library: libTMVA
#include "TActivationSigmoid.h"

TMVA::TActivationSigmoid

class description - header file - source file
viewCVS header - viewCVS source

class TMVA::TActivationSigmoid: public TMVA::TActivation

Inheritance Inherited Members Includes Libraries
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Function Members (Methods)

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public:
~TActivationSigmoid()
static TClass*Class()
virtual Double_tEval(Double_t arg)
virtual Double_tEvalDerivative(Double_t arg)
virtual TStringGetExpression()
virtual Double_tGetMax()
virtual Double_tGetMin()
virtual TClass*IsA() const
TMVA::TActivationSigmoid&operator=(const TMVA::TActivationSigmoid&)
virtual voidShowMembers(TMemberInspector& insp, char* parent)
virtual voidStreamer(TBuffer& b)
voidStreamerNVirtual(TBuffer& b)
TMVA::TActivationSigmoidTActivationSigmoid()
TMVA::TActivationSigmoidTActivationSigmoid(const TMVA::TActivationSigmoid&)

Data Members

private:
TFormula*fEqnequation of sigmoid
TFormula*fEqnDerivativeequation of sigmoid derivative

Class Description

                                                                      
  Sigmoid activation function for TNeuron. This really simple implementation
  uses TFormulas and should probably be replaced with something more
  efficient later.
                                                                      
_______________________________________________________________________
TActivationSigmoid()
 constructor for sigmoid normalized in [0,1]
~TActivationSigmoid()
 destructor
Double_t Eval(Double_t arg)
 evaluate the sigmoid
Double_t EvalDerivative(Double_t arg)
 evaluate the derivative of the sigmoid
TString GetExpression()
 get expressions for the sigmoid and its derivatives
TActivationSigmoid()
Double_t GetMin()
 minimum of the range of the activation function
{ return 0; }
Double_t GetMax()
 maximum of the range of the activation function
{ return 1; }

Author: Matt Jachowski
Last update: root/tmva $Id: TActivationSigmoid.cxx,v 1.6 2006/11/20 15:35:28 brun Exp $
Copyright (c) 2005: *

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