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CrossEntropy.h
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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 : CrossEntropy *
8  * Web : http://tmva.sourceforge.net *
9  * *
10  * Description: Implementation of the CrossEntropy as separation criterion *
11  * *
12  * Authors (alphabetical): *
13  * Andreas Hoecker <Andreas.Hocker@cern.ch> - CERN, Switzerland *
14  * Helge Voss <Helge.Voss@cern.ch> - MPI-K Heidelberg, Germany *
15  * Kai Voss <Kai.Voss@cern.ch> - U. of Victoria, Canada *
16  * *
17  * Copyright (c) 2005: *
18  * CERN, Switzerland *
19  * U. of Victoria, Canada *
20  * Heidelberg U., Germany *
21  * *
22  * Redistribution and use in source and binary forms, with or without *
23  * modification, are permitted according to the terms listed in LICENSE *
24  * (http://tmva.sourceforge.net/LICENSE) *
25  **********************************************************************************/
26 
27 #ifndef ROOT_TMVA_CrossEntropy
28 #define ROOT_TMVA_CrossEntropy
29 
30 //////////////////////////////////////////////////////////////////////////
31 // //
32 // CrossEntropy //
33 // //
34 // Implementation of the CrossEntropy as separation criterion //
35 // -p log (p) - (1-p)log(1-p); p=purity = s/(s+b) //
36 // //
37 //////////////////////////////////////////////////////////////////////////
38 
39 #ifndef ROOT_TMVA_SeparationBase
40 #include "TMVA/SeparationBase.h"
41 #endif
42 
43 namespace TMVA {
44 
45  class CrossEntropy : public SeparationBase {
46 
47  public:
48 
49  // default constructor
51 
52  // copy constructor
54 
55  // destructor
56  virtual ~CrossEntropy(){}
57 
58  // return the separation Index -p log (p) - (1-p)log(1-p); p=purity = s/(s+b)
59  virtual Double_t GetSeparationIndex( const Double_t &s, const Double_t &b );
60 
61  protected:
62 
63  ClassDef(CrossEntropy,0) // Implementation of the CrossEntropy as separation criterion
64  };
65 
66 } // namespace TMVA
67 
68 #endif
69 
virtual ~CrossEntropy()
Definition: CrossEntropy.h:56
#define ClassDef(name, id)
Definition: Rtypes.h:254
double Double_t
Definition: RtypesCore.h:55
CrossEntropy(const CrossEntropy &g)
Definition: CrossEntropy.h:53
virtual Double_t GetSeparationIndex(const Double_t &s, const Double_t &b)