    }
  }

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_isTargetedMode()

template<typename GUM_SCALAR >

INLINE bool gum::MarginalTargetedInference< GUM_SCALAR >::_isTargetedMode ( ) const

protected

Definition at line 338 of file marginalTargetedInference_tpl.h.

References gum::MarginalTargetedInference< GUM_SCALAR >::__targeted_mode.

                                                                             {
    return __targeted_mode;
  }

_makeInference()

template<typename GUM_SCALAR >

virtual void gum::BayesNetInference< GUM_SCALAR >::_makeInference ( )

protectedpure virtualinherited

called when the inference has to be performed effectively

Once the inference is done, _fillPosterior can be called.

Implemented in gum::LazyPropagation< GUM_SCALAR >, gum::SamplingInference< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::BayesNetInference< GUM_SCALAR >::makeInference().

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_onAllEvidenceErased()

template<typename GUM_SCALAR >

virtual void gum::BayesNetInference< GUM_SCALAR >::_onAllEvidenceErased ( bool  contains_hard_evidence )

protectedpure virtualinherited

fired before all the evidence are erased

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::BayesNetInference< GUM_SCALAR >::eraseAllEvidence().

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_onAllMarginalTargetsAdded()

template<typename GUM_SCALAR>

virtual void gum::MarginalTargetedInference< GUM_SCALAR >::_onAllMarginalTargetsAdded ( )

protectedpure virtual

fired after all the nodes of the BN are added as marginal targets

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::__setAllMarginalTargets().

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_onAllMarginalTargetsErased()

template<typename GUM_SCALAR>

virtual void gum::MarginalTargetedInference< GUM_SCALAR >::_onAllMarginalTargetsErased ( )

protectedpure virtual

fired before a all marginal targets are removed

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::eraseAllTargets().

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_onBayesNetChanged()

template<typename GUM_SCALAR >

void gum::MarginalTargetedInference< GUM_SCALAR >::_onBayesNetChanged ( const IBayesNet< GUM_SCALAR > *  bn )

protectedvirtual

fired after a new Bayes net has been assigned to the engine

Implements gum::BayesNetInference< GUM_SCALAR >.

Reimplemented in gum::JointTargetedInference< GUM_SCALAR >, gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Definition at line 62 of file marginalTargetedInference_tpl.h.

References gum::MarginalTargetedInference< GUM_SCALAR >::__setAllMarginalTargets(), and gum::MarginalTargetedInference< GUM_SCALAR >::__targeted_mode.

Referenced by gum::JointTargetedInference< GUM_SCALAR >::_onBayesNetChanged().

                                        {
    __targeted_mode = true;
    __setAllMarginalTargets();
  }

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_onEvidenceAdded()

template<typename GUM_SCALAR >

virtual void gum::BayesNetInference< GUM_SCALAR >::_onEvidenceAdded ( const NodeId  id, bool  isHardEvidence  )

protectedpure virtualinherited

fired after a new evidence is inserted

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::BayesNetInference< GUM_SCALAR >::addEvidence().

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_onEvidenceChanged()

template<typename GUM_SCALAR >

virtual void gum::BayesNetInference< GUM_SCALAR >::_onEvidenceChanged ( const NodeId  id, bool  hasChangedSoftHard  )

protectedpure virtualinherited

fired after an evidence is changed, in particular when its status (soft/hard) changes

Parameters

nodeId	the node of the changed evidence
hasChangedSoftHard	true if the evidence has changed from Soft to Hard or from Hard to Soft

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::BayesNetInference< GUM_SCALAR >::chgEvidence().

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_onEvidenceErased()

template<typename GUM_SCALAR >

virtual void gum::BayesNetInference< GUM_SCALAR >::_onEvidenceErased ( const NodeId  id, bool  isHardEvidence  )

protectedpure virtualinherited

fired before an evidence is removed

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::BayesNetInference< GUM_SCALAR >::eraseEvidence().

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_onMarginalTargetAdded()

template<typename GUM_SCALAR>

virtual void gum::MarginalTargetedInference< GUM_SCALAR >::_onMarginalTargetAdded ( const NodeId  id )

protectedpure virtual

fired after a new marginal target is inserted

Parameters

id	The target variable's id.

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::addAllTargets(), and gum::MarginalTargetedInference< GUM_SCALAR >::addTarget().

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_onMarginalTargetErased()

template<typename GUM_SCALAR>

virtual void gum::MarginalTargetedInference< GUM_SCALAR >::_onMarginalTargetErased ( const NodeId  id )

protectedpure virtual

fired before a marginal target is removed

Parameters

id	The target variable's id.

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::eraseTarget().

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_onStateChanged()

template<typename GUM_SCALAR >

virtual void gum::BayesNetInference< GUM_SCALAR >::_onStateChanged ( )

protectedpure virtualinherited

fired when the stage is changed

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::BayesNetInference< GUM_SCALAR >::__setState().

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_posterior()

template<typename GUM_SCALAR>

virtual const Potential< GUM_SCALAR >& gum::MarginalTargetedInference< GUM_SCALAR >::_posterior ( NodeId  id )

protectedpure virtual

asks derived classes for the posterior of a given variable

Parameters

id	The variable's id.

Implemented in gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, gum::SamplingInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::posterior().

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_setOutdatedBNPotentialsState()

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::_setOutdatedBNPotentialsState ( )

protectedinherited

puts the inference into an OutdatedBNPotentials state if it is not already in an OutdatedBNStructure state

OutdatedBNPotentials: in this state, the structure of the BN remains unchanged, only some potentials stored in it have changed. Therefore, the inference probably just needs to invalidate some already computed potentials to be ready. Only a light amount of preparation is needed to be able to perform inference.

Definition at line 685 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__setState(), and gum::BayesNetInference< GUM_SCALAR >::OutdatedBNPotentials.

                                                                             {
    __setState(StateOfInference::OutdatedBNPotentials);
  }

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_setOutdatedBNStructureState()

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::_setOutdatedBNStructureState ( )

protectedinherited

put the inference into an outdated BN structure state

OutdatedBNStructure: in this state, the inference is fully unprepared to be applied because some events changed the "logical" structure of the BN: for instance a node received a hard evidence, which implies that its outgoing arcs can be removed from the BN, hence involving a structural change in the BN. As a consequence, the (incremental) inference (probably) needs a significant amount of preparation to be ready for the next inference. In a Lazy propagation, for instance, this step amounts to compute a new join tree, hence a new structure in which inference will be applied. Note that classes that inherit from BayesNetInference may be smarter than BayesNetInference and may, in some situations, find out that their data structures are still ok for inference and, therefore, only resort to perform the actions related to the OutdatedBNPotentials state. As an example, consider a LazyPropagation inference in Bayes Net A->B->C->D->E in which C has received hard evidence e_C and E is the only target. In this case, A and B are not needed for inference, the only potentials that matter are P(D|e_C) and P(E|D). So the smallest join tree needed for inference contains only one clique DE. Now, adding new evidence e_A on A has no impact on E given hard evidence e_C. In this case, LazyPropagation can be smart and not update its join tree.

Definition at line 677 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__setState(), and gum::BayesNetInference< GUM_SCALAR >::OutdatedBNStructure.

                                                                            {
    __setState(StateOfInference::OutdatedBNStructure);
  }

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_setTargetedMode()

template<typename GUM_SCALAR >

INLINE void gum::MarginalTargetedInference< GUM_SCALAR >::_setTargetedMode ( )

protected

Definition at line 342 of file marginalTargetedInference_tpl.h.

References gum::MarginalTargetedInference< GUM_SCALAR >::__targeted_mode, gum::MarginalTargetedInference< GUM_SCALAR >::__targets, and gum::Set< Key, Alloc >::clear().

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::addAllTargets(), gum::JointTargetedInference< GUM_SCALAR >::addJointTarget(), gum::MarginalTargetedInference< GUM_SCALAR >::addTarget(), and gum::MarginalTargetedInference< GUM_SCALAR >::eraseAllTargets().

