Definition at line 44 of file TNeuron.h.

Public Types
enum	ENeuronType { kOff, kLinear, kSigmoid, kTanh, kGauss, kSoftmax, kExternal }

Public Types inherited from TObject
enum	{ kIsOnHeap = 0x01000000, kNotDeleted = 0x02000000, kZombie = 0x04000000, kBitMask = 0x00ffffff }

enum	{ kSingleKey = BIT(0), kOverwrite = BIT(1), kWriteDelete = BIT(2) }

enum	EStatusBits { kCanDelete = BIT(0), kMustCleanup = BIT(3), kObjInCanvas = BIT(3), kIsReferenced = BIT(4), kHasUUID = BIT(5), kCannotPick = BIT(6), kNoContextMenu = BIT(8), kInvalidObject = BIT(13) }

Public Member Functions
	TNeuron (ENeuronType type=kSigmoid, const char name="", const char title="", const char extF="", const char extD="")
	Usual constructor. More...

virtual	~TNeuron ()

void	AddInLayer (TNeuron *)
	Tells a neuron which neurons form its layer (including itself). More...

void	ForceExternalValue (Double_t value)
	Uses the branch type to force an external value. More...

Double_t	GetBranch () const
	Returns the formula value. More...

Double_t	GetDeDw () const
	Computes the derivative of the error wrt the neuron weight. More...

Double_t	GetDEDw () const

Double_t	GetDerivative () const
	computes the derivative for the appropriate function at the working point More...

Double_t	GetError () const
	Computes the error for output neurons. More...

TNeuron *	GetInLayer (Int_t n) const

Double_t	GetInput () const
	Returns neuron input. More...

const Double_t *	GetNormalisation () const

TSynapse *	GetPost (Int_t n) const

TSynapse *	GetPre (Int_t n) const

Double_t	GetTarget () const
	Computes the normalized target pattern for output neurons. More...

ENeuronType	GetType () const
	Returns the neuron type. More...

Double_t	GetValue () const
	Computes the output using the appropriate function and all the weighted inputs, or uses the branch as input. More...

Double_t	GetWeight () const

void	SetDEDw (Double_t in)
	Sets the derivative of the total error wrt the neuron weight. More...

void	SetNewEvent () const
	Inform the neuron that inputs of the network have changed, so that the buffered values have to be recomputed. More...

void	SetNormalisation (Double_t mean, Double_t RMS)
	Sets the normalization variables. More...

void	SetWeight (Double_t w)
	Sets the neuron weight to w. More...

TTreeFormula *	UseBranch (TTree , const char )
	Sets a formula that can be used to make the neuron an input. More...

Public Member Functions inherited from TNamed
	TNamed ()

	TNamed (const char name, const char title)

	TNamed (const TString &name, const TString &title)

	TNamed (const TNamed &named)
	TNamed copy ctor. More...

virtual	~TNamed ()

virtual void	Clear (Option_t *option="")
	Set name and title to empty strings (""). More...

virtual TObject *	Clone (const char *newname="") const
	Make a clone of an object using the Streamer facility. More...

virtual Int_t	Compare (const TObject *obj) const
	Compare two TNamed objects. More...

virtual void	Copy (TObject &named) const
	Copy this to obj. More...

virtual void	FillBuffer (char *&buffer)
	Encode TNamed into output buffer. More...

virtual const char *	GetName () const
	Returns name of object. More...

virtual const char *	GetTitle () const
	Returns title of object. More...

virtual ULong_t	Hash () const
	Return hash value for this object. More...

virtual Bool_t	IsSortable () const

virtual void	ls (Option_t *option="") const
	List TNamed name and title. More...

TNamed &	operator= (const TNamed &rhs)
	TNamed assignment operator. More...

virtual void	Print (Option_t *option="") const
	Print TNamed name and title. More...

virtual void	SetName (const char *name)
	Set the name of the TNamed. More...

virtual void	SetNameTitle (const char name, const char title)
	Set all the TNamed parameters (name and title). More...

virtual void	SetTitle (const char *title="")
	Set the title of the TNamed. More...

virtual Int_t	Sizeof () const
	Return size of the TNamed part of the TObject. More...

Public Member Functions inherited from TObject
	TObject ()
	TObject constructor. More...

