Implementation of the SdivSqrtSplusB as separation criterion.

\( Index = \frac{S}{\sqrt{S+B}} \) (statistical significance)

Definition at line 44 of file SdivSqrtSplusB.h.

Public Member Functions
	SdivSqrtSplusB ()

	SdivSqrtSplusB (const SdivSqrtSplusB &g)

virtual	~SdivSqrtSplusB ()

virtual Double_t	GetSeparationGain (const Double_t nSelS, const Double_t nSelB, const Double_t nTotS, const Double_t nTotB)
	Separation Gain: the measure of how the quality of separation of the sample increases by splitting the sample e.g.

virtual Double_t	GetSeparationIndex (const Double_t s, const Double_t b)
	Index = S/sqrt(S+B) (statistical significance)

Public Member Functions inherited from TMVA::SeparationBase
	SeparationBase ()
	Constructor.

	SeparationBase (const SeparationBase &s)
	Copy constructor.

virtual	~SeparationBase ()

const TString &	GetName ()

Additional Inherited Members
Protected Attributes inherited from TMVA::SeparationBase
TString	fName

Double_t	fPrecisionCut

#include <TMVA/SdivSqrtSplusB.h>

Inheritance diagram for TMVA::SdivSqrtSplusB:

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Constructor & Destructor Documentation

◆ SdivSqrtSplusB() [1/2]

TMVA::SdivSqrtSplusB::SdivSqrtSplusB ( )

inline

Definition at line 49 of file SdivSqrtSplusB.h.

◆ SdivSqrtSplusB() [2/2]

TMVA::SdivSqrtSplusB::SdivSqrtSplusB ( const SdivSqrtSplusB & g )

inline

Definition at line 52 of file SdivSqrtSplusB.h.

◆ ~SdivSqrtSplusB()

virtual TMVA::SdivSqrtSplusB::~SdivSqrtSplusB ( )

inlinevirtual

Definition at line 55 of file SdivSqrtSplusB.h.

Member Function Documentation

◆ GetSeparationGain()

Double_t TMVA::SdivSqrtSplusB::GetSeparationGain	(	const Double_t	nSelS,
		const Double_t	nSelB,
		const Double_t	nTotS,
		const Double_t	nTotB
	)

virtual

Separation Gain: the measure of how the quality of separation of the sample increases by splitting the sample e.g.

into a "left-node" and a "right-node" (N * Index_parent) - (N_left * Index_left) - (N_right * Index_right) this is then the quality criterion which is optimized for when trying to increase the information in the system (making the best selection

Reimplemented from TMVA::SeparationBase.

Definition at line 58 of file SdivSqrtSplusB.cxx.