                                                                        {
    if (!__targeted_mode) {
      __targets.clear();
      __targeted_mode = true;
    }
  }

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_updateOutdatedBNPotentials()

template<typename GUM_SCALAR >

virtual void gum::BayesNetInference< GUM_SCALAR >::_updateOutdatedBNPotentials ( )

protectedpure virtualinherited

prepares inference when the latter is in OutdatedBNPotentials state

Note that the values of evidence are not necessarily known and can be changed between _updateOutdatedBNPotentials and _makeInference.

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::BayesNetInference< GUM_SCALAR >::prepareInference().

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_updateOutdatedBNStructure()

template<typename GUM_SCALAR >

virtual void gum::BayesNetInference< GUM_SCALAR >::_updateOutdatedBNStructure ( )

protectedpure virtualinherited

prepares inference when the latter is in OutdatedBNStructure state

Note that the values of evidence are not necessarily known and can be changed between _updateOutdatedBNStructure and _makeInference.

Implemented in gum::SamplingInference< GUM_SCALAR >, gum::LazyPropagation< GUM_SCALAR >, gum::VariableElimination< GUM_SCALAR >, gum::ShaferShenoyInference< GUM_SCALAR >, and gum::LoopyBeliefPropagation< GUM_SCALAR >.

Referenced by gum::BayesNetInference< GUM_SCALAR >::prepareInference().

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addAllTargets()

template<typename GUM_SCALAR >

void gum::MarginalTargetedInference< GUM_SCALAR >::addAllTargets ( )

finalvirtual

adds all nodes as targets

Definition at line 136 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::MarginalTargetedInference< GUM_SCALAR >::__targets, gum::MarginalTargetedInference< GUM_SCALAR >::_onMarginalTargetAdded(), gum::MarginalTargetedInference< GUM_SCALAR >::_setTargetedMode(), gum::Set< Key, Alloc >::contains(), GUM_ERROR, and gum::Set< Key, Alloc >::insert().

                                                              {
    // check if the node belongs to the Bayesian network
    if (this->__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");


    _setTargetedMode();   // does nothing if already in targeted mode
    for (const auto target : this->__bn->dag()) {
      if (!__targets.contains(target)) {
        __targets.insert(target);
        _onMarginalTargetAdded(target);
        this->__setState(
           BayesNetInference< GUM_SCALAR >::StateOfInference::OutdatedBNStructure);
      }
    }
  }

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addEvidence() [1/8]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::addEvidence ( NodeId  id, const Idx  val  )

finalvirtualinherited

adds a new hard evidence on node id

Exceptions

UndefinedElement	if id does not belong to the Bayesian network
InvalidArgument	if val is not a value for id
InvalidArgument	if id already has an evidence

Definition at line 247 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__createHardEvidence().

Referenced by gum::LoopySamplingInference< GUM_SCALAR, APPROX >::_makeInference(), gum::BayesNetInference< GUM_SCALAR >::addEvidence(), gum::BayesNetInference< GUM_SCALAR >::addListOfEvidence(), gum::BayesNetInference< GUM_SCALAR >::addSetOfEvidence(), gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact(), and gum::JointTargetedInference< GUM_SCALAR >::evidenceJointImpact().

                                                                          {
    addEvidence(__createHardEvidence(id, val));
  }

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addEvidence() [2/8]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::addEvidence ( const std::string &  nodeName, const Idx  val  )

finalvirtualinherited

adds a new hard evidence on node named nodeName

Exceptions

UndefinedElement	if nodeName does not belong to the Bayesian network
InvalidArgument	if val is not a value for id
InvalidArgument	if nodeName already has an evidence

Definition at line 255 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::addEvidence(), and gum::BayesNetInference< GUM_SCALAR >::BN().

                                                                          {
    addEvidence(this->BN().idFromName(nodeName), val);
  }

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addEvidence() [3/8]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::addEvidence ( NodeId  id, const std::string &  label  )

finalvirtualinherited

adds a new hard evidence on node id

Exceptions

UndefinedElement	if id does not belong to the Bayesian network
InvalidArgument	if val is not a value for id
InvalidArgument	if id already has an evidence

Definition at line 263 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::addEvidence(), and gum::BayesNetInference< GUM_SCALAR >::BN().

                                                                          {
    addEvidence(id, this->BN().variable(id)[label]);
  }

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addEvidence() [4/8]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::addEvidence ( const std::string &  nodeName, const std::string &  label  )

finalvirtualinherited

adds a new hard evidence on node named nodeName

Exceptions

UndefinedElement	if nodeName does not belong to the Bayesian network
InvalidArgument	if val is not a value for id
InvalidArgument	if nodeName already has an evidence

Definition at line 271 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::addEvidence(), and gum::BayesNetInference< GUM_SCALAR >::BN().

                                                                          {
    NodeId id = this->BN().idFromName(nodeName);
    addEvidence(id, this->BN().variable(id)[label]);
  }

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addEvidence() [5/8]

template<typename GUM_SCALAR >

void gum::BayesNetInference< GUM_SCALAR >::addEvidence ( NodeId  id, const std::vector< GUM_SCALAR > &  vals  )

finalvirtualinherited

adds a new evidence on node id (might be soft or hard)

Exceptions

UndefinedElement	if id does not belong to the Bayesian network
InvalidArgument	if id already has an evidence
FatalError	if vals=[0,0,...,0]
InvalidArgument	if the size of vals is different from the domain size of node id

Definition at line 279 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::MultiDimDecorator< GUM_SCALAR >::add(), gum::BayesNetInference< GUM_SCALAR >::addEvidence(), and GUM_ERROR.

                                                     {
    // checks that the evidence is meaningful
    if (__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");

    if (!__bn->dag().exists(id)) {
      GUM_ERROR(UndefinedElement, id << " is not a NodeId in the bn");
    }

    if (__bn->variable(id).domainSize() != vals.size()) {
      GUM_ERROR(InvalidArgument,
                "node " << __bn->variable(id)
                        << " and its evidence vector have different sizes.");
    }

    Potential< GUM_SCALAR > pot;
    pot.add(__bn->variable(id));
    pot.fillWith(vals);
    addEvidence(std::move(pot));
  }

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addEvidence() [6/8]

template<typename GUM_SCALAR >

void gum::BayesNetInference< GUM_SCALAR >::addEvidence ( const std::string &  nodeName, const std::vector< GUM_SCALAR > &  vals  )

finalvirtualinherited

adds a new evidence on node named nodeName (might be soft or hard)

Exceptions

UndefinedElement	if id does not belong to the Bayesian network
InvalidArgument	if nodeName already has an evidence
FatalError	if vals=[0,0,...,0]
InvalidArgument	if the size of vals is different from the domain size of node nodeName

Definition at line 305 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::addEvidence(), and gum::BayesNetInference< GUM_SCALAR >::BN().

                                                                     {
    addEvidence(this->BN().idFromName(nodeName), vals);
  }

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addEvidence() [7/8]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::addEvidence ( const Potential< GUM_SCALAR > &  pot )

finalvirtualinherited

adds a new evidence on node id (might be soft or hard)

Exceptions

UndefinedElement	if the potential is defined over several nodes
UndefinedElement	if the node on which the potential is defined does not belong to the Bayesian network
InvalidArgument	if the node of the potential already has an evidence
FatalError	if pot=[0,0,...,0]

Definition at line 354 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::addEvidence().