	TObject (const TObject &object)
	TObject copy ctor. More...

virtual	~TObject ()
	TObject destructor. More...

void	AbstractMethod (const char *method) const
	Use this method to implement an "abstract" method that you don't want to leave purely abstract. More...

virtual void	AppendPad (Option_t *option="")
	Append graphics object to current pad. More...

virtual void	Browse (TBrowser *b)
	Browse object. May be overridden for another default action. More...

virtual const char *	ClassName () const
	Returns name of class to which the object belongs. More...

virtual void	Delete (Option_t *option="")
	Delete this object. More...

virtual Int_t	DistancetoPrimitive (Int_t px, Int_t py)
	Computes distance from point (px,py) to the object. More...

virtual void	Draw (Option_t *option="")
	Default Draw method for all objects. More...

virtual void	DrawClass () const
	Draw class inheritance tree of the class to which this object belongs. More...

virtual TObject *	DrawClone (Option_t *option="") const
	Draw a clone of this object in the current selected pad for instance with: `gROOT->SetSelectedPad(gPad)`. More...

virtual void	Dump () const
	Dump contents of object on stdout. More...

virtual void	Error (const char method, const char msgfmt,...) const
	Issue error message. More...

virtual void	Execute (const char method, const char params, Int_t *error=0)
	Execute method on this object with the given parameter string, e.g. More...

virtual void	Execute (TMethod method, TObjArray params, Int_t *error=0)
	Execute method on this object with parameters stored in the TObjArray. More...

virtual void	ExecuteEvent (Int_t event, Int_t px, Int_t py)
	Execute action corresponding to an event at (px,py). More...

virtual void	Fatal (const char method, const char msgfmt,...) const
	Issue fatal error message. More...

virtual TObject *	FindObject (const char *name) const
	Must be redefined in derived classes. More...

virtual TObject *	FindObject (const TObject *obj) const
	Must be redefined in derived classes. More...

virtual Option_t *	GetDrawOption () const
	Get option used by the graphics system to draw this object. More...

virtual const char *	GetIconName () const
	Returns mime type name of object. More...

virtual char *	GetObjectInfo (Int_t px, Int_t py) const
	Returns string containing info about the object at position (px,py). More...

virtual Option_t *	GetOption () const

virtual UInt_t	GetUniqueID () const
	Return the unique object id. More...

virtual Bool_t	HandleTimer (TTimer *timer)
	Execute action in response of a timer timing out. More...

virtual void	Info (const char method, const char msgfmt,...) const
	Issue info message. More...

virtual Bool_t	InheritsFrom (const char *classname) const
	Returns kTRUE if object inherits from class "classname". More...

virtual Bool_t	InheritsFrom (const TClass *cl) const
	Returns kTRUE if object inherits from TClass cl. More...

virtual void	Inspect () const
	Dump contents of this object in a graphics canvas. More...

void	InvertBit (UInt_t f)

virtual Bool_t	IsEqual (const TObject *obj) const
	Default equal comparison (objects are equal if they have the same address in memory). More...

virtual Bool_t	IsFolder () const
	Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). More...

Bool_t	IsOnHeap () const

Bool_t	IsZombie () const

void	MayNotUse (const char *method) const
	Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). More...

virtual Bool_t	Notify ()
	This method must be overridden to handle object notification. More...

void	Obsolete (const char method, const char asOfVers, const char *removedFromVers) const
	Use this method to declare a method obsolete. More...

void	operator delete (void *ptr)
	Operator delete. More...

void	operator delete[] (void *ptr)
	Operator delete []. More...

void *	operator new (size_t sz)

void *	operator new (size_t sz, void *vp)

void *	operator new[] (size_t sz)

void *	operator new[] (size_t sz, void *vp)

TObject &	operator= (const TObject &rhs)
	TObject assignment operator. More...

virtual void	Paint (Option_t *option="")
	This method must be overridden if a class wants to paint itself. More...

virtual void	Pop ()
	Pop on object drawn in a pad to the top of the display list. More...

virtual Int_t	Read (const char *name)
	Read contents of object with specified name from the current directory. More...

virtual void	RecursiveRemove (TObject *obj)
	Recursively remove this object from a list. More...

void	ResetBit (UInt_t f)

virtual void	SaveAs (const char filename="", Option_t option="") const
	Save this object in the file specified by filename. More...

virtual void	SavePrimitive (std::ostream &out, Option_t *option="")
	Save a primitive as a C++ statement(s) on output stream "out". More...

void	SetBit (UInt_t f, Bool_t set)
	Set or unset the user status bits as specified in f. More...

void	SetBit (UInt_t f)

virtual void	SetDrawOption (Option_t *option="")
	Set drawing option for object. More...

virtual void	SetUniqueID (UInt_t uid)
	Set the unique object id. More...

virtual void	SysError (const char method, const char msgfmt,...) const
	Issue system error message. More...

