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MisClassificationError.cxx
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1// @(#)root/tmva $Id$
2// Author: Andreas Hoecker, Joerg Stelzer, Helge Voss, Kai Voss
3
4/**********************************************************************************
5 * Project: TMVA - a Root-integrated toolkit for multivariate data analysis *
6 * Package: TMVA *
7 * Class : MisClassificationError *
8 * Web : http://tmva.sourceforge.net *
9 * *
10 * Description: Implementation of the MisClassificationError as separation *
11 * criterion: 1-max(p, 1-p) as
12 * *
13 * Authors (alphabetical): *
14 * Andreas Hoecker <Andreas.Hocker@cern.ch> - CERN, Switzerland *
15 * Helge Voss <Helge.Voss@cern.ch> - MPI-K Heidelberg, Germany *
16 * Kai Voss <Kai.Voss@cern.ch> - U. of Victoria, Canada *
17 * *
18 * Copyright (c) 2005: *
19 * CERN, Switzerland *
20 * U. of Victoria, Canada *
21 * Heidelberg U., Germany *
22 * *
23 * Redistribution and use in source and binary forms, with or without *
24 * modification, are permitted according to the terms listed in LICENSE *
25 * (http://tmva.sourceforge.net/LICENSE) *
26 **********************************************************************************/
27
28/*! \class TMVA::MisClassificationError
29\ingroup TMVA
30Implementation of the MisClassificationError as separation criterion
31*/
32
33
35
36#include "Rtypes.h"
37
39
40////////////////////////////////////////////////////////////////////////////////
41/// Misclassification error criterion: 1-max(p, 1-p) (p: purity= s/(s+b))
42
44{
45 if ( s+b <= 0) return 0;
46
47 Double_t p = s/(s+b);
48 if (p >= 1-p) return 1-p;
49 else return p;
50}
51
52
#define b(i)
Definition RSha256.hxx:100
double Double_t
Definition RtypesCore.h:59
#define ClassImp(name)
Definition Rtypes.h:364
Implementation of the MisClassificationError as separation criterion.
virtual Double_t GetSeparationIndex(const Double_t s, const Double_t b)
Misclassification error criterion: 1-max(p, 1-p) (p: purity= s/(s+b))