                                         {
    Potential< GUM_SCALAR > new_pot(pot);
    addEvidence(std::move(new_pot));
  }

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addEvidence() [8/8]

template<typename GUM_SCALAR >

void gum::BayesNetInference< GUM_SCALAR >::addEvidence ( Potential< GUM_SCALAR > &&  pot )

finalvirtualinherited

adds a new evidence on node id (might be soft or hard)

Exceptions

UndefinedElement	if the potential is defined over several nodes
UndefinedElement	if the node on which the potential is defined does not belong to the Bayesian network
InvalidArgument	if the node of the potential already has an evidence
FatalError	if pot=[0,0,...,0]

Definition at line 313 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::BayesNetInference< GUM_SCALAR >::__evidence, gum::BayesNetInference< GUM_SCALAR >::__hard_evidence, gum::BayesNetInference< GUM_SCALAR >::__hard_evidence_nodes, gum::BayesNetInference< GUM_SCALAR >::__isHardEvidence(), gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::BayesNetInference< GUM_SCALAR >::__soft_evidence_nodes, gum::BayesNetInference< GUM_SCALAR >::_onEvidenceAdded(), GUM_ERROR, gum::BayesNetInference< GUM_SCALAR >::hasEvidence(), gum::Set< Key, Alloc >::insert(), and gum::BayesNetInference< GUM_SCALAR >::OutdatedBNStructure.

                                                                               {
    // check if the potential corresponds to an evidence
    if (pot.nbrDim() != 1) {
      GUM_ERROR(InvalidArgument, pot << " is not mono-dimensional.");
    }
    if (__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");

    NodeId id = __bn->nodeId(pot.variable(0));

    if (hasEvidence(id)) {
      GUM_ERROR(InvalidArgument,
                " node " << id
                         << " already has an evidence. Please use chgEvidence().");
    }

    // check whether we have a hard evidence (and also check whether the
    // potential only contains 0 (in this case, this will automatically raise
    // an exception) )
    Idx  val;
    bool is_hard_evidence = __isHardEvidence(pot, val);

    // insert the evidence
    __evidence.insert(
       id,
       new Potential< GUM_SCALAR >(std::forward< Potential< GUM_SCALAR > >(pot)));
    if (is_hard_evidence) {   // pot is deterministic
      __hard_evidence.insert(id, val);
      __hard_evidence_nodes.insert(id);
    } else {
      __soft_evidence_nodes.insert(id);
    }
    __setState(StateOfInference::OutdatedBNStructure);
    _onEvidenceAdded(id, is_hard_evidence);
  }

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addListOfEvidence()

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::addListOfEvidence ( const List< const Potential< GUM_SCALAR > * > &  potlist )

finalvirtualinherited

adds a new list of evidence

Exceptions

UndefinedElement	if some potential is defined over several nodes
UndefinedElement	if the node on which some potential is defined does not belong to the Bayesian network
InvalidArgument	if the node of some potential already has an evidence
FatalError	if pot=[0,0,...,0]

Definition at line 363 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::addEvidence().

                                                            {
    for (const auto pot : potlist)
      addEvidence(*pot);
  }

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addSetOfEvidence()

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::addSetOfEvidence ( const Set< const Potential< GUM_SCALAR > * > &  potset )

finalvirtualinherited

adds a new set of evidence

Exceptions

UndefinedElement	if some potential is defined over several nodes
UndefinedElement	if the node on which some potential is defined does not belong to the Bayesian network
InvalidArgument	if the node of some potential already has an evidence
FatalError	if pot=[0,0,...,0]

Definition at line 372 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::addEvidence().

                                                          {
    for (const auto pot : potset)
      addEvidence(*pot);
  }

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addTarget() [1/2]

template<typename GUM_SCALAR >

void gum::MarginalTargetedInference< GUM_SCALAR >::addTarget ( NodeId  target )

finalvirtual

Add a marginal target to the list of targets.

Exceptions

UndefinedElement

if target is not a NodeId in the Bayes net

Definition at line 112 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::MarginalTargetedInference< GUM_SCALAR >::__targets, gum::MarginalTargetedInference< GUM_SCALAR >::_onMarginalTargetAdded(), gum::MarginalTargetedInference< GUM_SCALAR >::_setTargetedMode(), gum::Set< Key, Alloc >::contains(), GUM_ERROR, and gum::Set< Key, Alloc >::insert().

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::addTarget(), and gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact().

                                                                       {
    // check if the node belongs to the Bayesian network
    if (this->__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");

    if (!this->__bn->dag().exists(target)) {
      GUM_ERROR(UndefinedElement, target << " is not a NodeId in the bn");
    }

    _setTargetedMode();   // does nothing if already in targeted mode
    // add the new target
    if (!__targets.contains(target)) {
      __targets.insert(target);
      _onMarginalTargetAdded(target);
      this->__setState(
         BayesNetInference< GUM_SCALAR >::StateOfInference::OutdatedBNStructure);
    }
  }

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addTarget() [2/2]

template<typename GUM_SCALAR >

void gum::MarginalTargetedInference< GUM_SCALAR >::addTarget ( const std::string &  nodeName )

finalvirtual

Add a marginal target to the list of targets.

Exceptions

UndefinedElement

if target is not a NodeId in the Bayes net

Definition at line 158 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::MarginalTargetedInference< GUM_SCALAR >::addTarget(), and GUM_ERROR.

                                {
    // check if the node belongs to the Bayesian network
    if (this->__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");

    addTarget(this->__bn->idFromName(nodeName));
  }

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BN()

template<typename GUM_SCALAR >

INLINE const IBayesNet< GUM_SCALAR > & gum::BayesNetInference< GUM_SCALAR >::BN ( ) const

finalvirtualinherited

Returns a constant reference over the IBayesNet referenced by this class.

Exceptions

UndefinedElement

is raised if no Bayes net has been assigned to the inference.

Definition at line 121 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, and GUM_ERROR.

Referenced by gum::WeightedSampling< GUM_SCALAR >::_draw(), gum::MonteCarloSampling< GUM_SCALAR >::_draw(), gum::ImportanceSampling< GUM_SCALAR >::_draw(), gum::SamplingInference< GUM_SCALAR >::_posterior(), gum::BayesNetInference< GUM_SCALAR >::addEvidence(), gum::BayesNetInference< GUM_SCALAR >::chgEvidence(), gum::SamplingInference< GUM_SCALAR >::contextualize(), gum::SamplingInference< GUM_SCALAR >::currentPosterior(), gum::BayesNetInference< GUM_SCALAR >::eraseEvidence(), gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact(), gum::JointTargetedInference< GUM_SCALAR >::evidenceJointImpact(), gum::MarginalTargetedInference< GUM_SCALAR >::H(), gum::BayesNetInference< GUM_SCALAR >::hasEvidence(), gum::BayesNetInference< GUM_SCALAR >::hasHardEvidence(), gum::BayesNetInference< GUM_SCALAR >::hasSoftEvidence(), gum::JointTargetedInference< GUM_SCALAR >::I(), gum::JointTargetedInference< GUM_SCALAR >::jointMutualInformation(), gum::MarginalTargetedInference< GUM_SCALAR >::posterior(), gum::JointTargetedInference< GUM_SCALAR >::posterior(), gum::SamplingInference< GUM_SCALAR >::samplingBN(), and gum::Estimator< GUM_SCALAR >::setFromLBP().

                                                         {
    if (__bn == nullptr)
      GUM_ERROR(UndefinedElement,
                "No Bayes net has been assigned to "
                "the inference algorithm.");
    return *__bn;
  }

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chgEvidence() [1/7]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::chgEvidence ( NodeId  id, const Idx  val  )

finalvirtualinherited

change the value of an already existing hard evidence

Exceptions

UndefinedElement	if id does not belong to the Bayesian network
InvalidArgument	if val is not a value for id
InvalidArgument	if id does not already have an evidence

Definition at line 432 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__createHardEvidence().

Referenced by gum::BayesNetInference< GUM_SCALAR >::chgEvidence(), gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact(), and gum::JointTargetedInference< GUM_SCALAR >::evidenceJointImpact().

                                                                          {
    chgEvidence(__createHardEvidence(id, val));
  }

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chgEvidence() [2/7]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::chgEvidence ( const std::string &  nodeName, const Idx  val  )

finalvirtualinherited

change the value of an already existing hard evidence

Exceptions

UndefinedElement	if nodeName does not belong to the Bayesian network
InvalidArgument	if val is not a value for id
InvalidArgument	if id does not already have an evidence

Definition at line 440 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::BayesNetInference< GUM_SCALAR >::chgEvidence().