Bool_t	TestBit (UInt_t f) const

Int_t	TestBits (UInt_t f) const

virtual void	UseCurrentStyle ()
	Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. More...

virtual void	Warning (const char method, const char msgfmt,...) const
	Issue warning message. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0)
	Write this object to the current directory. More...

virtual Int_t	Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const
	Write this object to the current directory. More...

Protected Member Functions
void	AddPost (TSynapse *)
	Adds a synapse to the neuron as an output This method is used by the TSynapse while connecting two neurons. More...

void	AddPre (TSynapse *)
	Adds a synapse to the neuron as an input This method is used by the TSynapse while connecting two neurons. More...

Double_t	DSigmoid (Double_t x) const
	The Derivative of the Sigmoid. More...

Double_t	Sigmoid (Double_t x) const
	The Sigmoid. More...

Protected Member Functions inherited from TObject
virtual void	DoError (int level, const char location, const char fmt, va_list va) const
	Interface to ErrorHandler (protected). More...

void	MakeZombie ()

Private Member Functions
	TNeuron (const TNeuron &)

TNeuron &	operator= (const TNeuron &)

Private Attributes
Double_t	fDeDw
	do we need to compute fDeDw again ? More...

Double_t	fDEDw
	buffer containing the last derivative of the error More...

Double_t	fDerivative
	do we need to compute fDerivative again ? More...

TFormula *	fExtD

TFormula *	fExtF

TTreeFormula *	fFormula

Int_t	fIndex
	formula to be used for inputs and outputs More...

Double_t	fInput
	do we need to compute fInput again ? More...

TObjArray	flayer

Bool_t	fNewDeDw
	buffer containing the last neuron derivative More...

Bool_t	fNewDeriv
	buffer containing the last neuron output More...

Bool_t	fNewInput
	index in the formula More...

Bool_t	fNewValue
	buffer containing the last neuron input More...

Double_t	fNorm [2]

TObjArray	fpost

TObjArray	fpre

ENeuronType	fType

Double_t	fValue
	do we need to compute fValue again ? More...

Double_t	fWeight

Friends
class	TSynapse

Additional Inherited Members
Static Public Member Functions inherited from TObject
static Long_t	GetDtorOnly ()
	Return destructor only flag. More...

static Bool_t	GetObjectStat ()
	Get status of object stat flag. More...

static void	SetDtorOnly (void *obj)
	Set destructor only flag. More...

static void	SetObjectStat (Bool_t stat)
	Turn on/off tracking of objects in the TObjectTable. More...

Protected Attributes inherited from TNamed
TString	fName

TString	fTitle

#include <TMVA/TNeuron.h>

Inheritance diagram for TNeuron:

[legend]

Member Enumeration Documentation

◆ ENeuronType

enum TNeuron::ENeuronType

Enumerator
kOff
kLinear
kSigmoid
kTanh
kGauss
kSoftmax
kExternal

Definition at line 48 of file TNeuron.h.

Constructor & Destructor Documentation

◆ TNeuron() [1/2]

TNeuron::TNeuron	(	TNeuron::ENeuronType	type = `kSigmoid`,
		const char *	name = `""`,
		const char *	title = `""`,
		const char *	extF = `""`,
		const char *	extD = `""`
	)

Usual constructor.

Definition at line 51 of file TNeuron.cxx.

◆ ~TNeuron()

virtual TNeuron::~TNeuron ( )

inlinevirtual

Definition at line 53 of file TNeuron.h.

◆ TNeuron() [2/2]

TNeuron::TNeuron ( const TNeuron & )

private

Member Function Documentation

◆ AddInLayer()

void TNeuron::AddInLayer ( TNeuron * nearP )

Tells a neuron which neurons form its layer (including itself).

This is needed for self-normalizing functions, like Softmax.

Definition at line 857 of file TNeuron.cxx.

◆ AddPost()

void TNeuron::AddPost ( TSynapse * post )

protected

Adds a synapse to the neuron as an output This method is used by the TSynapse while connecting two neurons.

Definition at line 846 of file TNeuron.cxx.

◆ AddPre()

void TNeuron::AddPre ( TSynapse * pre )

protected

Adds a synapse to the neuron as an input This method is used by the TSynapse while connecting two neurons.

Definition at line 834 of file TNeuron.cxx.

