library: libTMVA
#include "SeparationBase.h"

TMVA::SeparationBase


class description - header file - source file
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class TMVA::SeparationBase

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    This is an abstract class, constructors will not be documented.
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public:
virtual~SeparationBase()
static TClass*Class()
TStringGetName()
Double_tGetSeparationGain(const Double_t& nSelS, const Double_t& nSelB, const Double_t& nTotS, const Double_t& nTotB)
virtual Double_tGetSeparationIndex(const Double_t& s, const Double_t& b)
virtual TClass*IsA() const
TMVA::SeparationBase&operator=(const TMVA::SeparationBase&)
virtual voidShowMembers(TMemberInspector& insp, char* parent)
virtual voidStreamer(TBuffer& b)
voidStreamerNVirtual(TBuffer& b)

Data Members

protected:
TStringfNamename of the concrete Separation Index impementation

Class Description

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. into a "left-node" and a "right-node"   
 (N * Index_parent) - (N_left * Index_left) - (N_right * Index_right) 
 this is then the quality crition which is optimized for when trying  
 to increase the information in the system (making the best selection             
virtual ~SeparationBase()
 destructor
{}
Double_t GetSeparationIndex( const Double_t &s, const Double_t &b )
 Return the separation index (a measure for "purity" of the sample")
TString GetName()
 Return the name of the concrete Index implementation
{ return fName; }

Author: Andreas Hoecker, Joerg Stelzer, Helge Voss
Last update: root/tmva $Id: SeparationBase.cxx,v 1.9 2006/11/20 15:35:28 brun Exp $
Copyright (c) 2005: *


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