The basic class for computing the next graph changes possible in an undirected structure learning algorithm. More...

#include <graphChangesGenerator4UndiGraph.h>

Inheritance diagram for gum::learning::GraphChangesGenerator4UndiGraph< STRUCT_CONSTRAINT >:

Collaboration diagram for gum::learning::GraphChangesGenerator4UndiGraph< STRUCT_CONSTRAINT >:

Public Member Functions
Constructors / Destructors
	GraphChangesGenerator4UndiGraph (STRUCT_CONSTRAINT &constraint)
	default constructor More...

	GraphChangesGenerator4UndiGraph (const GraphChangesGenerator4UndiGraph< STRUCT_CONSTRAINT > &from)
	copy constructor More...

	GraphChangesGenerator4UndiGraph (GraphChangesGenerator4UndiGraph< STRUCT_CONSTRAINT > &&from)
	move operator More...

virtual	~GraphChangesGenerator4UndiGraph ()
	destructor More...

Operators
GraphChangesGenerator4UndiGraph< STRUCT_CONSTRAINT > &	operator= (const GraphChangesGenerator4UndiGraph< STRUCT_CONSTRAINT > &from)
	copy operator More...

GraphChangesGenerator4UndiGraph< STRUCT_CONSTRAINT > &	operator= (GraphChangesGenerator4UndiGraph< STRUCT_CONSTRAINT > &&from)
	move operator More...

Iterators
iterator	begin () const
	returns an (unsafe) iterator on the beginning of the list of operators More...

const iterator &	end () const
	returns an (unsafe) iterator on the end of the list of operators More...

Accessors / Modifiers
STRUCT_CONSTRAINT &	constraint () const noexcept
	returns the constraint that is used by the generator More...

void	setGraph (const UndiGraph &graph)
	sets a new graph from which the operator will compute possible changes More...

void	modifyGraph (const EdgeAddition &change)
	notify the operator set of a change applied to the graph More...

void	modifyGraph (const EdgeDeletion &change)
	notify the operator set of a change applied to the graph More...

void	modifyGraph (const GraphChange &change)
	notify the operator set of a change applied to the graph More...

void	clearChanges () noexcept
	empty the set of possible change operators that can be applied More...

void	notifyGetCompleted ()
	notifies the generator that we have parsed all its legal changes More...

void	setMaxNbThreads (Size nb) noexcept
	sets the maximum number of threads used to compute the set of changes More...

Public Types
using	iterator = typename Set< GraphChange >::const_iterator
	the iterator for parsing the list of possible graph change operators More...

using	const_iterator = iterator
	the const iterator for parsing the list of graph change operators More...

Protected Attributes
UndiGraph	graph_
	the graph on which we generate operators More...

STRUCT_CONSTRAINT *	constraint_
	a reference on the structural constraint used to restrict the changes More...

Set< GraphChange >	legal_changes_
	the current set of operators More...

Protected Member Functions
void	createChanges_ ()
	create the set of legal and illegal changes from a given graph More...

Detailed Description

template<typename STRUCT_CONSTRAINT>
class gum::learning::GraphChangesGenerator4UndiGraph< STRUCT_CONSTRAINT >

The basic class for computing the next graph changes possible in an undirected structure learning algorithm.

Structure learning algorithm try different modifications of the graph. Class GraphChangesGenerator4UndiGraph provides a simple way to compute those that we wish to perform. For instance, in the basic PC algorithm for learning undirected graphs, one may expect that all possible edge additions and deletions can be applied and GraphChangesGenerator4UndiGraph provides exactly this set of operations. This class provides the following minimal methods:

void setGraph ( const UndiGraph& ) : assigns a new graph as a starting point to the generator of graph change operators
void modifyGraph ( const GraphChange& ) : indicate to the operator set that the graph has been changed and that we need to compute the new operators that result from this change
void clearChanges () : empty the set of possible operators
methods begin () and end () that return iterators allowing to parse the available set of operators.

Basically, the idea is to use method setGraph at the beginning of the structure learning in order to initialize the possible set of operators. Then, parse this set using a for ( auto iter = operator_set.begin (); iter != operator_set.end (); ++iter ) loop and compute the scores induced by these changes. When this is done, flush the operator set by calling method clearChanges. Then iterate changes and after each new change applied, used again the iterator for loop, and so on. Note that, whenever you execute method modifyGraph, this will automatically flush the current list of changes and put into the list only the changes that are affected by the graph modification.

Definition at line 110 of file graphChangesGenerator4UndiGraph.h.