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class AliSplineFit: public TObject

                Implementation of the AliSplineFit class
   The class performs a spline fit on an incoming TGraph. The graph is
   divided into several parts (identified by knots between each part).
   Spline fits are performed on each part. According to user parameters,
   the function, first and second derivative are requested to be continuous
   at each knot.
        Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
   Adjustments by Haavard Helstrup,  Haavard.Helstrup@cern.ch

Function Members (Methods)

public:

	AliSplineFit()
	AliSplineFit(const AliSplineFit&)
virtual	~AliSplineFit()
void	TObject::AbstractMethod(const char* method) const
virtual void	TObject::AppendPad(Option_t* option = "")
virtual void	TObject::Browse(TBrowser* b)
static TClass*	Class()
virtual const char*	TObject::ClassName() const
void	Cleanup()
virtual void	TObject::Clear(Option_t* = "")
virtual TObject*	TObject::Clone(const char* newname = "") const
virtual Int_t	TObject::Compare(const TObject* obj) const
virtual void	TObject::Copy(TObject& object) const
void	CopyGraph()
virtual void	TObject::Delete(Option_t* option = "")MENU
virtual Int_t	TObject::DistancetoPrimitive(Int_t px, Int_t py)
virtual void	TObject::Draw(Option_t* option = "")
virtual void	TObject::DrawClass() constMENU
virtual TObject*	TObject::DrawClone(Option_t* option = "") constMENU
virtual void	TObject::Dump() constMENU
virtual void	TObject::Error(const char* method, const char* msgfmt) const
Double_t	Eval(Double_t x, Int_t deriv = 0) const
virtual void	TObject::Execute(const char* method, const char* params, Int_t* error = 0)
virtual void	TObject::Execute(TMethod* method, TObjArray* params, Int_t* error = 0)
virtual void	TObject::ExecuteEvent(Int_t event, Int_t px, Int_t py)
virtual void	TObject::Fatal(const char* method, const char* msgfmt) const
virtual TObject*	TObject::FindObject(const char* name) const
virtual TObject*	TObject::FindObject(const TObject* obj) const
static TGraph*	GenerGraph(Int_t npoints, Double_t fraction, Double_t s1, Double_t s2, Double_t s3, Int_t der = 0)
static TGraph*	GenerNoise(TGraph* graph0, Double_t s0)
virtual Option_t*	TObject::GetDrawOption() const
static Long_t	TObject::GetDtorOnly()
virtual const char*	TObject::GetIconName() const
Int_t	GetKnots() const
Int_t	GetMinPoints() const
virtual const char*	TObject::GetName() const
virtual char*	TObject::GetObjectInfo(Int_t px, Int_t py) const
static Bool_t	TObject::GetObjectStat()
virtual Option_t*	TObject::GetOption() const
virtual const char*	TObject::GetTitle() const
virtual UInt_t	TObject::GetUniqueID() const
Double_t*	GetX() const
Double_t*	GetY0() const
Double_t*	GetY1() const
virtual Bool_t	TObject::HandleTimer(TTimer* timer)
virtual ULong_t	TObject::Hash() const
virtual void	TObject::Info(const char* method, const char* msgfmt) const
virtual Bool_t	TObject::InheritsFrom(const char* classname) const
