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Reference Guide
TActivationChooser.cxx
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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::TActivationChooser *
8 * Web : http://tmva.sourceforge.net *
9 * *
10 * Description: *
11 * Class for easily choosing activation functions. *
12 * *
13 * Authors (alphabetical): *
14 * Matt Jachowski <jachowski@stanford.edu> - Stanford University, USA *
15 * *
16 * Copyright (c) 2005: *
17 * CERN, Switzerland *
18 * *
19 * Redistribution and use in source and binary forms, with or without *
20 * modification, are permitted according to the terms listed in LICENSE *
21 * (http://tmva.sourceforge.net/LICENSE) *
22 **********************************************************************************/
23
24/*! \class TMVA::TActivationChooser
25\ingroup TMVA
26Class for easily choosing activation functions
27*/
28
30
31#include <vector>
32#include "TString.h"
33
34#include "TMVA/TActivation.h"
40#include "TMVA/MsgLogger.h"
41#include "TMVA/Types.h"
42
43
44////////////////////////////////////////////////////////////////////////////////
45/// Default constructor.
46
48 fLINEAR("linear"),
49 fSIGMOID("sigmoid"),
50 fTANH("tanh"),
51 fRELU("ReLU"),
52 fRADIAL("radial"),
53 fLogger( new MsgLogger("TActivationChooser") )
54{
55}
56
57////////////////////////////////////////////////////////////////////////////////
58/// Destructor.
59
61{
62 delete fLogger;
63}
64
65////////////////////////////////////////////////////////////////////////////////
66/// instantiate the correct activation object according to the
67/// type chosen (given as the enumeration type)
68
71{
72 switch (type) {
73 case kLinear: return new TActivationIdentity();
74 case kSigmoid: return new TActivationSigmoid();
75 case kTanh: return new TActivationTanh();
76 case kReLU: return new TActivationReLU();
77 case kRadial: return new TActivationRadial();
78 default:
79 Log() << kFATAL << "no Activation function of type " << type << " found" << Endl;
80 return 0;
81 }
82 return NULL;
83}
84
85////////////////////////////////////////////////////////////////////////////////
86/// instantiate the correct activation object according to the
87/// type chosen (given by a TString)
88
91{
92 if (type == fLINEAR) return CreateActivation(kLinear);
93 else if (type == fSIGMOID) return CreateActivation(kSigmoid);
94 else if (type == fTANH) return CreateActivation(kTanh);
95 else if (type == fRELU) return CreateActivation(kReLU);
96 else if (type == fRADIAL) return CreateActivation(kRadial);
97 else {
98 Log() << kFATAL << "no Activation function of type " << type << " found" << Endl;
99 return 0;
100 }
101}
102
103////////////////////////////////////////////////////////////////////////////////
104/// returns the names of all know activation functions
105
106std::vector<TString>*
108{
109 std::vector<TString>* names = new std::vector<TString>();
110 names->push_back(fLINEAR);
111 names->push_back(fSIGMOID);
112 names->push_back(fTANH);
113 names->push_back(fRELU);
114 names->push_back(fRADIAL);
115 return names;
116}
int type
Definition: TGX11.cxx:121
ostringstream derivative to redirect and format output
Definition: MsgLogger.h:57
std::vector< TString > * GetAllActivationNames() const
returns the names of all know activation functions
virtual ~TActivationChooser()
Destructor.
TActivationChooser()
Default constructor.
TActivation * CreateActivation(EActivationType type) const
instantiate the correct activation object according to the type chosen (given as the enumeration type...
Identity activation function for TNeuron.
Radial basis activation function for ANN.
Rectified Linear Unit activation function for TNeuron.
Sigmoid activation function for TNeuron.
Tanh activation function for ANN.
Interface for TNeuron activation function classes.
Definition: TActivation.h:42
@ kFATAL
Definition: Types.h:61
Basic string class.
Definition: TString.h:136
MsgLogger & Endl(MsgLogger &ml)
Definition: MsgLogger.h:148
Double_t Log(Double_t x)
Definition: TMath.h:710