gum::learning::StructuralConstraintUndiGraph Class Reference

The base class for structural constraints used by learning algorithms that learn an undirected graph structure. More...

#include <structuralConstraintUndiGraph.h>

Inheritance diagram for gum::learning::StructuralConstraintUndiGraph:

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Public Member Functions
Constructors / Destructors
	StructuralConstraintUndiGraph ()
	default constructor More...
	StructuralConstraintUndiGraph (Size nb_nodes)
	constructor starting with an empty graph with a given number of nodes More...
	StructuralConstraintUndiGraph (const UndiGraph &graph)
	constructor starting with a given graph More...
	StructuralConstraintUndiGraph (const StructuralConstraintUndiGraph &from)
	copy constructor More...
	StructuralConstraintUndiGraph (StructuralConstraintUndiGraph &&from)
	move constructor More...
virtual	~StructuralConstraintUndiGraph ()
	destructor More...
Operators
StructuralConstraintUndiGraph &	operator= (const StructuralConstraintUndiGraph &from)
	copy operator More...
StructuralConstraintUndiGraph &	operator= (StructuralConstraintUndiGraph &&from)
	move operator More...
Specific Accessors / Modifiers
void	setGraph (Size nb_nodes)
	sets a new empty graph from which we will perform checkings More...
void	setGraphAlone (const UndiGraph &graph)
	sets a new graph from which we will perform checkings More...
void	modifyGraphAlone (const EdgeAddition &change)
	notify the constraint of a modification of the graph More...
void	modifyGraphAlone (const EdgeDeletion &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	checkEdgeAdditionAlone (NodeId x, NodeId y) const
	checks whether the constraints enable to add edge (x,y) More...
bool	checkEdgeDeletionAlone (NodeId x, NodeId y) const
	checks whether the constraints enable to remove edge (x,y) More...
bool	checkModificationAlone (const GraphChange &change) const
	checks whether the constraints enable to perform a graph change More...
bool	checkModificationAlone (const EdgeAddition &change) const
	checks whether the constraints enable to add an edge More...
bool	checkModificationAlone (const EdgeDeletion &change) const
	checks whether the constraints enable to remove an edge More...

Public Types
using	allConstraints = _ConstraintSet_< void >

Protected Attributes
UndiGraph	_UndiGraph_graph_
	the UndiGraph on which we perform checks More...

Detailed Description

The base class for structural constraints used by learning algorithms that learn an undirected graph structure.

This base should always be a virtual parent of the structural constraints classes. This will allow to combine different constraints into a single class

Definition at line 49 of file structuralConstraintUndiGraph.h.

Member Typedef Documentation

allConstraints

using gum::learning::StructuralConstraintEmpty::allConstraints = _ConstraintSet_< void >

inherited

Definition at line 41 of file structuralConstraint.h.

Constructor & Destructor Documentation

StructuralConstraintUndiGraph() [1/5]

gum::learning::StructuralConstraintUndiGraph::StructuralConstraintUndiGraph

(

)

default constructor

Definition at line 41 of file structuralConstraintUndiGraph.cpp.

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

                                                                 {
      GUM_CONSTRUCTOR(StructuralConstraintUndiGraph);
    }

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StructuralConstraintUndiGraph() [2/5]

gum::learning::StructuralConstraintUndiGraph::StructuralConstraintUndiGraph

(

Size

nb_nodes

)

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

Definition at line 46 of file structuralConstraintUndiGraph.cpp.

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

                                                                              {
      setGraph(nb_nodes);
      GUM_CONSTRUCTOR(StructuralConstraintUndiGraph);
    }

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StructuralConstraintUndiGraph() [3/5]

gum::learning::StructuralConstraintUndiGraph::StructuralConstraintUndiGraph

(

const UndiGraph &

graph

)

constructor starting with a given graph

Definition at line 52 of file structuralConstraintUndiGraph.cpp.

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

                                                                                       {
      setGraph(graph);
      GUM_CONSTRUCTOR(StructuralConstraintUndiGraph);
    }

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StructuralConstraintUndiGraph() [4/5]

gum::learning::StructuralConstraintUndiGraph::StructuralConstraintUndiGraph

(

const StructuralConstraintUndiGraph &

from

)

copy constructor

Definition at line 58 of file structuralConstraintUndiGraph.cpp.

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

                                                  :
        _UndiGraph_graph_(from._UndiGraph_graph_) {
      GUM_CONS_CPY(StructuralConstraintUndiGraph);
    }

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StructuralConstraintUndiGraph() [5/5]

gum::learning::StructuralConstraintUndiGraph::StructuralConstraintUndiGraph

(

StructuralConstraintUndiGraph &&

from

)

move constructor

Definition at line 65 of file structuralConstraintUndiGraph.cpp.

