ROOT » TMVA » TMVA::SdivSqrtSplusB

class TMVA::SdivSqrtSplusB: public TMVA::SeparationBase

Function Members (Methods)

Data Members

TStringTMVA::SeparationBase::fNamename of the concrete Separation Index impementation

Class Charts

Inheritance Inherited Members Includes Libraries
Class Charts

Function documentation

Double_t GetSeparationIndex(const Double_t& s, const Double_t& b)
 Index = S/sqrt(S+B)  (statistical significance)
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
constructor for the "statistical significance" index
{ fName = "StatSig"; }
SdivSqrtSplusB(const TMVA::SdivSqrtSplusB& g)
 copy constructor
virtual ~SdivSqrtSplusB()