gum::learning::StructuralConstraintSliceOrder Class Reference

the structural constraint imposing a partial order over nodes More...

#include <structuralConstraintSliceOrder.h>

Inheritance diagram for gum::learning::StructuralConstraintSliceOrder:

Collaboration diagram for gum::learning::StructuralConstraintSliceOrder:

Public Member Functions
Constructors / Destructors
	StructuralConstraintSliceOrder ()
	default constructor More...
	StructuralConstraintSliceOrder (const NodeProperty< NodeId > &order)
	constructor starting with an empty graph with a given number of nodes More...
	StructuralConstraintSliceOrder (const DiGraph &graph, const NodeProperty< NodeId > &order)
	constructor starting with a given graph More...
	StructuralConstraintSliceOrder (const StructuralConstraintSliceOrder &from)
	copy constructor More...
	StructuralConstraintSliceOrder (StructuralConstraintSliceOrder &&from)
	move constructor More...
virtual	~StructuralConstraintSliceOrder ()
	destructor More...
Operators
StructuralConstraintSliceOrder &	operator= (const StructuralConstraintSliceOrder &from)
	copy operator More...
StructuralConstraintSliceOrder &	operator= (StructuralConstraintSliceOrder &&from)
	move operator More...
Specific Accessors / Modifiers
void	setSliceOrder (const NodeProperty< NodeId > &slice)
	sets the time slices of all the nodes in the property More...
const NodeProperty< NodeId > &	sliceOrder () const
	returns the current slice order More...
void	addNode (NodeId node, NodeId slice)
	adds a new node in the slice order More...
void	setDefaultSlice (NodeId slice)
	assign a given slice to all the nodes specified in the partial order 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< NodeId >	_SliceOrder_order_
	slices to which belong the nodes 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 structural constraint imposing a partial order over nodes

In DBNs, it is forbidden to add arcs from nodes at time slice t to nodes at time slice s, where s < t. This class allows for taking this kind of constraint into account by imposing a partial order over the nodes: arcs (X,Y) can then only be added if X <= Y in the partial order.

Warning

: there may exist free variables, that is variables whose order w.r.t. the other variables is unspecified. In this case, arcs adjacent to them can be constructed. The partial order is specified by assigning numbers to nodes (through a NodeProperty). Nodes without number (i.e., that do not belong to the property) are free.

Definition at line 66 of file structuralConstraintSliceOrder.h.

Member Typedef Documentation

constraints

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

inherited

Definition at line 408 of file structuralConstraintSetStatic.h.

Constructor & Destructor Documentation

StructuralConstraintSliceOrder() [1/5]

gum::learning::StructuralConstraintSliceOrder::StructuralConstraintSliceOrder

(

)

default constructor

Definition at line 51 of file structuralConstraintSliceOrder.cpp.

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

                                                                   {
      GUM_CONSTRUCTOR(StructuralConstraintSliceOrder);
    }

Here is the call graph for this function:

StructuralConstraintSliceOrder() [2/5]

gum::learning::StructuralConstraintSliceOrder::StructuralConstraintSliceOrder

(

const NodeProperty< NodeId > &

order

)

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

param order the partial order

Definition at line 56 of file structuralConstraintSliceOrder.cpp.

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

                                            {
      for (auto iter = order.cbegin(); iter != order.cend(); ++iter) {
        _DiGraph_graph_.addNodeWithId(iter.key());
      }
      _SliceOrder_order_ = order;

      GUM_CONSTRUCTOR(StructuralConstraintSliceOrder);
    }

Here is the call graph for this function:

StructuralConstraintSliceOrder() [3/5]

gum::learning::StructuralConstraintSliceOrder::StructuralConstraintSliceOrder	(	const DiGraph &	graph,
		const NodeProperty< NodeId > &	order
	)

constructor starting with a given graph

Definition at line 67 of file structuralConstraintSliceOrder.cpp.

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

                                            :
        StructuralConstraintDiGraph(graph),
        _SliceOrder_order_(order) {
      GUM_CONSTRUCTOR(StructuralConstraintSliceOrder);
    }

Here is the call graph for this function:

StructuralConstraintSliceOrder() [4/5]

gum::learning::StructuralConstraintSliceOrder::StructuralConstraintSliceOrder

(

const StructuralConstraintSliceOrder &

from

)

copy constructor

Definition at line 76 of file structuralConstraintSliceOrder.cpp.