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

                                             :
        _UndiGraph_graph_(std::move(from._UndiGraph_graph_)) {
      GUM_CONS_MOV(StructuralConstraintUndiGraph);
    }

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~StructuralConstraintUndiGraph()

gum::learning::StructuralConstraintUndiGraph::~StructuralConstraintUndiGraph ( )

virtual

destructor

Definition at line 72 of file structuralConstraintUndiGraph.cpp.

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

                                                                  {
      GUM_DESTRUCTOR(StructuralConstraintUndiGraph);
    }

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Member Function Documentation

checkEdgeAdditionAlone()

bool gum::learning::StructuralConstraintUndiGraph::checkEdgeAdditionAlone	(	NodeId	x,
		NodeId	y
	)		const

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

an arc can be added if and only if its extremal nodes belong to the graph and the edge does not already exist.

checkEdgeDeletionAlone()

bool gum::learning::StructuralConstraintUndiGraph::checkEdgeDeletionAlone	(	NodeId	x,
		NodeId	y
	)		const

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

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

checkModificationAlone() [1/3]

bool gum::learning::StructuralConstraintUndiGraph::checkModificationAlone

(

const GraphChange &

change

)

const

checks whether the constraints enable to perform a graph change

An edge can be added if and only if its extremal nodes belong to the graph and the edge does not already exist. An edge can be removed if and only if the edge exists.

checkModificationAlone() [2/3]

bool gum::learning::StructuralConstraintUndiGraph::checkModificationAlone

(

const EdgeAddition &

change

)

const

checks whether the constraints enable to add an edge

an arc can be added if and only if its extremal nodes belong to the graph and the edge does not already exist.

checkModificationAlone() [3/3]

bool gum::learning::StructuralConstraintUndiGraph::checkModificationAlone

(

const EdgeDeletion &

change

)

const

checks whether the constraints enable to remove an edge

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

isAlwaysInvalidAlone()

bool gum::learning::StructuralConstraintUndiGraph::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 edge (X,Y) addition is considered, the learning algorithm may discard this change because it violates the structural constraint, but, later on, other edge removals may induce that the edge 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.

modifyGraphAlone() [1/3]

void gum::learning::StructuralConstraintUndiGraph::modifyGraphAlone

(

const EdgeAddition &

change

)

notify the constraint of a modification of the graph

Warning

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

Exceptions

InvalidNode

exception is thrown if an edge (x,y) is added and x or y does not belong to the graph nodes

modifyGraphAlone() [2/3]

void gum::learning::StructuralConstraintUndiGraph::modifyGraphAlone

(

const EdgeDeletion &

change

)

notify the constraint of a modification of the graph

Warning

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

modifyGraphAlone() [3/3]

void gum::learning::StructuralConstraintUndiGraph::modifyGraphAlone

(

const GraphChange &

change

)

notify the constraint of a modification of the graph

Warning

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

Exceptions

InvalidNode

exception is thrown if an edge (x,y) is added and x or y does not belong to the graph nodes

operator=() [1/2]

StructuralConstraintUndiGraph & gum::learning::StructuralConstraintUndiGraph::operator=

(

const StructuralConstraintUndiGraph &

from

)

copy operator

Definition at line 78 of file structuralConstraintUndiGraph.cpp.

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

                                                                                         {
      if (this != &from) { _UndiGraph_graph_ = from._UndiGraph_graph_; }
      return *this;
    }

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operator=() [2/2]

StructuralConstraintUndiGraph & gum::learning::StructuralConstraintUndiGraph::operator=

(

StructuralConstraintUndiGraph &&

from

)

move operator

Definition at line 85 of file structuralConstraintUndiGraph.cpp.

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

                                                                                    {
      if (this != &from) { _UndiGraph_graph_ = std::move(from._UndiGraph_graph_); }
      return *this;
    }

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setGraph()

void gum::learning::StructuralConstraintUndiGraph::setGraph

(

Size

nb_nodes

)

sets a new empty graph from which we will perform checkings

setGraphAlone()

void gum::learning::StructuralConstraintUndiGraph::setGraphAlone

(

const UndiGraph &

graph

)

sets a new graph from which we will perform checkings

Member Data Documentation

_UndiGraph_graph_

UndiGraph gum::learning::StructuralConstraintUndiGraph::_UndiGraph_graph_

protected

the UndiGraph on which we perform checks

Definition at line 172 of file structuralConstraintUndiGraph.h.

---

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

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