                                                                          {
    chgEvidence(this->BN().idFromName(nodeName), val);
  }

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chgEvidence() [3/7]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::chgEvidence ( NodeId  id, const std::string &  label  )

finalvirtualinherited

change the value of an already existing hard evidence

Exceptions

UndefinedElement	if id does not belong to the Bayesian network
InvalidArgument	if val is not a value for id
InvalidArgument	if id does not already have an evidence

Definition at line 448 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::BayesNetInference< GUM_SCALAR >::chgEvidence().

                                                                          {
    chgEvidence(id, this->BN().variable(id)[label]);
  }

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chgEvidence() [4/7]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::chgEvidence ( const std::string &  nodeName, const std::string &  label  )

finalvirtualinherited

change the value of an already existing hard evidence

Exceptions

UndefinedElement	if nodeName does not belong to the Bayesian network
InvalidArgument	if val is not a value for id
InvalidArgument	if id does not already have an evidence

Definition at line 456 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::BayesNetInference< GUM_SCALAR >::chgEvidence().

                                                                          {
    NodeId id = this->BN().idFromName(nodeName);
    chgEvidence(id, this->BN().variable(id)[label]);
  }

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chgEvidence() [5/7]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::chgEvidence ( NodeId  id, const std::vector< GUM_SCALAR > &  vals  )

finalvirtualinherited

change the value of an already existing evidence (might be soft or hard)

Exceptions

UndefinedElement	if id does not belong to the Bayesian network
InvalidArgument	if the node does not already have an evidence
FatalError	if vals=[0,0,...,0]
InvalidArgument	if the size of vals is different from the domain size of node id

Definition at line 464 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::MultiDimDecorator< GUM_SCALAR >::add(), gum::BayesNetInference< GUM_SCALAR >::chgEvidence(), and GUM_ERROR.

                                                     {
    // check whether this corresponds to an evidence
    if (__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");

    if (!__bn->dag().exists(id)) {
      GUM_ERROR(UndefinedElement, id << " is not a NodeId in the bn");
    }

    if (__bn->variable(id).domainSize() != vals.size()) {
      GUM_ERROR(InvalidArgument,
                "node " << __bn->variable(id)
                        << " and its evidence have different sizes.");
    }

    // create the potential corresponding to vals
    Potential< GUM_SCALAR > pot;
    pot.add(__bn->variable(id));
    pot.fillWith(vals);
    chgEvidence(pot);
  }

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chgEvidence() [6/7]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::chgEvidence ( const std::string &  nodeName, const std::vector< GUM_SCALAR > &  vals  )

finalvirtualinherited

change the value of an already existing evidence (might be soft or hard)

Exceptions

UndefinedElement	if nodeName does not belong to the Bayesian network
InvalidArgument	if the node does not already have an evidence
FatalError	if vals=[0,0,...,0]
InvalidArgument	if the size of vals is different from the domain size of node id

Definition at line 491 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::BayesNetInference< GUM_SCALAR >::chgEvidence().

                                                                     {
    chgEvidence(this->BN().idFromName(nodeName), vals);
  }

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chgEvidence() [7/7]

template<typename GUM_SCALAR >

void gum::BayesNetInference< GUM_SCALAR >::chgEvidence ( const Potential< GUM_SCALAR > &  pot )

finalvirtualinherited

change the value of an already existing evidence (might be soft or hard)

Exceptions

UndefinedElement	if the potential is defined over several nodes
UndefinedElement	if the node on which the potential is defined does not belong to the Bayesian network
InvalidArgument	if the node of the potential does not already have an evidence
FatalError	if pot=[0,0,...,0]

Definition at line 499 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::BayesNetInference< GUM_SCALAR >::__evidence, gum::BayesNetInference< GUM_SCALAR >::__hard_evidence, gum::BayesNetInference< GUM_SCALAR >::__hard_evidence_nodes, gum::BayesNetInference< GUM_SCALAR >::__isHardEvidence(), gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::BayesNetInference< GUM_SCALAR >::__soft_evidence_nodes, gum::BayesNetInference< GUM_SCALAR >::_onEvidenceChanged(), gum::Instantiation::end(), gum::Set< Key, Alloc >::erase(), GUM_ERROR, gum::BayesNetInference< GUM_SCALAR >::hasEvidence(), gum::BayesNetInference< GUM_SCALAR >::hasHardEvidence(), gum::Instantiation::inc(), gum::Set< Key, Alloc >::insert(), gum::BayesNetInference< GUM_SCALAR >::isInferenceOutdatedBNStructure(), gum::MultiDimDecorator< GUM_SCALAR >::nbrDim(), gum::BayesNetInference< GUM_SCALAR >::OutdatedBNPotentials, gum::BayesNetInference< GUM_SCALAR >::OutdatedBNStructure, gum::MultiDimDecorator< GUM_SCALAR >::set(), gum::Instantiation::setFirst(), and gum::MultiDimDecorator< GUM_SCALAR >::variable().

                                         {
    // check if the potential corresponds to an evidence
    if (pot.nbrDim() != 1) {
      GUM_ERROR(InvalidArgument, pot << " is not a mono-dimensional potential.");
    }
    if (__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");

    NodeId id = __bn->nodeId(pot.variable(0));

    if (!hasEvidence(id)) {
      GUM_ERROR(InvalidArgument,
                id << " has no evidence. Please use addEvidence().");
    }

    // check whether we have a hard evidence (and also check whether the
    // potential only contains 0 (in this case, this will automatically raise
    // an exception) )
    Idx  val;
    bool is_hard_evidence = __isHardEvidence(pot, val);

    // modify the evidence already stored
    const Potential< GUM_SCALAR >* localPot = __evidence[id];
    Instantiation                  I(pot);
    for (I.setFirst(); !I.end(); I.inc()) {
      localPot->set(I, pot[I]);
    }

    // the inference state will be different
    // whether evidence change from Hard to Soft or not.
    bool hasChangedSoftHard = false;

    if (is_hard_evidence) {
      if (!hasHardEvidence(id)) {
        hasChangedSoftHard = true;
        __hard_evidence.insert(id, val);
        __hard_evidence_nodes.insert(id);
        __soft_evidence_nodes.erase(id);
      } else {
        __hard_evidence[id] = val;
      }
    } else {
      if (hasHardEvidence(id)) {   // evidence was hard
        __hard_evidence.erase(id);
        __hard_evidence_nodes.erase(id);
        __soft_evidence_nodes.insert(id);
        hasChangedSoftHard = true;
      }
    }

    if (hasChangedSoftHard) {
      __setState(StateOfInference::OutdatedBNStructure);
    } else {
      if (!isInferenceOutdatedBNStructure()) {
        __setState(StateOfInference::OutdatedBNPotentials);
      }
    }

    _onEvidenceChanged(id, hasChangedSoftHard);
  }

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clear()

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::clear ( )

virtualinherited

clears all the data structures allocated for the last inference

Definition at line 153 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::BayesNetInference< GUM_SCALAR >::eraseAllEvidence(), and gum::BayesNetInference< GUM_SCALAR >::OutdatedBNStructure.

Referenced by gum::BayesNetInference< GUM_SCALAR >::setBN().

                                                     {
    eraseAllEvidence();
    __setState(StateOfInference::OutdatedBNStructure);
  }

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domainSizes()

template<typename GUM_SCALAR >

INLINE const NodeProperty< Size > & gum::BayesNetInference< GUM_SCALAR >::domainSizes ( ) const

finalvirtualinherited

get the domain sizes of the random variables of the BN

Definition at line 174 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__domain_sizes.

                                                                  {
    return __domain_sizes;
  }

eraseAllEvidence()

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::eraseAllEvidence ( )

finalvirtualinherited

removes all the evidence entered into the network

Definition at line 595 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__evidence, gum::BayesNetInference< GUM_SCALAR >::__hard_evidence, gum::BayesNetInference< GUM_SCALAR >::__hard_evidence_nodes, gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::BayesNetInference< GUM_SCALAR >::__soft_evidence_nodes, gum::BayesNetInference< GUM_SCALAR >::_onAllEvidenceErased(), gum::Set< Key, Alloc >::clear(), gum::BayesNetInference< GUM_SCALAR >::isInferenceOutdatedBNStructure(), gum::BayesNetInference< GUM_SCALAR >::OutdatedBNPotentials, and gum::BayesNetInference< GUM_SCALAR >::OutdatedBNStructure.

Referenced by gum::BayesNetInference< GUM_SCALAR >::clear(), gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact(), gum::JointTargetedInference< GUM_SCALAR >::evidenceJointImpact(), and gum::JointTargetedInference< GUM_SCALAR >::jointMutualInformation().

                                                                {
    bool has_hard_evidence = !__hard_evidence.empty();
    this->_onAllEvidenceErased(has_hard_evidence);

    for (const auto& pair : __evidence) {
      if (pair.second != nullptr) { delete (pair.second); }
    }

    __evidence.clear();
    __hard_evidence.clear();
    __hard_evidence_nodes.clear();
    __soft_evidence_nodes.clear();

    if (has_hard_evidence) {
      __setState(StateOfInference::OutdatedBNStructure);
    } else {
      if (!isInferenceOutdatedBNStructure()) {
        __setState(StateOfInference::OutdatedBNPotentials);
      }
    }
  }

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eraseAllTargets()

template<typename GUM_SCALAR >

INLINE void gum::MarginalTargetedInference< GUM_SCALAR >::eraseAllTargets ( )

virtual

Clear all previously defined targets.

Reimplemented in gum::JointTargetedInference< GUM_SCALAR >.

Definition at line 99 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::MarginalTargetedInference< GUM_SCALAR >::__targets, gum::MarginalTargetedInference< GUM_SCALAR >::_onAllMarginalTargetsErased(), gum::MarginalTargetedInference< GUM_SCALAR >::_setTargetedMode(), and gum::Set< Key, Alloc >::clear().

Referenced by gum::JointTargetedInference< GUM_SCALAR >::eraseAllMarginalTargets(), and gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact().

                                                                       {
    _onAllMarginalTargetsErased();

    __targets.clear();
    _setTargetedMode();   // does nothing if already in targeted mode

    this->__setState(
       BayesNetInference< GUM_SCALAR >::StateOfInference::OutdatedBNStructure);
  }

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eraseEvidence() [1/2]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::eraseEvidence ( NodeId  id )

finalvirtualinherited

removed the evidence, if any, corresponding to node id

Definition at line 566 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__evidence, gum::BayesNetInference< GUM_SCALAR >::__hard_evidence, gum::BayesNetInference< GUM_SCALAR >::__hard_evidence_nodes, gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::BayesNetInference< GUM_SCALAR >::__soft_evidence_nodes, gum::BayesNetInference< GUM_SCALAR >::_onEvidenceErased(), gum::Set< Key, Alloc >::erase(), gum::BayesNetInference< GUM_SCALAR >::hasEvidence(), gum::BayesNetInference< GUM_SCALAR >::hasHardEvidence(), gum::BayesNetInference< GUM_SCALAR >::isInferenceOutdatedBNStructure(), gum::BayesNetInference< GUM_SCALAR >::OutdatedBNPotentials, and gum::BayesNetInference< GUM_SCALAR >::OutdatedBNStructure.

Referenced by gum::BayesNetInference< GUM_SCALAR >::eraseEvidence().

                                                                      {
    if (hasEvidence(id)) {
      if (hasHardEvidence(id)) {
        _onEvidenceErased(id, true);
        __hard_evidence.erase(id);
        __hard_evidence_nodes.erase(id);
        __setState(StateOfInference::OutdatedBNStructure);
      } else {
        _onEvidenceErased(id, false);
        __soft_evidence_nodes.erase(id);
        if (!isInferenceOutdatedBNStructure()) {
          __setState(StateOfInference::OutdatedBNPotentials);
        }
      }

      delete (__evidence[id]);
      __evidence.erase(id);
    }
  }

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eraseEvidence() [2/2]

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::eraseEvidence ( const std::string &  nodeName )

finalvirtualinherited

removed the evidence, if any, corresponding to node of name nodeName

Definition at line 588 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::BayesNetInference< GUM_SCALAR >::eraseEvidence().

                                                                             {
    eraseEvidence(this->BN().idFromName(nodeName));
  }

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eraseTarget() [1/2]

template<typename GUM_SCALAR >

void gum::MarginalTargetedInference< GUM_SCALAR >::eraseTarget ( NodeId  target )

finalvirtual

removes an existing (marginal) target

Warning

If the target does not already exist, the method does nothing. In particular, it does not raise any exception.

Definition at line 172 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::MarginalTargetedInference< GUM_SCALAR >::__targeted_mode, gum::MarginalTargetedInference< GUM_SCALAR >::__targets, gum::MarginalTargetedInference< GUM_SCALAR >::_onMarginalTargetErased(), gum::Set< Key, Alloc >::contains(), gum::Set< Key, Alloc >::erase(), and GUM_ERROR.

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::eraseTarget().

                                                                         {
    // check if the node belongs to the Bayesian network
    if (this->__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");

    if (!this->__bn->dag().exists(target)) {
      GUM_ERROR(UndefinedElement, target << " is not a NodeId in the bn");
    }


    if (__targets.contains(target)) {
      __targeted_mode = true;   // we do not use _setTargetedMode because we do not
                                // want to clear the targets
      _onMarginalTargetErased(target);
      __targets.erase(target);
      this->__setState(
         BayesNetInference< GUM_SCALAR >::StateOfInference::OutdatedBNStructure);
    }
  }

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eraseTarget() [2/2]

template<typename GUM_SCALAR >

void gum::MarginalTargetedInference< GUM_SCALAR >::eraseTarget ( const std::string &  nodeName )

finalvirtual

removes an existing (marginal) target

Warning

If the target does not already exist, the method does nothing. In particular, it does not raise any exception.

Definition at line 197 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::MarginalTargetedInference< GUM_SCALAR >::eraseTarget(), and GUM_ERROR.

                                {
    // check if the node belongs to the Bayesian network
    if (this->__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");

    eraseTarget(this->__bn->idFromName(nodeName));
  }

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evidence()

template<typename GUM_SCALAR >

INLINE const NodeProperty< const Potential< GUM_SCALAR > *> & gum::BayesNetInference< GUM_SCALAR >::evidence ( ) const

inherited

returns the set of evidence

Definition at line 650 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__evidence.

Referenced by gum::ImportanceSampling< GUM_SCALAR >::_onContextualize(), and gum::MarginalTargetedInference< GUM_SCALAR >::posterior().

                                                               {
    return __evidence;
  }

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evidenceImpact() [1/2]

template<typename GUM_SCALAR >

Potential< GUM_SCALAR > gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact	(	NodeId	target,
		const NodeSet &	evs
	)

Create a gum::Potential for P(target|evs) (for all instanciation of target and evs)

Warning

If some evs are d-separated, they are not included in the Potential

Parameters

bn	the BayesNet
target	the nodeId of the targetted variable
evs	the vector of nodeId of the observed variables

Returns

a Potential

Definition at line 285 of file marginalTargetedInference_tpl.h.

References gum::MultiDimDecorator< GUM_SCALAR >::add(), gum::BayesNetInference< GUM_SCALAR >::addEvidence(), gum::MarginalTargetedInference< GUM_SCALAR >::addTarget(), gum::BayesNetInference< GUM_SCALAR >::BN(), gum::BayesNetInference< GUM_SCALAR >::chgEvidence(), gum::Set< Key, Alloc >::contains(), gum::Instantiation::end(), gum::BayesNetInference< GUM_SCALAR >::eraseAllEvidence(), gum::MarginalTargetedInference< GUM_SCALAR >::eraseAllTargets(), GUM_ERROR, gum::Instantiation::incNotVar(), gum::Instantiation::incVar(), gum::BayesNetInference< GUM_SCALAR >::makeInference(), gum::MarginalTargetedInference< GUM_SCALAR >::posterior(), gum::MultiDimDecorator< GUM_SCALAR >::set(), gum::Instantiation::setFirst(), gum::Instantiation::setFirstVar(), and gum::Instantiation::val().

