TMVA::ExpectedErrorPruneTool Class Reference

Definition at line 59 of file ExpectedErrorPruneTool.h.

Public Member Functions
	ExpectedErrorPruneTool ()
virtual	~ExpectedErrorPruneTool ()
virtual PruningInfo *	CalculatePruningInfo (DecisionTree *dt, const IPruneTool::EventSample *testEvents=NULL, Bool_t isAutomatic=kFALSE)
void	SetPruneStrengthIncrement (Double_t dalpha)
Public Member Functions inherited from TMVA::IPruneTool
	IPruneTool ()
virtual	~IPruneTool ()
void	SetPruneStrength (Double_t alpha)
Double_t	GetPruneStrength () const
void	SetAutomatic ()
Bool_t	IsAutomatic () const

Private Member Functions
void	FindListOfNodes (DecisionTreeNode *node)
	recursive pruning of nodes using the Expected Error Pruning (EEP) More...
Double_t	GetNodeError (DecisionTreeNode *node) const
	Calculate an UPPER limit on the error made by the classification done by this node. More...
Double_t	GetSubTreeError (DecisionTreeNode *node) const
	calculate the expected statistical error on the subtree below "node" which is used in the expected error pruning More...
Int_t	CountNodes (DecisionTreeNode *node, Int_t icount=0)
MsgLogger &	Log () const

Private Attributes
Double_t	fDeltaPruneStrength
Double_t	fNodePurityLimit
	the stepsize for optimizing the pruning strength parameter More...
std::vector< DecisionTreeNode * >	fPruneSequence
	the purity limit for labelling a terminal node as signal More...
MsgLogger *	fLogger
	the (optimal) prune sequence More...

Additional Inherited Members
Public Types inherited from TMVA::IPruneTool
typedef std::vector< const Event * >	EventSample
Protected Attributes inherited from TMVA::IPruneTool
Double_t	fPruneStrength
Double_t	S
	regularization parameter in pruning More...
Double_t	B

#include <TMVA/ExpectedErrorPruneTool.h>

Inheritance diagram for TMVA::ExpectedErrorPruneTool:

Collaboration diagram for TMVA::ExpectedErrorPruneTool:

Constructor & Destructor Documentation

TMVA::ExpectedErrorPruneTool::ExpectedErrorPruneTool

(

)

Definition at line 34 of file ExpectedErrorPruneTool.cxx.

TMVA::ExpectedErrorPruneTool::~ExpectedErrorPruneTool ( )

virtual

Definition at line 43 of file ExpectedErrorPruneTool.cxx.

Member Function Documentation

TMVA::PruningInfo * TMVA::ExpectedErrorPruneTool::CalculatePruningInfo ( DecisionTree *  dt, const IPruneTool::EventSample *  testEvents = NULL, Bool_t  isAutomatic = kFALSE  )

virtual

Implements TMVA::IPruneTool.

Definition at line 51 of file ExpectedErrorPruneTool.cxx.

Int_t TMVA::ExpectedErrorPruneTool::CountNodes ( DecisionTreeNode *  node, Int_t  icount = 0  )

inlineprivate

Definition at line 86 of file ExpectedErrorPruneTool.h.

void TMVA::ExpectedErrorPruneTool::FindListOfNodes ( DecisionTreeNode *  node )

private

recursive pruning of nodes using the Expected Error Pruning (EEP)

Definition at line 147 of file ExpectedErrorPruneTool.cxx.

Double_t TMVA::ExpectedErrorPruneTool::GetNodeError ( DecisionTreeNode *  node ) const

private

Calculate an UPPER limit on the error made by the classification done by this node.

If the S/S+B of the node is f, then according to the training sample, the error rate (fraction of misclassified events by this node) is (1-f) Now f has a statistical error according to the binomial distribution hence the error on f can be estimated (same error as the binomial error for efficency calculations ( sigma = sqrt(eff(1-eff)/nEvts ) )

Definition at line 190 of file ExpectedErrorPruneTool.cxx.

Double_t TMVA::ExpectedErrorPruneTool::GetSubTreeError ( DecisionTreeNode *  node ) const

private

calculate the expected statistical error on the subtree below "node" which is used in the expected error pruning

Definition at line 165 of file ExpectedErrorPruneTool.cxx.

MsgLogger& TMVA::ExpectedErrorPruneTool::Log ( ) const

inlineprivate

Definition at line 83 of file ExpectedErrorPruneTool.h.

void TMVA::ExpectedErrorPruneTool::SetPruneStrengthIncrement ( Double_t  dalpha )

inline

Definition at line 70 of file ExpectedErrorPruneTool.h.

Member Data Documentation

Double_t TMVA::ExpectedErrorPruneTool::fDeltaPruneStrength

private

Definition at line 78 of file ExpectedErrorPruneTool.h.

Referenced by SetPruneStrengthIncrement().

MsgLogger* TMVA::ExpectedErrorPruneTool::fLogger

mutableprivate

the (optimal) prune sequence

Definition at line 82 of file ExpectedErrorPruneTool.h.

Referenced by Log().

Double_t TMVA::ExpectedErrorPruneTool::fNodePurityLimit

private

the stepsize for optimizing the pruning strength parameter

Definition at line 79 of file ExpectedErrorPruneTool.h.

std::vector<DecisionTreeNode*> TMVA::ExpectedErrorPruneTool::fPruneSequence

private

the purity limit for labelling a terminal node as signal

Definition at line 80 of file ExpectedErrorPruneTool.h.

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

• tmva/tmva/inc/TMVA/ExpectedErrorPruneTool.h
• tmva/tmva/src/ExpectedErrorPruneTool.cxx