◆ DSigmoid()

Double_t TNeuron::DSigmoid ( Double_t x ) const

protected

The Derivative of the Sigmoid.

Definition at line 818 of file TNeuron.cxx.

◆ ForceExternalValue()

void TNeuron::ForceExternalValue ( Double_t value )

Uses the branch type to force an external value.

Definition at line 1125 of file TNeuron.cxx.

◆ GetBranch()

Double_t TNeuron::GetBranch ( ) const

Returns the formula value.

Definition at line 914 of file TNeuron.cxx.

◆ GetDeDw()

Double_t TNeuron::GetDeDw ( ) const

Computes the derivative of the error wrt the neuron weight.

Definition at line 1084 of file TNeuron.cxx.

◆ GetDEDw()

Double_t TNeuron::GetDEDw ( ) const

inline

Definition at line 72 of file TNeuron.h.

◆ GetDerivative()

Double_t TNeuron::GetDerivative ( ) const

computes the derivative for the appropriate function at the working point

Definition at line 1011 of file TNeuron.cxx.

◆ GetError()

Double_t TNeuron::GetError ( ) const

Computes the error for output neurons.

Returns 0 for other neurons.

Definition at line 1063 of file TNeuron.cxx.

◆ GetInLayer()

TNeuron* TNeuron::GetInLayer ( Int_t n ) const

inline

Definition at line 56 of file TNeuron.h.

◆ GetInput()

Double_t TNeuron::GetInput ( ) const

Returns neuron input.

Definition at line 925 of file TNeuron.cxx.

◆ GetNormalisation()

const Double_t* TNeuron::GetNormalisation ( ) const

inline

Definition at line 69 of file TNeuron.h.

◆ GetPost()

TSynapse* TNeuron::GetPost ( Int_t n ) const

inline

Definition at line 55 of file TNeuron.h.

◆ GetPre()

TSynapse* TNeuron::GetPre ( Int_t n ) const

inline

Definition at line 54 of file TNeuron.h.

◆ GetTarget()

Double_t TNeuron::GetTarget ( ) const

Computes the normalized target pattern for output neurons.

Returns 0 for other neurons.

Definition at line 1074 of file TNeuron.cxx.

◆ GetType()

TNeuron::ENeuronType TNeuron::GetType ( ) const

Returns the neuron type.

Definition at line 867 of file TNeuron.cxx.

◆ GetValue()

Double_t TNeuron::GetValue ( ) const

Computes the output using the appropriate function and all the weighted inputs, or uses the branch as input.

In that case, the branch normalisation is also used.

Definition at line 948 of file TNeuron.cxx.

◆ GetWeight()

Double_t TNeuron::GetWeight ( ) const

inline

Definition at line 67 of file TNeuron.h.

◆ operator=()

TNeuron& TNeuron::operator= ( const TNeuron & )

private

◆ SetDEDw()

void TNeuron::SetDEDw ( Double_t in )

Sets the derivative of the total error wrt the neuron weight.

Definition at line 1168 of file TNeuron.cxx.

◆ SetNewEvent()

void TNeuron::SetNewEvent ( ) const

Inform the neuron that inputs of the network have changed, so that the buffered values have to be recomputed.

Definition at line 1157 of file TNeuron.cxx.

◆ SetNormalisation()

void TNeuron::SetNormalisation	(	Double_t	mean,
		Double_t	RMS
	)

Sets the normalization variables.

Any input neuron will return (branch-mean)/RMS. When UseBranch is called, mean and RMS are automatically set to the actual branch mean and RMS.

Definition at line 1137 of file TNeuron.cxx.

◆ SetWeight()

void TNeuron::SetWeight ( Double_t w )

Sets the neuron weight to w.

The neuron weight corresponds to the bias in the linear combination of the inputs.

Definition at line 1148 of file TNeuron.cxx.

◆ Sigmoid()

Double_t TNeuron::Sigmoid ( Double_t x ) const

protected

The Sigmoid.

Fast computation of the values of the sigmoid function. Uses values of the function up to the seventh order tabulated at 700 points. Values were computed in long double precision (16 bytes, precision to about 37 digits) on a hp computer. Some values were checked with Mathematica. Result should be correct to ~ 15 digits (about double precision)

From the mlpfit package (J.Schwindling 20-Jul-1999)

Definition at line 95 of file TNeuron.cxx.

◆ UseBranch()

TTreeFormula * TNeuron::UseBranch	(	TTree *	input,
		const char *	formula
	)

Sets a formula that can be used to make the neuron an input.

