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TActivation.h
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1// @(#)root/tmva $Id$
2// Author: Matt Jachowski
3
4/**********************************************************************************
5 * Project: TMVA - a Root-integrated toolkit for multivariate data analysis *
6 * Package: TMVA *
7 * Class : TMVA::TActivation *
8 * *
9 * Description: *
10 * Interface for TNeuron activation function classes. *
11 * *
12 * Authors (alphabetical): *
13 * Matt Jachowski <jachowski@stanford.edu> - Stanford University, USA *
14 * *
15 * Copyright (c) 2005: *
16 * CERN, Switzerland *
17 * *
18 * Redistribution and use in source and binary forms, with or without *
19 * modification, are permitted according to the terms listed in LICENSE *
20 * (http://tmva.sourceforge.net/LICENSE) *
21 **********************************************************************************/
22
23
24#ifndef ROOT_TMVA_TActivation
25#define ROOT_TMVA_TActivation
26
27//////////////////////////////////////////////////////////////////////////
28// //
29// TActivation //
30// //
31// Interface for TNeuron activation function classes //
32// //
33//////////////////////////////////////////////////////////////////////////
34
35#include <iosfwd>
36
37#include "Rtypes.h"
38#include "TString.h"
39
40namespace TMVA {
41
43
44 public:
45
47 virtual ~TActivation() {}
48
49 // evaluate the activation function
50 virtual Double_t Eval(Double_t arg) = 0;
51
52 // evaluate the derivative of the activation function
54
55 // minimum of the range of activation function
56 virtual Double_t GetMin() = 0;
57
58 // maximum of the range of the activation function
59 virtual Double_t GetMax() = 0;
60
61 // expression for activation function
62 virtual TString GetExpression() = 0;
63
64 // writer of function code
65 virtual void MakeFunction(std::ostream& fout, const TString& fncName) = 0;
66
67 ClassDef(TActivation,0); // Interface for TNeuron activation function classes
68
69 };
70
71} // namespace TMVA
72
73#endif
double Double_t
Definition: RtypesCore.h:59
#define ClassDef(name, id)
Definition: Rtypes.h:325
Interface for TNeuron activation function classes.
Definition: TActivation.h:42
virtual TString GetExpression()=0
virtual Double_t GetMax()=0
virtual Double_t GetMin()=0
virtual void MakeFunction(std::ostream &fout, const TString &fncName)=0
virtual Double_t Eval(Double_t arg)=0
virtual Double_t EvalDerivative(Double_t arg)=0
virtual ~TActivation()
Definition: TActivation.h:47
Basic string class.
Definition: TString.h:136
create variable transformations