Contains any information related to the clustering that should be directly accessible to PseudoJet. More...

#include <fastjet/ClusterSequenceStructure.hh>

Inheritance diagram for fastjet::ClusterSequenceStructure:

Collaboration diagram for fastjet::ClusterSequenceStructure:

Public Member Functions
	ClusterSequenceStructure ()
	default ctor

	ClusterSequenceStructure (const ClusterSequence *cs)
	ctor with initialisation to a given ClusterSequence More...

virtual	~ClusterSequenceStructure ()
	default (virtual) dtor

virtual std::string	description () const
	description

Direct access to the associated ClusterSequence object.
Get access to the associated ClusterSequence (if any)
virtual bool	has_associated_cluster_sequence () const
	returns true if there is an associated ClusterSequence

virtual const ClusterSequence *	associated_cluster_sequence () const
	get a (const) pointer to the parent ClusterSequence (NULL if inexistent)

virtual bool	has_valid_cluster_sequence () const
	returns true if there is a valid associated ClusterSequence

virtual const ClusterSequence *	validated_cs () const
	if the jet has a valid associated cluster sequence then return a pointer to it; otherwise throw an error

virtual const ClusterSequenceAreaBase *	validated_csab () const
	if the jet has valid area information then return a pointer to the associated ClusterSequenceAreaBase object; otherwise throw an error

virtual void	set_associated_cs (const ClusterSequence *new_cs)
	set the associated csw

Methods for access to information about jet structure
These allow access to jet constituents, and other jet subtructure information. They only work if the jet is associated with a ClusterSequence.
virtual bool	has_partner (const PseudoJet &reference, PseudoJet &partner) const
	check if it has been recombined with another PseudoJet in which case, return its partner through the argument. More...

virtual bool	has_child (const PseudoJet &reference, PseudoJet &child) const
	check if it has been recombined with another PseudoJet in which case, return its child through the argument. More...

virtual bool	has_parents (const PseudoJet &reference, PseudoJet &parent1, PseudoJet &parent2) const
	check if it is the product of a recombination, in which case return the 2 parents through the 'parent1' and 'parent2' arguments. More...

virtual bool	object_in_jet (const PseudoJet &reference, const PseudoJet &jet) const
	check if the reference PseudoJet is contained in the second one passed as argument. More...

virtual bool	has_constituents () const
	return true if the structure supports constituents. More...

virtual std::vector< PseudoJet >	constituents (const PseudoJet &reference) const
	retrieve the constituents. More...

virtual bool	has_exclusive_subjets () const
	return true if the structure supports exclusive_subjets. More...

virtual std::vector< PseudoJet >	exclusive_subjets (const PseudoJet &reference, const double &dcut) const
	return a vector of all subjets of the current jet (in the sense of the exclusive algorithm) that would be obtained when running the algorithm with the given dcut. More...

virtual int	n_exclusive_subjets (const PseudoJet &reference, const double &dcut) const
	return the size of exclusive_subjets(...); still n ln n with same coefficient, but marginally more efficient than manually taking exclusive_subjets.size() More...

virtual std::vector< PseudoJet >	exclusive_subjets_up_to (const PseudoJet &reference, int nsub) const
	return the list of subjets obtained by unclustering the supplied jet down to nsub subjets (or all constituents if there are fewer than nsub). More...

virtual double	exclusive_subdmerge (const PseudoJet &reference, int nsub) const
	return the dij that was present in the merging nsub+1 -> nsub subjets inside this jet. More...

virtual double	exclusive_subdmerge_max (const PseudoJet &reference, int nsub) const
	return the maximum dij that occurred in the whole event at the stage that the nsub+1 -> nsub merge of subjets occurred inside this jet. More...

virtual bool	has_pieces (const PseudoJet &reference) const
	by convention, a jet associated with a ClusterSequence will have its parents as pieces

virtual std::vector< PseudoJet >	pieces (const PseudoJet &reference) const
	by convention, a jet associated with a ClusterSequence will have its parents as pieces More...

virtual bool	has_area () const
	check if it has a defined area

virtual double	area (const PseudoJet &reference) const
	return the jet (scalar) area. More...

virtual double	area_error (const PseudoJet &reference) const
	return the error (uncertainty) associated with the determination of the area of this jet. More...

virtual PseudoJet	area_4vector (const PseudoJet &reference) const
	return the jet 4-vector area. More...

virtual bool	is_pure_ghost (const PseudoJet &reference) const
	true if this jet is made exclusively of ghosts. More...

Public Member Functions inherited from fastjet::PseudoJetStructureBase
	PseudoJetStructureBase ()
	default ctor

virtual	~PseudoJetStructureBase ()
	default (virtual) dtor

Protected Attributes
const ClusterSequence *	_associated_cs

Detailed Description

Contains any information related to the clustering that should be directly accessible to PseudoJet.

By default, this class implements basic access to the ClusterSequence related to a PseudoJet (like its constituents or its area). But it can be overloaded in order e.g. to give access to the jet substructure.

Definition at line 61 of file ClusterSequenceStructure.hh.

Constructor & Destructor Documentation

fastjet::ClusterSequenceStructure::ClusterSequenceStructure ( const ClusterSequence * cs )

inline

ctor with initialisation to a given ClusterSequence

In principle, this is reserved for initialisation by the parent ClusterSequence

Definition at line 70 of file ClusterSequenceStructure.hh.