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact().

                                                                                 {
    const auto& vtarget = this->BN().variable(target);

    if (evs.contains(target)) {
      GUM_ERROR(InvalidArgument,
                "Target <" << vtarget.name() << "> (" << target
                           << ") can not be in evs (" << evs << ").");
    }
    auto condset = this->BN().minimalCondSet(target, evs);

    Potential< GUM_SCALAR > res;
    this->eraseAllTargets();
    this->eraseAllEvidence();
    res.add(this->BN().variable(target));
    this->addTarget(target);
    for (const auto& n : condset) {
      res.add(this->BN().variable(n));
      this->addEvidence(n, 0);
    }

    Instantiation inst(res);
    for (inst.setFirst(); !inst.end(); inst.incNotVar(vtarget)) {
      // inferring
      for (const auto& n : condset)
        this->chgEvidence(n, inst.val(this->BN().variable(n)));
      this->makeInference();
      // populate res
      for (inst.setFirstVar(vtarget); !inst.end(); inst.incVar(vtarget)) {
        res.set(inst, this->posterior(target)[inst]);
      }
      inst.setFirstVar(vtarget);   // remove inst.end() flag
    }

    return res;
  }

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evidenceImpact() [2/2]

template<typename GUM_SCALAR >

Potential< GUM_SCALAR > gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact	(	const std::string &	target,
		const std::vector< std::string > &	evs
	)

Create a gum::Potential for P(target|evs) (for all instanciation of target and evs)

Warning

If some evs are d-separated, they are not included in the Potential

Parameters

target	the nodeId of the target variable
evs	the nodeId of the observed variable

Returns

a Potential

Definition at line 324 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact(), and gum::Set< Key, Alloc >::insert().

                                                                 {
    const auto& bn = this->BN();

    gum::NodeSet evsId;
    for (const auto& evname : evs) {
      evsId.insert(bn.idFromName(evname));
    }

    return evidenceImpact(bn.idFromName(target), evsId);
  }

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H() [1/2]

template<typename GUM_SCALAR >

INLINE GUM_SCALAR gum::MarginalTargetedInference< GUM_SCALAR >::H ( NodeId  X )

finalvirtual

Entropy Compute Shanon's entropy of a node given the observation.

See also

http://en.wikipedia.org/wiki/Information_entropy

Definition at line 269 of file marginalTargetedInference_tpl.h.

References gum::MarginalTargetedInference< GUM_SCALAR >::posterior().

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::H(), and gum::JointTargetedInference< GUM_SCALAR >::VI().

                                                                       {
    return posterior(X).entropy();
  }

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H() [2/2]

template<typename GUM_SCALAR >

INLINE GUM_SCALAR gum::MarginalTargetedInference< GUM_SCALAR >::H ( const std::string &  nodeName )

finalvirtual

Entropy Compute Shanon's entropy of a node given the observation.

See also

http://en.wikipedia.org/wiki/Information_entropy

Definition at line 278 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::MarginalTargetedInference< GUM_SCALAR >::H().

                                                                             {
    return H(this->BN().idFromName(nodeName));
  }

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hardEvidence()

template<typename GUM_SCALAR >

INLINE const NodeProperty< Idx > & gum::BayesNetInference< GUM_SCALAR >::hardEvidence ( ) const

inherited

indicate for each node with hard evidence which value it took

Definition at line 642 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__hard_evidence.

Referenced by gum::WeightedSampling< GUM_SCALAR >::_draw(), gum::MonteCarloSampling< GUM_SCALAR >::_draw(), gum::ImportanceSampling< GUM_SCALAR >::_draw(), and gum::SamplingInference< GUM_SCALAR >::contextualize().

                                                                   {
    return __hard_evidence;
  }

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hardEvidenceNodes()

template<typename GUM_SCALAR >

INLINE const NodeSet & gum::BayesNetInference< GUM_SCALAR >::hardEvidenceNodes ( ) const

inherited

returns the set of nodes with hard evidence

the set of nodes that received hard evidence

Definition at line 666 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__hard_evidence_nodes.

Referenced by gum::WeightedSampling< GUM_SCALAR >::_draw(), gum::MonteCarloSampling< GUM_SCALAR >::_draw(), gum::ImportanceSampling< GUM_SCALAR >::_draw(), gum::ImportanceSampling< GUM_SCALAR >::_onContextualize(), gum::SamplingInference< GUM_SCALAR >::_setEstimatorFromBN(), gum::SamplingInference< GUM_SCALAR >::_setEstimatorFromLBP(), gum::SamplingInference< GUM_SCALAR >::contextualize(), and gum::MarginalTargetedInference< GUM_SCALAR >::posterior().

                                                                        {
    return __hard_evidence_nodes;
  }

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hasEvidence() [1/3]

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::hasEvidence ( ) const

finalvirtualinherited

indicates whether some node(s) have received evidence

Definition at line 381 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__evidence.

Referenced by gum::BayesNetInference< GUM_SCALAR >::addEvidence(), gum::BayesNetInference< GUM_SCALAR >::chgEvidence(), gum::BayesNetInference< GUM_SCALAR >::eraseEvidence(), and gum::BayesNetInference< GUM_SCALAR >::hasEvidence().

                                                                 {
    return !__evidence.empty();
  }

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hasEvidence() [2/3]

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::hasEvidence ( NodeId  id ) const

finalvirtualinherited

indicates whether node id has received an evidence

Definition at line 388 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__evidence.

                                                                          {
    return __evidence.exists(id);
  }

hasEvidence() [3/3]

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::hasEvidence ( const std::string &  nodeName ) const

finalvirtualinherited

indicates whether node id has received an evidence

Definition at line 409 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::BayesNetInference< GUM_SCALAR >::hasEvidence().

                                      {
    return hasEvidence(this->BN().idFromName(nodeName));
  }

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hasHardEvidence() [1/2]

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::hasHardEvidence ( NodeId  id ) const

finalvirtualinherited

indicates whether node id has received a hard evidence

Definition at line 395 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__hard_evidence_nodes, and gum::Set< Key, Alloc >::exists().

Referenced by gum::ImportanceSampling< GUM_SCALAR >::_draw(), gum::BayesNetInference< GUM_SCALAR >::chgEvidence(), gum::BayesNetInference< GUM_SCALAR >::eraseEvidence(), and gum::BayesNetInference< GUM_SCALAR >::hasHardEvidence().

                                                                              {
    return __hard_evidence_nodes.exists(id);
  }

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hasHardEvidence() [2/2]

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::hasHardEvidence ( const std::string &  nodeName ) const

finalvirtualinherited

indicates whether node id has received a hard evidence

Definition at line 417 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::BayesNetInference< GUM_SCALAR >::hasHardEvidence().

                                      {
    return hasHardEvidence(this->BN().idFromName(nodeName));
  }

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hasSoftEvidence() [1/2]

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::hasSoftEvidence ( NodeId  id ) const

finalvirtualinherited

indicates whether node id has received a soft evidence

Definition at line 402 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__soft_evidence_nodes, and gum::Set< Key, Alloc >::exists().

Referenced by gum::BayesNetInference< GUM_SCALAR >::hasSoftEvidence().

                                                                              {
    return __soft_evidence_nodes.exists(id);
  }

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hasSoftEvidence() [2/2]

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::hasSoftEvidence ( const std::string &  nodeName ) const

finalvirtualinherited

indicates whether node id has received a soft evidence

Definition at line 425 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::BayesNetInference< GUM_SCALAR >::hasSoftEvidence().