The formula is automatically normalized to mean=0, RMS=1. This normalisation is used by GetValue() (input neurons) and GetError() (output neurons)

Definition at line 878 of file TNeuron.cxx.

Friends And Related Function Documentation

◆ TSynapse

friend class TSynapse

friend

Definition at line 45 of file TNeuron.h.

Member Data Documentation

◆ fDeDw

Double_t TNeuron::fDeDw

private

do we need to compute fDeDw again ?

Definition at line 105 of file TNeuron.h.

◆ fDEDw

Double_t TNeuron::fDEDw

private

buffer containing the last derivative of the error

Definition at line 106 of file TNeuron.h.

◆ fDerivative

Double_t TNeuron::fDerivative

private

do we need to compute fDerivative again ?

Definition at line 103 of file TNeuron.h.

◆ fExtD

TFormula* TNeuron::fExtD

private

Definition at line 93 of file TNeuron.h.

◆ fExtF

TFormula* TNeuron::fExtF

private

Definition at line 92 of file TNeuron.h.

◆ fFormula

TTreeFormula* TNeuron::fFormula

private

Definition at line 96 of file TNeuron.h.

◆ fIndex

Int_t TNeuron::fIndex

private

formula to be used for inputs and outputs

Definition at line 97 of file TNeuron.h.

◆ fInput

Double_t TNeuron::fInput

private

do we need to compute fInput again ?

Definition at line 99 of file TNeuron.h.

◆ flayer

TObjArray TNeuron::flayer

private

Definition at line 88 of file TNeuron.h.

◆ fNewDeDw

Bool_t TNeuron::fNewDeDw

private

buffer containing the last neuron derivative

Definition at line 104 of file TNeuron.h.

◆ fNewDeriv

Bool_t TNeuron::fNewDeriv

private

buffer containing the last neuron output

Definition at line 102 of file TNeuron.h.

◆ fNewInput

Bool_t TNeuron::fNewInput

private

index in the formula

Definition at line 98 of file TNeuron.h.

◆ fNewValue

Bool_t TNeuron::fNewValue

private

buffer containing the last neuron input

Definition at line 100 of file TNeuron.h.

◆ fNorm

Double_t TNeuron::fNorm[2]

private

Definition at line 90 of file TNeuron.h.

◆ fpost

TObjArray TNeuron::fpost

private

Definition at line 87 of file TNeuron.h.

◆ fpre

TObjArray TNeuron::fpre

private

Definition at line 86 of file TNeuron.h.

◆ fType

ENeuronType TNeuron::fType

private

Definition at line 91 of file TNeuron.h.

◆ fValue

Double_t TNeuron::fValue

private

do we need to compute fValue again ?

Definition at line 101 of file TNeuron.h.

◆ fWeight

Double_t TNeuron::fWeight

private

Definition at line 89 of file TNeuron.h.

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

tmva/tmva/inc/TMVA/TNeuron.h
math/mlp/src/TNeuron.cxx

Public Types

Public Member Functions

Protected Member Functions

Private Member Functions

Private Attributes

Friends

Additional Inherited Members

Member Enumeration Documentation

◆ ENeuronType

Constructor & Destructor Documentation

◆ TNeuron() [1/2]

◆ ~TNeuron()

◆ TNeuron() [2/2]

Member Function Documentation

◆ AddInLayer()

◆ AddPost()

◆ AddPre()

◆ DSigmoid()

◆ ForceExternalValue()

◆ GetBranch()

◆ GetDeDw()

◆ GetDEDw()

◆ GetDerivative()

◆ GetError()

◆ GetInLayer()

◆ GetInput()

◆ GetNormalisation()

◆ GetPost()

◆ GetPre()

◆ GetTarget()

◆ GetType()

◆ GetValue()

◆ GetWeight()

◆ operator=()

◆ SetDEDw()

◆ SetNewEvent()

◆ SetNormalisation()

◆ SetWeight()

◆ Sigmoid()

◆ UseBranch()

Friends And Related Function Documentation

◆ TSynapse

Member Data Documentation

◆ fDeDw

◆ fDEDw

◆ fDerivative

◆ fExtD

◆ fExtF

◆ fFormula

◆ fIndex

◆ fInput

◆ flayer

◆ fNewDeDw

◆ fNewDeriv

◆ fNewInput

◆ fNewValue

◆ fNorm

◆ fpost

◆ fpre

◆ fType

◆ fValue

◆ fWeight