Member Function Documentation

bool fastjet::ClusterSequenceStructure::has_partner	(	const PseudoJet &	reference,
		PseudoJet &	partner
	)		const

virtual

check if it has been recombined with another PseudoJet in which case, return its partner through the argument.

Otherwise, 'partner' is set to 0.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 100 of file ClusterSequenceStructure.cc.

bool fastjet::ClusterSequenceStructure::has_child	(	const PseudoJet &	reference,
		PseudoJet &	child
	)		const

virtual

check if it has been recombined with another PseudoJet in which case, return its child through the argument.

Otherwise, 'child' is set to 0.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 110 of file ClusterSequenceStructure.cc.

bool fastjet::ClusterSequenceStructure::has_parents	(	const PseudoJet &	reference,
		PseudoJet &	parent1,
		PseudoJet &	parent2
	)		const

virtual

check if it is the product of a recombination, in which case return the 2 parents through the 'parent1' and 'parent2' arguments.

Otherwise, set these to 0.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 120 of file ClusterSequenceStructure.cc.

bool fastjet::ClusterSequenceStructure::object_in_jet	(	const PseudoJet &	reference,
		const PseudoJet &	jet
	)		const

virtual

check if the reference PseudoJet is contained in the second one passed as argument.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

false is returned if the 2 PseudoJet do not belong the same ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 129 of file ClusterSequenceStructure.cc.

bool fastjet::ClusterSequenceStructure::has_constituents ( ) const

virtual

return true if the structure supports constituents.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 143 of file ClusterSequenceStructure.cc.

vector< PseudoJet > fastjet::ClusterSequenceStructure::constituents ( const PseudoJet & reference ) const

virtual

retrieve the constituents.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 153 of file ClusterSequenceStructure.cc.

bool fastjet::ClusterSequenceStructure::has_exclusive_subjets ( ) const

virtual

return true if the structure supports exclusive_subjets.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 161 of file ClusterSequenceStructure.cc.

std::vector< PseudoJet > fastjet::ClusterSequenceStructure::exclusive_subjets	(	const PseudoJet &	reference,
		const double &	dcut
	)		const

virtual

return a vector of all subjets of the current jet (in the sense of the exclusive algorithm) that would be obtained when running the algorithm with the given dcut.

Time taken is O(m ln m), where m is the number of subjets that are found. If m gets to be of order of the total number of constituents in the jet, this could be substantially slower than just getting that list of constituents.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 179 of file ClusterSequenceStructure.cc.

int fastjet::ClusterSequenceStructure::n_exclusive_subjets	(	const PseudoJet &	reference,
		const double &	dcut
	)		const

virtual

return the size of exclusive_subjets(...); still n ln n with same coefficient, but marginally more efficient than manually taking exclusive_subjets.size()

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 189 of file ClusterSequenceStructure.cc.

std::vector< PseudoJet > fastjet::ClusterSequenceStructure::exclusive_subjets_up_to	(	const PseudoJet &	reference,
		int	nsub
	)		const

virtual

return the list of subjets obtained by unclustering the supplied jet down to nsub subjets (or all constituents if there are fewer than nsub).

requires nsub ln nsub time

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 201 of file ClusterSequenceStructure.cc.

double fastjet::ClusterSequenceStructure::exclusive_subdmerge	(	const PseudoJet &	reference,
		int	nsub
	)		const

virtual

return the dij that was present in the merging nsub+1 -> nsub subjets inside this jet.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 210 of file ClusterSequenceStructure.cc.

double fastjet::ClusterSequenceStructure::exclusive_subdmerge_max	(	const PseudoJet &	reference,
		int	nsub
	)		const

virtual

return the maximum dij that occurred in the whole event at the stage that the nsub+1 -> nsub merge of subjets occurred inside this jet.

an Error is thrown if this PseudoJet has no currently valid associated ClusterSequence

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 220 of file ClusterSequenceStructure.cc.

vector< PseudoJet > fastjet::ClusterSequenceStructure::pieces ( const PseudoJet & reference ) const

virtual

by convention, a jet associated with a ClusterSequence will have its parents as pieces

if it has no parents, then there will only be a single piece: itself

Note that to answer that question, we need to access the cluster sequence. If the cluster sequence has gone out of scope, an error will be thrown

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 244 of file ClusterSequenceStructure.cc.

double fastjet::ClusterSequenceStructure::area ( const PseudoJet & reference ) const

virtual

return the jet (scalar) area.

throws an Error if there is no support for area in the parent CS

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 278 of file ClusterSequenceStructure.cc.

double fastjet::ClusterSequenceStructure::area_error ( const PseudoJet & reference ) const

virtual

return the error (uncertainty) associated with the determination of the area of this jet.

throws an Error if there is no support for area in the parent CS

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 285 of file ClusterSequenceStructure.cc.

PseudoJet fastjet::ClusterSequenceStructure::area_4vector ( const PseudoJet & reference ) const

virtual

return the jet 4-vector area.

throws an Error if there is no support for area in the parent CS

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 291 of file ClusterSequenceStructure.cc.

bool fastjet::ClusterSequenceStructure::is_pure_ghost ( const PseudoJet & reference ) const

virtual

true if this jet is made exclusively of ghosts.

throws an Error if there is no support for area in the parent CS

Reimplemented from fastjet::PseudoJetStructureBase.

Definition at line 297 of file ClusterSequenceStructure.cc.

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

include/fastjet/ClusterSequenceStructure.hh
src/ClusterSequenceStructure.cc

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation