gum::learning::StructuralConstraintIndegree Class Reference

the class for structural constraints limiting the number of parents of nodes in a directed graph More...

#include <structuralConstraintIndegree.h>

Inheritance diagram for gum::learning::StructuralConstraintIndegree:

Collaboration diagram for gum::learning::StructuralConstraintIndegree:

Public Member Functions
Constructors / Destructors
	StructuralConstraintIndegree ()
	default constructor More...
	StructuralConstraintIndegree (Size nb_nodes, Size max_indegree)
	constructor starting with an empty graph with a given number of nodes More...
	StructuralConstraintIndegree (const DiGraph &graph, Size max_indegree)
	constructor starting with a given graph More...
	StructuralConstraintIndegree (const StructuralConstraintIndegree &from)
	copy constructor More...
	StructuralConstraintIndegree (StructuralConstraintIndegree &&from)
	move constructor More...
virtual	~StructuralConstraintIndegree ()
	destructor More...
Operators
StructuralConstraintIndegree &	operator= (const StructuralConstraintIndegree &from)
	copy operator More...
StructuralConstraintIndegree &	operator= (StructuralConstraintIndegree &&from)
	move operator More...
Specific Accessors / Modifiers
void	setIndegree (const NodeProperty< Size > &max_indegree)
	sets the default max indegree for all the nodes in the property More...
void	setMaxIndegree (Size max_indegree, bool update_all_node=false)
	resets the default max indegree and possibly updates the indegree of all nodes More...
void	setGraphAlone (const DiGraph &graph)
	sets a new graph from which we will perform checkings More...
void	modifyGraphAlone (const ArcAddition &change)
	notify the constraint of a modification of the graph More...
void	modifyGraphAlone (const ArcDeletion &change)
	notify the constraint of a modification of the graph More...
void	modifyGraphAlone (const ArcReversal &change)
	notify the constraint of a modification of the graph More...
void	modifyGraphAlone (const GraphChange &change)
	notify the constraint of a modification of the graph More...
bool	isAlwaysInvalidAlone (const GraphChange &change) const
	indicates whether a change will always violate the constraint More...
bool	checkArcAdditionAlone (NodeId x, NodeId y) const
	checks whether the constraints enable to add arc (x,y) More...
bool	checkArcDeletionAlone (NodeId x, NodeId y) const
	checks whether the constraints enable to remove arc (x,y) More...
bool	checkArcReversalAlone (NodeId x, NodeId y) const
	checks whether the constraints enable to reverse arc (x,y) More...
bool	checkModificationAlone (const ArcAddition &change) const
	checks whether the constraints enable to add an arc More...
bool	checkModificationAlone (const ArcDeletion &change) const
	checks whether the constraints enable to remove an arc More...
bool	checkModificationAlone (const ArcReversal &change) const
	checks whether the constraints enable to reverse an arc More...
bool	checkModificationAlone (const GraphChange &change) const
	checks whether the constraints enable to perform a graph change More...

Protected Attributes
NodeProperty< Size >	Indegree__max_parents_
	the max number of parents per node More...
Size	Indegree__max_indegree_ {std::numeric_limits< Size >::max()}
	a default max indegree to assign for nodes without specified indegree More...

Protected Member Functions
Accessors / Modifiers
void	setGraph (const DiGraph &graph)
	sets a new graph from which we will perform checkings More...
void	modifyGraph (const ArcAddition &change)
	notify the constraint of a modification of the graph More...
void	modifyGraph (const ArcDeletion &change)
	notify the constraint of a modification of the graph More...
void	modifyGraph (const ArcReversal &change)
	notify the constraint of a modification of the graph More...
void	modifyGraph (const GraphChange &change)
	notify the constraint of a modification of the graph More...
bool	isAlwaysInvalid (const GraphChange &change) const
	indicates whether a change will always violate the constraint More...
bool	checkArcAddition (NodeId x, NodeId y) const
	checks whether the constraints enable to add arc (x,y) More...
bool	checkArcDeletion (NodeId x, NodeId y) const
	checks whether the constraints enable to remove arc (x,y) More...
bool	checkArcReversal (NodeId x, NodeId y) const
	checks whether the constraints enable to reverse arc (x,y) More...
bool	checkModification (const ArcAddition &change) const
	checks whether the constraints enable to add an arc More...
bool	checkModification (const ArcDeletion &change) const
	checks whether the constraints enable to remove an arc More...
bool	checkModification (const ArcReversal &change) const
	checks whether the constraints enable to reverse an arc More...
bool	checkModification (const GraphChange &change) const
	checks whether the constraints enable to perform a graph change More...