                                      {
    return hasSoftEvidence(this->BN().idFromName(nodeName));
  }

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isDone()

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::isDone ( ) const

finalvirtualnoexceptinherited

returns whether the inference object is in a done state

The inference object is in a done state when the posteriors can be retrieved without performing a new inference, i.e., all the heavy computations have already been performed. Typically, in a junction tree algorithm, this corresponds to a situation in which all the messages needed in the JT have been computed and sent.

Definition at line 96 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__state, and gum::BayesNetInference< GUM_SCALAR >::Done.

Referenced by gum::JointTargetedInference< GUM_SCALAR >::jointPosterior(), gum::BayesNetInference< GUM_SCALAR >::makeInference(), gum::MarginalTargetedInference< GUM_SCALAR >::posterior(), and gum::BayesNetInference< GUM_SCALAR >::prepareInference().

                                                                     {
    return (__state == StateOfInference::Done);
  }

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isInferenceDone()

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::isInferenceDone ( ) const

finalvirtualnoexceptinherited

returns whether the inference object is in a InferenceDone state

Definition at line 89 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__state, and gum::BayesNetInference< GUM_SCALAR >::Done.

                                                                              {
    return (__state == StateOfInference::Done);
  }

isInferenceOutdatedBNPotentials()

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::isInferenceOutdatedBNPotentials ( ) const

finalvirtualnoexceptinherited

returns whether the inference object is in a OutdatedBNPotential state

Definition at line 83 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__state, and gum::BayesNetInference< GUM_SCALAR >::OutdatedBNPotentials.

              {
    return (__state == StateOfInference::OutdatedBNPotentials);
  }

isInferenceOutdatedBNStructure()

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::isInferenceOutdatedBNStructure ( ) const

finalvirtualnoexceptinherited

returns whether the inference object is in a OutdatedBNStructure state

Definition at line 76 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__state, and gum::BayesNetInference< GUM_SCALAR >::OutdatedBNStructure.

Referenced by gum::BayesNetInference< GUM_SCALAR >::chgEvidence(), gum::BayesNetInference< GUM_SCALAR >::eraseAllEvidence(), and gum::BayesNetInference< GUM_SCALAR >::eraseEvidence().

              {
    return (__state == StateOfInference::OutdatedBNStructure);
  }

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isInferenceReady()

template<typename GUM_SCALAR >

INLINE bool gum::BayesNetInference< GUM_SCALAR >::isInferenceReady ( ) const

finalvirtualnoexceptinherited

returns whether the inference object is in a ready state

Definition at line 70 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__state, and gum::BayesNetInference< GUM_SCALAR >::ReadyForInference.

Referenced by gum::SamplingInference< GUM_SCALAR >::_onStateChanged(), gum::BayesNetInference< GUM_SCALAR >::makeInference(), and gum::BayesNetInference< GUM_SCALAR >::prepareInference().

                                                                               {
    return (__state == StateOfInference::ReadyForInference);
  }

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isTarget() [1/2]

template<typename GUM_SCALAR >

INLINE bool gum::MarginalTargetedInference< GUM_SCALAR >::isTarget ( NodeId  node ) const

finalvirtual

return true if variable is a (marginal) target

Definition at line 76 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::MarginalTargetedInference< GUM_SCALAR >::__targets, gum::Set< Key, Alloc >::contains(), and GUM_ERROR.

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::isTarget(), gum::MarginalTargetedInference< GUM_SCALAR >::posterior(), and gum::JointTargetedInference< GUM_SCALAR >::posterior().

                                                                        {
    // check that the variable belongs to the bn
    if (this->__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");
    if (!this->__bn->dag().exists(node)) {
      GUM_ERROR(UndefinedElement, node << " is not a NodeId in the bn");
    }

    return __targets.contains(node);
  }

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isTarget() [2/2]

template<typename GUM_SCALAR >

INLINE bool gum::MarginalTargetedInference< GUM_SCALAR >::isTarget ( const std::string &  nodeName ) const

finalvirtual

return true if variable is a (marginal) target

Definition at line 91 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, and gum::MarginalTargetedInference< GUM_SCALAR >::isTarget().

                                      {
    return isTarget(this->__bn->idFromName(nodeName));
  }

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makeInference()

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::makeInference ( )

finalvirtualinherited

perform the heavy computations needed to compute the targets' posteriors

In a Junction tree propagation scheme, for instance, the heavy computations are those of the messages sent in the JT. This is precisely what makeInference should compute. Later, the computations of the posteriors can be done "lightly" by multiplying and projecting those messages.

Definition at line 711 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::BayesNetInference< GUM_SCALAR >::_makeInference(), gum::BayesNetInference< GUM_SCALAR >::Done, gum::BayesNetInference< GUM_SCALAR >::isDone(), gum::BayesNetInference< GUM_SCALAR >::isInferenceReady(), and gum::BayesNetInference< GUM_SCALAR >::prepareInference().

Referenced by gum::LoopySamplingInference< GUM_SCALAR, APPROX >::_makeInference(), gum::MCBayesNetGenerator< GUM_SCALAR, ICPTGenerator, ICPTDisturber >::disturbBN(), gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact(), gum::JointTargetedInference< GUM_SCALAR >::evidenceJointImpact(), gum::JointTargetedInference< GUM_SCALAR >::jointMutualInformation(), gum::JointTargetedInference< GUM_SCALAR >::jointPosterior(), and gum::MarginalTargetedInference< GUM_SCALAR >::posterior().

                                                             {
    if (isDone()) { return; }

    if (!isInferenceReady()) { prepareInference(); }

    _makeInference();

    __setState(StateOfInference::Done);
  }

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nbrEvidence()

template<typename GUM_SCALAR >

INLINE Size gum::BayesNetInference< GUM_SCALAR >::nbrEvidence ( ) const

finalvirtualinherited

returns the number of evidence entered into the Bayesian network

Definition at line 620 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__evidence.

                                                                 {
    return __evidence.size();
  }

nbrHardEvidence()

template<typename GUM_SCALAR >

INLINE Size gum::BayesNetInference< GUM_SCALAR >::nbrHardEvidence ( ) const

finalvirtualinherited

returns the number of hard evidence entered into the Bayesian network

Definition at line 627 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__hard_evidence_nodes, and gum::Set< Key, Alloc >::size().

                                                                     {
    return __hard_evidence_nodes.size();
  }

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nbrSoftEvidence()

template<typename GUM_SCALAR >

INLINE Size gum::BayesNetInference< GUM_SCALAR >::nbrSoftEvidence ( ) const

finalvirtualinherited

returns the number of soft evidence entered into the Bayesian network

Definition at line 634 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__soft_evidence_nodes, and gum::Set< Key, Alloc >::size().

                                                                     {
    return __soft_evidence_nodes.size();
  }

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nbrTargets()

template<typename GUM_SCALAR >

INLINE const Size gum::MarginalTargetedInference< GUM_SCALAR >::nbrTargets ( ) const

finalvirtualnoexcept

returns the number of marginal targets

Definition at line 218 of file marginalTargetedInference_tpl.h.

References gum::MarginalTargetedInference< GUM_SCALAR >::__targets, and gum::Set< Key, Alloc >::size().

              {
    return __targets.size();
  }

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posterior() [1/2]

template<typename GUM_SCALAR >

const Potential< GUM_SCALAR > & gum::MarginalTargetedInference< GUM_SCALAR >::posterior ( NodeId  node )

virtual

Computes and returns the posterior of a node.

Returns

a const ref to the posterior probability of the node.

Parameters

node	the node for which we need a posterior probability

Warning

for efficiency reasons, the potential is stored into the inference engine and is returned by reference. In order to ensure that the potential may still exist even if the Inference object is destroyed, the user has to copy it explicitly.

prepareInference and makeInference may be applied if needed by the posterior method.

Exceptions

UndefinedElement

if node is not in the set of targets

Reimplemented in gum::JointTargetedInference< GUM_SCALAR >.

Definition at line 242 of file marginalTargetedInference_tpl.h.