virtual Bool_t	TObject::InheritsFrom(const TClass* cl) const
void	InitKnots(TGraph* graph, Int_t min, Int_t iter, Double_t maxDelta)
virtual void	TObject::Inspect() constMENU
void	TObject::InvertBit(UInt_t f)
virtual TClass*	IsA() const
virtual Bool_t	TObject::IsEqual(const TObject* obj) const
virtual Bool_t	TObject::IsFolder() const
Bool_t	TObject::IsOnHeap() const
virtual Bool_t	TObject::IsSortable() const
Bool_t	TObject::IsZombie() const
virtual void	TObject::ls(Option_t* option = "") const
TGraph*	MakeDiff(TGraph* graph) const
TH1F*	MakeDiffHisto(TGraph* graph) const
TGraph*	MakeGraph(Double_t xmin, Double_t xmax, Int_t npoints, Int_t deriv = 0) const
void	MakeKnots0(TGraph* graph, Double_t maxdelta, Int_t minpoints)
void	MakeSmooth(TGraph* graph, Float_t ratio, Option_t* type)
void	TObject::MayNotUse(const char* method) const
virtual Bool_t	TObject::Notify()
void	TObject::Obsolete(const char* method, const char* asOfVers, const char* removedFromVers) const
static void	TObject::operator delete(void* ptr)
static void	TObject::operator delete(void* ptr, void* vp)
static void	TObject::operator delete[](void* ptr)
static void	TObject::operator delete[](void* ptr, void* vp)
void*	TObject::operator new(size_t sz)
void*	TObject::operator new(size_t sz, void* vp)
void*	TObject::operator new[](size_t sz)
void*	TObject::operator new[](size_t sz, void* vp)
AliSplineFit&	operator=(const AliSplineFit&)
virtual void	TObject::Paint(Option_t* option = "")
virtual void	TObject::Pop()
virtual void	TObject::Print(Option_t* option = "") const
virtual Int_t	TObject::Read(const char* name)
virtual void	TObject::RecursiveRemove(TObject* obj)
void	TObject::ResetBit(UInt_t f)
virtual void	TObject::SaveAs(const char* filename = "", Option_t* option = "") constMENU
virtual void	TObject::SavePrimitive(basic_ostream<char,char_traits<char> >& out, Option_t* option = "")
void	TObject::SetBit(UInt_t f)
void	TObject::SetBit(UInt_t f, Bool_t set)
virtual void	TObject::SetDrawOption(Option_t* option = "")MENU
static void	TObject::SetDtorOnly(void* obj)
void	SetGraph(TGraph* graph)
void	SetMinPoints(Int_t minPoints)
static void	TObject::SetObjectStat(Bool_t stat)
virtual void	TObject::SetUniqueID(UInt_t uid)
virtual void	ShowMembers(TMemberInspector&)
void	SplineFit(Int_t nder)
virtual void	Streamer(TBuffer&)
void	StreamerNVirtual(TBuffer& ClassDef_StreamerNVirtual_b)
virtual void	TObject::SysError(const char* method, const char* msgfmt) const
static void	Test(Int_t npoints = 2000, Int_t ntracks = 100, Float_t snoise = 0.05)
Bool_t	TObject::TestBit(UInt_t f) const
Int_t	TObject::TestBits(UInt_t f) const
void	Update(TSpline3* spline, Int_t nknots)
virtual void	TObject::UseCurrentStyle()
virtual void	TObject::Warning(const char* method, const char* msgfmt) const
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0)
virtual Int_t	TObject::Write(const char* name = 0, Int_t option = 0, Int_t bufsize = 0) const