Protected Types
using	constraints = typename StructuralConstraintSetStatic__< StructuralConstraintDiGraph, OTHER_CONSTRAINTS... >::minConstraints

Detailed Description

the class for structural constraints limiting the number of parents of nodes in a directed graph

Definition at line 48 of file structuralConstraintIndegree.h.

Member Typedef Documentation

constraints

using gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::constraints = typename StructuralConstraintSetStatic__< StructuralConstraintDiGraph , OTHER_CONSTRAINTS... >::minConstraints

inherited

Definition at line 432 of file structuralConstraintSetStatic.h.

Constructor & Destructor Documentation

StructuralConstraintIndegree() [1/5]

gum::learning::StructuralConstraintIndegree::StructuralConstraintIndegree

(

)

default constructor

Definition at line 41 of file structuralConstraintIndegree.cpp.

References gum::learning::genericBNLearner::Database::Database().

                                                               {
      GUM_CONSTRUCTOR(StructuralConstraintIndegree);
    }

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StructuralConstraintIndegree() [2/5]

gum::learning::StructuralConstraintIndegree::StructuralConstraintIndegree	(	Size	nb_nodes,
		Size	max_indegree
	)

constructor starting with an empty graph with a given number of nodes

Definition at line 46 of file structuralConstraintIndegree.cpp.

References gum::learning::genericBNLearner::Database::Database().

                                                                                  :
        StructuralConstraintDiGraph(nb_nodes),
        Indegree__max_indegree_(max_indegree) {
      for (NodeId i = 0; i < nb_nodes; ++i) {
        Indegree__max_parents_.insert(i, max_indegree);
      }
      GUM_CONSTRUCTOR(StructuralConstraintIndegree);
    }

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StructuralConstraintIndegree() [3/5]

gum::learning::StructuralConstraintIndegree::StructuralConstraintIndegree	(	const DiGraph &	graph,
		Size	max_indegree
	)

constructor starting with a given graph

Definition at line 57 of file structuralConstraintIndegree.cpp.

References gum::learning::genericBNLearner::Database::Database().

                                    :
        StructuralConstraintDiGraph(graph),
        Indegree__max_indegree_(max_indegree) {
      for (const auto id: graph) {
        Indegree__max_parents_.insert(id, max_indegree);
      }
      GUM_CONSTRUCTOR(StructuralConstraintIndegree);
    }

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StructuralConstraintIndegree() [4/5]

gum::learning::StructuralConstraintIndegree::StructuralConstraintIndegree

(

const StructuralConstraintIndegree &

from

)

copy constructor

Definition at line 69 of file structuralConstraintIndegree.cpp.

References gum::learning::genericBNLearner::Database::Database().

                                                 :
        StructuralConstraintDiGraph(from),
        Indegree__max_parents_(from.Indegree__max_parents_),
        Indegree__max_indegree_(from.Indegree__max_indegree_) {
      GUM_CONS_CPY(StructuralConstraintIndegree);
    }

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StructuralConstraintIndegree() [5/5]

gum::learning::StructuralConstraintIndegree::StructuralConstraintIndegree

(

StructuralConstraintIndegree &&

from

)

move constructor

Definition at line 78 of file structuralConstraintIndegree.cpp.

References gum::learning::genericBNLearner::Database::Database().

                                            :
        StructuralConstraintDiGraph(std::move(from)),
        Indegree__max_parents_(std::move(from.Indegree__max_parents_)),
        Indegree__max_indegree_(std::move(from.Indegree__max_indegree_)) {
      GUM_CONS_MOV(StructuralConstraintIndegree);
    }

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~StructuralConstraintIndegree()

gum::learning::StructuralConstraintIndegree::~StructuralConstraintIndegree ( )

virtual

destructor

Definition at line 87 of file structuralConstraintIndegree.cpp.

References gum::learning::genericBNLearner::Database::Database().

