Logo ROOT  

Reference Guide
Loading...
Searching...
No Matches
TMVA::CrossEntropy Class Reference
TMVA

Implementation of the CrossEntropy as separation criterion. 

         -p log (p) - (1-p)log(1-p);     p=purity

Definition at line 43 of file CrossEntropy.h.

Public Member Functions

 CrossEntropy ()
 CrossEntropy (const CrossEntropy &g)
virtual ~CrossEntropy ()
const TString & GetName ()
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.
Double_t GetSeparationIndex (const Double_t s, const Double_t b) override
 Cross Entropy defined as:
TClass * IsA () const override
void Streamer (TBuffer &) override
void StreamerNVirtual (TBuffer &ClassDef_StreamerNVirtual_b)

Static Public Member Functions

static TClass * Class ()
static const char * Class_Name ()
static constexpr Version_t Class_Version ()
static const char * DeclFileName ()

Protected Attributes

TString fName
Double_t fPrecisionCut

#include <TMVA/CrossEntropy.h>

Inheritance diagram for TMVA::CrossEntropy:
TMVA::SeparationBase

Constructor & Destructor Documentation

◆ CrossEntropy() [1/2]

TMVA::CrossEntropy::CrossEntropy ( )
inline

Definition at line 48 of file CrossEntropy.h.

◆ CrossEntropy() [2/2]

TMVA::CrossEntropy::CrossEntropy ( const CrossEntropy & g)
inline

Definition at line 51 of file CrossEntropy.h.

◆ ~CrossEntropy()

virtual TMVA::CrossEntropy::~CrossEntropy ( )
inlinevirtual

Definition at line 54 of file CrossEntropy.h.

Member Function Documentation

◆ Class()

TClass * TMVA::CrossEntropy::Class ( )
static
Returns
TClass describing this class

◆ Class_Name()

const char * TMVA::CrossEntropy::Class_Name ( )
static
Returns
Name of this class

◆ Class_Version()

constexpr Version_t TMVA::CrossEntropy::Class_Version ( )
inlinestaticconstexpr
Returns
Version of this class

Definition at line 61 of file CrossEntropy.h.

◆ DeclFileName()

const char * TMVA::CrossEntropy::DeclFileName ( )
inlinestatic
Returns
Name of the file containing the class declaration

Definition at line 61 of file CrossEntropy.h.

◆ GetName()

const TString & TMVA::SeparationBase::GetName ( )
inlineinherited

Definition at line 104 of file SeparationBase.h.

◆ GetSeparationGain()

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

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 in TMVA::SdivSqrtSplusB.

Definition at line 100 of file SeparationBase.cxx.

◆ GetSeparationIndex()

Double_t TMVA::CrossEntropy::GetSeparationIndex ( const Double_t s,
const Double_t b )
overridevirtual

Cross Entropy defined as: 

       -p log (p) - (1-p)log(1-p);     p=purity = s/(s+b)

Implements TMVA::SeparationBase.

Definition at line 46 of file CrossEntropy.cxx.

◆ IsA()

TClass * TMVA::CrossEntropy::IsA ( ) const
inlineoverridevirtual
Returns
TClass describing current object

Reimplemented from TMVA::SeparationBase.

Definition at line 61 of file CrossEntropy.h.

◆ Streamer()

void TMVA::CrossEntropy::Streamer ( TBuffer & )
overridevirtual

Reimplemented from TMVA::SeparationBase.

◆ StreamerNVirtual()

void TMVA::CrossEntropy::StreamerNVirtual ( TBuffer & ClassDef_StreamerNVirtual_b)
inline

Definition at line 61 of file CrossEntropy.h.

Member Data Documentation

◆ fName

TString TMVA::SeparationBase::fName
protectedinherited

Definition at line 108 of file SeparationBase.h.

◆ fPrecisionCut

Double_t TMVA::SeparationBase::fPrecisionCut
protectedinherited

Definition at line 110 of file SeparationBase.h.

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