References gum::MarginalTargetedInference< GUM_SCALAR >::_posterior(), gum::BayesNetInference< GUM_SCALAR >::evidence(), GUM_ERROR, gum::BayesNetInference< GUM_SCALAR >::hardEvidenceNodes(), gum::BayesNetInference< GUM_SCALAR >::isDone(), gum::MarginalTargetedInference< GUM_SCALAR >::isTarget(), and gum::BayesNetInference< GUM_SCALAR >::makeInference().

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::evidenceImpact(), gum::MarginalTargetedInference< GUM_SCALAR >::H(), gum::JointTargetedInference< GUM_SCALAR >::posterior(), gum::MarginalTargetedInference< GUM_SCALAR >::posterior(), and gum::Estimator< GUM_SCALAR >::setFromLBP().

                                                                   {
    if (this->hardEvidenceNodes().contains(node)) {
      return *(this->evidence()[node]);
    }

    if (!isTarget(node)) {
      // throws UndefinedElement if var is not a target
      GUM_ERROR(UndefinedElement, node << " is not a target node");
    }

    if (!this->isDone()) { this->makeInference(); }

    return _posterior(node);
  }

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posterior() [2/2]

template<typename GUM_SCALAR >

const Potential< GUM_SCALAR > & gum::MarginalTargetedInference< GUM_SCALAR >::posterior ( const std::string &  nodeName )

virtual

Computes and returns the posterior of a node.

Returns

a const ref to the posterior probability of the node.

Parameters

nodeName

the anme of the node for which we need a posterior probability

Warning

for efficiency reasons, the potential is stored into the inference engine and is returned by reference. In order to ensure that the potential may still exist even if the Inference object is destroyed, the user has to copy it explicitly.

prepareInference and makeInference may be applied if needed by the posterior method.

Exceptions

UndefinedElement

if node is not in the set of targets

Reimplemented in gum::JointTargetedInference< GUM_SCALAR >.

Definition at line 260 of file marginalTargetedInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::BN(), and gum::MarginalTargetedInference< GUM_SCALAR >::posterior().

                                   {
    return posterior(this->BN().idFromName(nodeName));
  }

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prepareInference()

template<typename GUM_SCALAR >

INLINE void gum::BayesNetInference< GUM_SCALAR >::prepareInference ( )

finalvirtualinherited

prepare the internal inference structures for the next inference

Definition at line 692 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::BayesNetInference< GUM_SCALAR >::__state, gum::BayesNetInference< GUM_SCALAR >::_updateOutdatedBNPotentials(), gum::BayesNetInference< GUM_SCALAR >::_updateOutdatedBNStructure(), GUM_ERROR, gum::BayesNetInference< GUM_SCALAR >::isDone(), gum::BayesNetInference< GUM_SCALAR >::isInferenceReady(), gum::BayesNetInference< GUM_SCALAR >::OutdatedBNStructure, and gum::BayesNetInference< GUM_SCALAR >::ReadyForInference.

Referenced by gum::BayesNetInference< GUM_SCALAR >::makeInference(), and gum::SamplingInference< GUM_SCALAR >::samplingBN().

                                                                {
    if (isInferenceReady() || isDone()) { return; }

    if (__bn == nullptr)
      GUM_ERROR(NullElement,
                "No Bayes net has been assigned to the "
                "inference algorithm");

    if (__state == StateOfInference::OutdatedBNStructure)
      _updateOutdatedBNStructure();
    else
      _updateOutdatedBNPotentials();

    __setState(StateOfInference::ReadyForInference);
  }

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setBN()

template<typename GUM_SCALAR >

void gum::BayesNetInference< GUM_SCALAR >::setBN ( const IBayesNet< GUM_SCALAR > *  bn )

virtualinherited

assigns a new BN to the inference engine

Assigns a new BN to the BayesNetInference engine and sends messages to the descendants of BayesNetInference to inform them that the BN has changed.

Warning

By default, all the nodes of the Bayes net are targets.

note that, by aGrUM's rule, the bn is not copied into the inference engine but only referenced.

Definition at line 132 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__bn, gum::BayesNetInference< GUM_SCALAR >::__computeDomainSizes(), gum::BayesNetInference< GUM_SCALAR >::__setState(), gum::BayesNetInference< GUM_SCALAR >::_onBayesNetChanged(), gum::BayesNetInference< GUM_SCALAR >::clear(), and gum::BayesNetInference< GUM_SCALAR >::OutdatedBNStructure.

                                                                               {
    clear();
    __bn = bn;
    __computeDomainSizes();
    _onBayesNetChanged(bn);
    __setState(StateOfInference::OutdatedBNStructure);
  }

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softEvidenceNodes()

template<typename GUM_SCALAR >

INLINE const NodeSet & gum::BayesNetInference< GUM_SCALAR >::softEvidenceNodes ( ) const

inherited

returns the set of nodes with soft evidence

the set of nodes that received soft evidence

Definition at line 658 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__soft_evidence_nodes.

Referenced by gum::SamplingInference< GUM_SCALAR >::contextualize().

                                                                        {
    return __soft_evidence_nodes;
  }

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state()

template<typename GUM_SCALAR >

INLINE BayesNetInference< GUM_SCALAR >::StateOfInference gum::BayesNetInference< GUM_SCALAR >::state ( ) const

finalvirtualnoexceptinherited

returns the state of the inference engine

Definition at line 104 of file BayesNetInference_tpl.h.

References gum::BayesNetInference< GUM_SCALAR >::__state.

Referenced by gum::BayesNetInference< GUM_SCALAR >::__setState().

                                                           {
    return __state;
  }

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targets()

template<typename GUM_SCALAR >

INLINE const NodeSet & gum::MarginalTargetedInference< GUM_SCALAR >::targets ( ) const

finalvirtualnoexcept

returns the list of marginal targets

Definition at line 211 of file marginalTargetedInference_tpl.h.

References gum::MarginalTargetedInference< GUM_SCALAR >::__targets.

Referenced by gum::SamplingInference< GUM_SCALAR >::contextualize().

              {
    return __targets;
  }

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Member Data Documentation

__targeted_mode

template<typename GUM_SCALAR>

bool gum::MarginalTargetedInference< GUM_SCALAR >::__targeted_mode

private

whether the actual targets are default

Definition at line 241 of file marginalTargetedInference.h.

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::_isTargetedMode(), gum::MarginalTargetedInference< GUM_SCALAR >::_onBayesNetChanged(), gum::MarginalTargetedInference< GUM_SCALAR >::_setTargetedMode(), gum::MarginalTargetedInference< GUM_SCALAR >::eraseTarget(), and gum::MarginalTargetedInference< GUM_SCALAR >::MarginalTargetedInference().

__targets

template<typename GUM_SCALAR>

NodeSet gum::MarginalTargetedInference< GUM_SCALAR >::__targets

private

the set of marginal targets

Definition at line 244 of file marginalTargetedInference.h.

Referenced by gum::MarginalTargetedInference< GUM_SCALAR >::__setAllMarginalTargets(), gum::MarginalTargetedInference< GUM_SCALAR >::_setTargetedMode(), gum::MarginalTargetedInference< GUM_SCALAR >::addAllTargets(), gum::MarginalTargetedInference< GUM_SCALAR >::addTarget(), gum::MarginalTargetedInference< GUM_SCALAR >::eraseAllTargets(), gum::MarginalTargetedInference< GUM_SCALAR >::eraseTarget(), gum::MarginalTargetedInference< GUM_SCALAR >::isTarget(), gum::MarginalTargetedInference< GUM_SCALAR >::MarginalTargetedInference(), gum::MarginalTargetedInference< GUM_SCALAR >::nbrTargets(), and gum::MarginalTargetedInference< GUM_SCALAR >::targets().

---

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

• agrum/BN/inference/tools/BayesNetInference.h
• agrum/BN/inference/tools/marginalTargetedInference.h
• agrum/BN/inference/tools/marginalTargetedInference_tpl.h