                                                                {
      GUM_DESTRUCTOR(StructuralConstraintIndegree);
    }

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Member Function Documentation

checkArcAddition()

bool gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::checkArcAddition ( NodeId  x, NodeId  y  ) const

inherited

checks whether the constraints enable to add arc (x,y)

checkArcAdditionAlone()

bool gum::learning::StructuralConstraintIndegree::checkArcAdditionAlone	(	NodeId	x,
		NodeId	y
	)		const

checks whether the constraints enable to add arc (x,y)

an arc can be added if and only if its extremal nodes belong to the graph and the arc does not already exist and its addition would not violate the indegree constraint of y.

checkArcDeletion()

bool gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::checkArcDeletion ( NodeId  x, NodeId  y  ) const

inherited

checks whether the constraints enable to remove arc (x,y)

checkArcDeletionAlone()

bool gum::learning::StructuralConstraintIndegree::checkArcDeletionAlone	(	NodeId	x,
		NodeId	y
	)		const

checks whether the constraints enable to remove arc (x,y)

an arc can be removed if and only if the arc exists.

checkArcReversal()

bool gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::checkArcReversal ( NodeId  x, NodeId  y  ) const

inherited

checks whether the constraints enable to reverse arc (x,y)

checkArcReversalAlone()

bool gum::learning::StructuralConstraintIndegree::checkArcReversalAlone	(	NodeId	x,
		NodeId	y
	)		const

checks whether the constraints enable to reverse arc (x,y)

an arc can be reversed if and only if it exists and arc (y,x) does not and its addition would not violate the indegree constraint of x.

checkModification() [1/4]

bool gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::checkModification ( const ArcAddition &  change ) const

inherited

checks whether the constraints enable to add an arc

checkModification() [2/4]

bool gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::checkModification ( const ArcDeletion &  change ) const

inherited

checks whether the constraints enable to remove an arc

checkModification() [3/4]

bool gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::checkModification ( const ArcReversal &  change ) const

inherited

checks whether the constraints enable to reverse an arc

checkModification() [4/4]

bool gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::checkModification ( const GraphChange &  change ) const

inherited

checks whether the constraints enable to perform a graph change

checkModificationAlone() [1/4]

bool gum::learning::StructuralConstraintIndegree::checkModificationAlone

(

const ArcAddition &

change

)

const

checks whether the constraints enable to add an arc

an arc can be added if and only if its extremal nodes belong to the graph and the arc does not already exist and its addition would not violate the indegree constraint of y.

checkModificationAlone() [2/4]

bool gum::learning::StructuralConstraintIndegree::checkModificationAlone

(

const ArcDeletion &

change

)

const

checks whether the constraints enable to remove an arc

an arc can be removed if and only if the arc exists.

checkModificationAlone() [3/4]

bool gum::learning::StructuralConstraintIndegree::checkModificationAlone

(

const ArcReversal &

change

)

const

checks whether the constraints enable to reverse an arc

an arc can be reversed if and only if it exists and arc (y,x) does not and its addition would not violate the indegree constraint of x.

checkModificationAlone() [4/4]

bool gum::learning::StructuralConstraintIndegree::checkModificationAlone

(

const GraphChange &

change

)

const

checks whether the constraints enable to perform a graph change

An arc can be added if and only if its extremal nodes belong to the graph and the arc does not already exist and its addition would not violate the indegree constraint of y. An arc can be removed if and only if the arc exists. An arc can be reversed if and only if it exists and arc (y,x) does not and its addition would not violate the indegree constraint of x.

isAlwaysInvalid()

bool gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::isAlwaysInvalid ( const GraphChange &  change ) const

inherited

indicates whether a change will always violate the constraint

isAlwaysInvalidAlone()

bool gum::learning::StructuralConstraintIndegree::isAlwaysInvalidAlone

(

const GraphChange &

change

)

const

indicates whether a change will always violate the constraint

Some learning algorithms need examine several times whether a given graph change can be applied. For instance, the first time arc (X,Y) addition is considered, the learning algorithm may discard this change because it violates the structural constraint (e.g., if the latter enforces a DAG structure, this arc addition might induce a directed cycle), but, later on, other arc removal may induce that the arc addition is now possible. Such change is thus not always invalid. Conversely, there are changes that can be discarded once and for all. For instance, in a 2TBN structure, it is always impossible to add a backward-time arc. Such graph changes are always invalid and are therefore tagged as such by the isAlwaysInvalid method.

modifyGraph() [1/4]

void gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::modifyGraph ( const ArcAddition &  change )

inherited

notify the constraint of a modification of the graph

modifyGraph() [2/4]

void gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::modifyGraph ( const ArcDeletion &  change )

inherited

notify the constraint of a modification of the graph

modifyGraph() [3/4]

void gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::modifyGraph ( const ArcReversal &  change )

inherited

notify the constraint of a modification of the graph

modifyGraph() [4/4]

void gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::modifyGraph ( const GraphChange &  change )

inherited

notify the constraint of a modification of the graph

modifyGraphAlone() [1/4]

void gum::learning::StructuralConstraintIndegree::modifyGraphAlone

(

const ArcAddition &

change

)

notify the constraint of a modification of the graph

Warning

If an already existing arc is added, nothing is done. In particular, no exception is raised.