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

                                                   :
        StructuralConstraintDiGraph(from),
        _SliceOrder_order_(from._SliceOrder_order_) {
      GUM_CONS_CPY(StructuralConstraintSliceOrder);
    }

Here is the call graph for this function:

StructuralConstraintSliceOrder() [5/5]

gum::learning::StructuralConstraintSliceOrder::StructuralConstraintSliceOrder

(

StructuralConstraintSliceOrder &&

from

)

move constructor

Definition at line 84 of file structuralConstraintSliceOrder.cpp.

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

                                              :
        StructuralConstraintDiGraph(std::move(from)),
        _SliceOrder_order_(std::move(from._SliceOrder_order_)) {
      GUM_CONS_MOV(StructuralConstraintSliceOrder);
    }

Here is the call graph for this function:

~StructuralConstraintSliceOrder()

gum::learning::StructuralConstraintSliceOrder::~StructuralConstraintSliceOrder ( )

virtual

destructor

Definition at line 92 of file structuralConstraintSliceOrder.cpp.

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

                                                                    {
      GUM_DESTRUCTOR(StructuralConstraintSliceOrder);
    }

Here is the call graph for this function:

Member Function Documentation

addNode()

void gum::learning::StructuralConstraintSliceOrder::addNode	(	NodeId	node,
		NodeId	slice
	)

adds a new node in the slice order

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::StructuralConstraintSliceOrder::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 is not a backward-time arc.

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::StructuralConstraintSliceOrder::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::StructuralConstraintSliceOrder::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 is not a backward-time arc.

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::StructuralConstraintSliceOrder::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 is not a backward-time arc.

checkModificationAlone() [2/4]

bool gum::learning::StructuralConstraintSliceOrder::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::StructuralConstraintSliceOrder::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 is not a backward-time arc.

checkModificationAlone() [4/4]

bool gum::learning::StructuralConstraintSliceOrder::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 is not a backward-time arc. An arc can be removed if and only if the arc exists. An arc (x,y) can be reversed if and only if it exists and arc (y,x) does not and is not a backward-time arc.

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::StructuralConstraintSliceOrder::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::StructuralConstraintSliceOrder::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
InvalidArc	exception is thrown if any time-backward arc is created by the arc addition.

modifyGraphAlone() [2/4]

void gum::learning::StructuralConstraintSliceOrder::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::StructuralConstraintSliceOrder::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
InvalidArc	exception is thrown if any time-backward arc is created by the arc reversal.

modifyGraphAlone() [4/4]

void gum::learning::StructuralConstraintSliceOrder::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 or reversed and x or y does not belong to the graph nodes
InvalidArc	exception is thrown if any time-backward arc is created by an arc addition or reversal.

operator=() [1/2]

StructuralConstraintSliceOrder & gum::learning::StructuralConstraintSliceOrder::operator=

(

const StructuralConstraintSliceOrder &

from

)

copy operator

Definition at line 98 of file structuralConstraintSliceOrder.cpp.

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

                                                                                           {
      if (this != &from) {
        StructuralConstraintDiGraph::operator=(from);
        _SliceOrder_order_                   = from._SliceOrder_order_;
      }
      return *this;
    }

Here is the call graph for this function:

operator=() [2/2]

StructuralConstraintSliceOrder & gum::learning::StructuralConstraintSliceOrder::operator=

(

StructuralConstraintSliceOrder &&

from

)

move operator

Definition at line 108 of file structuralConstraintSliceOrder.cpp.

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

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

Here is the call graph for this function:

setDefaultSlice()

void gum::learning::StructuralConstraintSliceOrder::setDefaultSlice

(

NodeId

slice

)

assign a given slice to all the nodes specified in the partial order

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::StructuralConstraintSliceOrder::setGraphAlone

(

const DiGraph &

graph

)

sets a new graph from which we will perform checkings

setSliceOrder()

void gum::learning::StructuralConstraintSliceOrder::setSliceOrder

(

const NodeProperty< NodeId > &

slice

)

sets the time slices of all the nodes in the property

sliceOrder()

const NodeProperty< NodeId >& gum::learning::StructuralConstraintSliceOrder::sliceOrder

(

)

const

returns the current slice order

Member Data Documentation

_SliceOrder_order_

NodeProperty< NodeId > gum::learning::StructuralConstraintSliceOrder::_SliceOrder_order_

protected

slices to which belong the nodes

Definition at line 229 of file structuralConstraintSliceOrder.h.

---

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

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