TMVA::TActivationSigmoid Class Reference

Sigmoid activation function for TNeuron.

This really simple implementation uses TFormula and should probably be replaced with something more efficient later.

Definition at line 42 of file TActivationSigmoid.h.

Public Member Functions
	TActivationSigmoid ()
	constructor for sigmoid normalized in [0,1] More...
	~TActivationSigmoid ()
	destructor More...
Double_t	Eval (Double_t arg)
	evaluate the sigmoid More...
Double_t	EvalDerivative (Double_t arg)
	evaluate the derivative of the sigmoid More...
TString	GetExpression ()
	get expressions for the sigmoid and its derivatives More...
Double_t	GetMax ()
Double_t	GetMin ()
virtual void	MakeFunction (std::ostream &fout, const TString &fncName)
	writes the sigmoid activation function source code More...
Public Member Functions inherited from TMVA::TActivation
	TActivation ()
virtual	~TActivation ()

Private Attributes
TFormula *	fEqn
TFormula *	fEqnDerivative

#include <TMVA/TActivationSigmoid.h>

Inheritance diagram for TMVA::TActivationSigmoid:

Constructor & Destructor Documentation

TActivationSigmoid()

TMVA::TActivationSigmoid::TActivationSigmoid

(

)

constructor for sigmoid normalized in [0,1]

Definition at line 48 of file TActivationSigmoid.cxx.

~TActivationSigmoid()

TMVA::TActivationSigmoid::~TActivationSigmoid

(

)

destructor

Definition at line 58 of file TActivationSigmoid.cxx.

Member Function Documentation

Eval()

Double_t TMVA::TActivationSigmoid::Eval ( Double_t  arg )

virtual

evaluate the sigmoid

Implements TMVA::TActivation.

Definition at line 67 of file TActivationSigmoid.cxx.

EvalDerivative()

Double_t TMVA::TActivationSigmoid::EvalDerivative ( Double_t  arg )

virtual

evaluate the derivative of the sigmoid

Implements TMVA::TActivation.

Definition at line 78 of file TActivationSigmoid.cxx.

GetExpression()

TString TMVA::TActivationSigmoid::GetExpression ( )

virtual

get expressions for the sigmoid and its derivatives

Implements TMVA::TActivation.

Definition at line 89 of file TActivationSigmoid.cxx.

GetMax()

Double_t TMVA::TActivationSigmoid::GetMax ( )

inlinevirtual

Implements TMVA::TActivation.

Definition at line 59 of file TActivationSigmoid.h.

GetMin()

Double_t TMVA::TActivationSigmoid::GetMin ( )

inlinevirtual

Implements TMVA::TActivation.

Definition at line 56 of file TActivationSigmoid.h.

MakeFunction()

void TMVA::TActivationSigmoid::MakeFunction ( std::ostream &  fout, const TString &  fncName  )

virtual

writes the sigmoid activation function source code

Implements TMVA::TActivation.

Definition at line 107 of file TActivationSigmoid.cxx.

Member Data Documentation

fEqn

TFormula* TMVA::TActivationSigmoid::fEqn

private

Definition at line 69 of file TActivationSigmoid.h.

fEqnDerivative

TFormula* TMVA::TActivationSigmoid::fEqnDerivative

private

Definition at line 70 of file TActivationSigmoid.h.

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The documentation for this class was generated from the following files:

• tmva/tmva/inc/TMVA/TActivationSigmoid.h
• tmva/tmva/src/TActivationSigmoid.cxx