ROOT   Reference Guide
TNeuronInputAbs.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::TNeuronInputAbs *
8 * Web : http://tmva.sourceforge.net *
9 * *
10 * Description: *
11 * TNeuron input calculator -- calculates the sum of the absolute values *
12 * of the weighted inputs *
13 * *
14 * Authors (alphabetical): *
15 * Matt Jachowski <jachowski@stanford.edu> - Stanford University, USA *
16 * *
17 * Copyright (c) 2005: *
18 * CERN, Switzerland *
19 * *
20 * Redistribution and use in source and binary forms, with or without *
21 * modification, are permitted according to the terms listed in LICENSE *
22 * (http://tmva.sourceforge.net/LICENSE) *
23 **********************************************************************************/
24
25
26#ifndef ROOT_TMVA_TNeuronInputAbs
27#define ROOT_TMVA_TNeuronInputAbs
28
29//////////////////////////////////////////////////////////////////////////
30// //
31// TNeuronInputAbs //
32// //
33// TNeuron input calculator -- calculates the sum of the absolute //
34// values of the weighted inputs //
35// //
36//////////////////////////////////////////////////////////////////////////
37
38#include "TMathBase.h"
39
40#include "TObject.h"
41#include "TString.h"
42
43#include "TMVA/TNeuronInput.h"
44
45#include "TMVA/TNeuron.h"
46
47namespace TMVA {
48
50
51 public:
52
54 virtual ~TNeuronInputAbs() {}
55
56 // calculate the input value for the neuron
57 Double_t GetInput( const TNeuron* neuron ) const {
58 if (neuron->IsInputNeuron()) return 0;
59 Double_t result = 0;
60 for (Int_t i=0; i < neuron->NumPreLinks(); i++)
61 result += TMath::Abs(neuron->PreLinkAt(i)->GetWeightedValue());
62 return result;
63 }
64
65 // name of the class
66 TString GetName() { return "Sum of weighted activations (absolute value)"; }
67
68 ClassDef(TNeuronInputAbs,0); // Calculates the sum of the absolute values of the weighted inputs
69 };
70
71} // namespace TMVA
72
73#endif
int Int_t
Definition: RtypesCore.h:41
double Double_t
Definition: RtypesCore.h:55
#define ClassDef(name, id)
Definition: Rtypes.h:326
TNeuron input calculator – calculates the sum of the absolute values of the weighted inputs.
Double_t GetInput(const TNeuron *neuron) const
Interface for TNeuron input calculation classes.
Definition: TNeuronInput.h:42
Neuron class used by TMVA artificial neural network methods.
Definition: TNeuron.h:49
Bool_t IsInputNeuron() const
Definition: TNeuron.h:116