Exceptions

InvalidNode	exception is thrown if an arc (x,y) is added and x or y does not belong to the graph nodes
OutOfUpperBound	exception is thrown if the indegree constraint is violated by the arc addition.

modifyGraphAlone() [2/4]

void gum::learning::StructuralConstraintIndegree::modifyGraphAlone

(

const ArcDeletion &

change

)

notify the constraint of a modification of the graph

Warning

If a nonexisting arc is removed, nothing is done. In particular, no exception is raised.

modifyGraphAlone() [3/4]

void gum::learning::StructuralConstraintIndegree::modifyGraphAlone

(

const ArcReversal &

change

)

notify the constraint of a modification of the graph

Warning

If an already existing arc is added, or if a nonexisting arc is removed, nothing is done. In particular, no exception is raised.

Exceptions

InvalidNode	exception is thrown if an arc (x,y) is added and x or y does not belong to the graph nodes
OutOfUpperBound	exception is thrown if the indegree constraint is violated by the arc reversal.

modifyGraphAlone() [4/4]

void gum::learning::StructuralConstraintIndegree::modifyGraphAlone

(

const GraphChange &

change

)

notify the constraint of a modification of the graph

Warning

If an already existing arc is added, or if a nonexisting arc is removed, nothing is done. In particular, no exception is raised.

Exceptions

InvalidNode	exception is thrown if an arc (x,y) is added and x or y does not belong to the graph nodes
OutOfUpperBound	exception is thrown if the indegree constraint is violated by an arc addition or reversal.

operator=() [1/2]

StructuralConstraintIndegree & gum::learning::StructuralConstraintIndegree::operator=

(

const StructuralConstraintIndegree &

from

)

copy operator

Definition at line 92 of file structuralConstraintIndegree.cpp.

References gum::learning::genericBNLearner::Database::Database().

                                                 {
      if (this != &from) {
        StructuralConstraintDiGraph::operator=(from);
        Indegree__max_parents_               = from.Indegree__max_parents_;
        Indegree__max_indegree_              = from.Indegree__max_indegree_;
      }

      return *this;
    }

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operator=() [2/2]

StructuralConstraintIndegree & gum::learning::StructuralConstraintIndegree::operator=

(

StructuralConstraintIndegree &&

from

)

move operator

Definition at line 104 of file structuralConstraintIndegree.cpp.

References gum::learning::genericBNLearner::Database::Database().

                                            {
      if (this != &from) {
        StructuralConstraintDiGraph::operator=(std::move(from));
        Indegree__max_parents_  = std::move(from.Indegree__max_parents_);
        Indegree__max_indegree_ = std::move(from.Indegree__max_indegree_);
      }

      return *this;
    }

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setGraph()

void gum::learning::StructuralConstraintSetStatic< StructuralConstraintDiGraph , OTHER_CONSTRAINTS >::setGraph ( const DiGraph &  graph )

inherited

sets a new graph from which we will perform checkings

setGraphAlone()

void gum::learning::StructuralConstraintIndegree::setGraphAlone

(

const DiGraph &

graph

)

sets a new graph from which we will perform checkings

setIndegree()

void gum::learning::StructuralConstraintIndegree::setIndegree

(

const NodeProperty< Size > &

max_indegree

)

sets the default max indegree for all the nodes in the property

setMaxIndegree()

void gum::learning::StructuralConstraintIndegree::setMaxIndegree	(	Size	max_indegree,
		bool	update_all_node = false
	)

resets the default max indegree and possibly updates the indegree of all nodes

Member Data Documentation

Indegree__max_indegree_

Size gum::learning::StructuralConstraintIndegree::Indegree__max_indegree_ {std::numeric_limits< Size >::max()}

protected

a default max indegree to assign for nodes without specified indegree

Definition at line 212 of file structuralConstraintIndegree.h.

Indegree__max_parents_

NodeProperty< Size > gum::learning::StructuralConstraintIndegree::Indegree__max_parents_

protected

the max number of parents per node

Definition at line 209 of file structuralConstraintIndegree.h.

---

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

• agrum/BN/learning/constraints/structuralConstraintIndegree.h
• agrum/BN/learning/constraints/structuralConstraintIndegree.cpp