protected:

Float_t	CheckKnot(Int_t iKnot)
virtual void	TObject::DoError(int level, const char* location, const char* fmt, va_list va) const
static TLinearFitter*	fitterStatic()
void	TObject::MakeZombie()
Int_t	OptimizeKnots(Int_t nIter)
Bool_t	RefitKnot(Int_t iKnot)

Data Members

public:

enum TObject::EStatusBits {	kCanDelete
	kMustCleanup
	kObjInCanvas
	kIsReferenced
	kHasUUID
	kCannotPick
	kNoContextMenu
	kInvalidObject
};
enum TObject::[unnamed] {	kIsOnHeap
	kNotDeleted
	kZombie
	kBitMask
	kSingleKey
	kOverwrite
	kWriteDelete
};

protected:

Bool_t	fBDump	dump debug information flag
Double_t	fChi2	chi2 per degree of freedom
Double_t*	fChi2I	[fN] - chi2 on interval
TClonesArray*	fCovars	object array of covariance in knots
TGraph*	fGraph	! initial graph
Int_t*	fIndex	[fN0] index of point corresponding to knot
Double_t	fMaxDelta	maximal deviation of the spline fit
Int_t	fMinPoints	minimum number of points to create AliSplineFit
Int_t	fN	number of knots after compression
Int_t	fN0	number of knots in iteration 0
Int_t	fNmin	number of points per one knot in iteration 0
TClonesArray*	fParams	object array of parameters in knots
Double_t	fSigma	locally estimated sigma
Double_t*	fX	[fN] - xknot value
Double_t*	fY0	[fN] - y value at X
Double_t*	fY1	[fN] - y derivative value at X

Class Charts

Inheritance Chart:

TObject

←

AliSplineFit

Function documentation

TLinearFitter* fitterStatic()

AliSplineFit()

 Default constructor

{ }

AliSplineFit(const AliSplineFit& )

  Copy constructor

AliSplineFit& operator=(const AliSplineFit& )

  assignment operator

~AliSplineFit()

 destructor. Don't delete fGraph, as this normally comes as input parameter

Double_t Eval(Double_t x, Int_t deriv = 0) const

 evaluate value at x
   deriv = 0: function value
         = 1: first derivative
         = 2: 2nd derivative
         = 3: 3rd derivative

  a2 = -(3*a0 -3*b0 + 2*a1*dx +b1*dx)/(dx*dx)
  a3 = -(-2*a0+2*b0 - a1*dx - b1*dx)/(dx*dx*dx)

TGraph * GenerGraph(Int_t npoints, Double_t fraction, Double_t s1, Double_t s2, Double_t s3, Int_t der = 0)

 generate random graph
 xrange 0,1
 yrange 0,1
 s1, s2, s3 -  sigma of derivative
 fraction   -

TGraph * GenerNoise(TGraph* graph0, Double_t s0)

 add noise to graph

TGraph * MakeGraph(Double_t xmin, Double_t xmax, Int_t npoints, Int_t deriv = 0) const

 if npoints<=0 draw derivative

TGraph * MakeDiff(TGraph* graph) const

 Make graph of difference to reference graph

TH1F * MakeDiffHisto(TGraph* graph) const

 Make histogram of difference to reference graph

void InitKnots(TGraph* graph, Int_t min, Int_t iter, Double_t maxDelta)

 initialize knots + estimate sigma of noise + make initial parameters

Int_t OptimizeKnots(Int_t nIter)

Bool_t RefitKnot(Int_t iKnot)

Float_t CheckKnot(Int_t iKnot)

void SplineFit(Int_t nder)

 Cubic spline fit of graph

 nder
 nder<0  - no continuity requirement
     =0  - continous  0 derivative
     =1  - continous  1 derivative
     >1  - continous  2 derivative

void MakeKnots0(TGraph* graph, Double_t maxdelta, Int_t minpoints)

 make knots  - restriction max distance and minimum points

void MakeSmooth(TGraph* graph, Float_t ratio, Option_t* type)

 Interface to GraphSmooth

void Update(TSpline3* spline, Int_t nknots)

void Test(Int_t npoints = 2000, Int_t ntracks = 100, Float_t snoise = 0.05)

 test function

void Cleanup()

 deletes extra information to reduce amount of information stored on the data
 base

void CopyGraph()

 enter graph points directly to fit parameters
 (to bee used when too few points are available)

Int_t GetKnots() const

{return fN;}

Double_t* GetX() const

{return fX;}

Double_t* GetY0() const

{return fY0;}

Double_t* GetY1() const

 Test functions

{return fY1;}

void SetGraph(TGraph* graph)

{ fGraph=graph; }

void SetMinPoints(Int_t minPoints)

{ fMinPoints=minPoints;}

Int_t GetMinPoints() const

{ return fMinPoints; }