Revision 180edf636855cd63af5828d752ae1d73caaf12a9 authored by Rene Brun on 19 September 2006, 12:38:03 UTC, committed by Rene Brun on 19 September 2006, 12:38:03 UTC
git-svn-id: http://root.cern.ch/svn/root/trunk@16296 27541ba8-7e3a-0410-8455-c3a389f83636
1 parent 829e8d8
MisClassificationError.cxx
// @(#)root/tmva $Id: MisClassificationError.cxx,v 1.5 2006/05/23 09:53:10 stelzer Exp $
// Author: Andreas Hoecker, Joerg Stelzer, Helge Voss, Kai Voss
/**********************************************************************************
* Project: TMVA - a Root-integrated toolkit for multivariate data analysis *
* Package: TMVA *
* Class : TMVA::MisClassificationError *
* *
* Description: Implementation of the MisClassificationError as separation *
* criterion: 1-max(p, 1-p) as
* *
* *
* Authors (alphabetical): *
* Andreas Hoecker <Andreas.Hocker@cern.ch> - CERN, Switzerland *
* Xavier Prudent <prudent@lapp.in2p3.fr> - LAPP, France *
* Helge Voss <Helge.Voss@cern.ch> - MPI-KP Heidelberg, Germany *
* Kai Voss <Kai.Voss@cern.ch> - U. of Victoria, Canada *
* *
* Copyright (c) 2005: *
* CERN, Switzerland, *
* U. of Victoria, Canada, *
* Heidelberg U., Germany, *
* LAPP, Annecy, France *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted according to the terms listed in LICENSE *
* (http://mva.sourceforge.net/license.txt) *
* *
**********************************************************************************/
//_______________________________________________________________________
//
// Implementation of the MisClassificationError as separation criterion
//
//_______________________________________________________________________
#include "TMVA/MisClassificationError.h"
ClassImp(TMVA::MisClassificationError)
//_______________________________________________________________________
Double_t TMVA::MisClassificationError::GetSeparationIndex( const Double_t &s, const Double_t &b )
{
// Misclassifiacton error criterion: 1-max(p, 1-p) (p: purity= s/(s+b))
if ( s+b <= 0) return 0;
Double_t p = s/(s+b);
if (p < 1-p) return 1-p;
else return p;
//return std::max(p, 1-p);
}
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