[u/mrichter/AliRoot.git] / PWGHF / vertexingHF / AliHFMassFitter.h

#ifndef ALIHFMASSFITTER_H
#define ALIHFMASSFITTER_H
/* Copyright(c) 1998-2009, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

/* $Id$ */ 

/////////////////////////////////////////////////////////////
//
// AliHFMassFitter for the fit of invariant mass distribution
// of charmed mesons
//
// Author: C.Bianchin, chiara.bianchin@pd.infn.it
/////////////////////////////////////////////////////////////

#include <TNamed.h>
#include <TString.h>

class TF1;
class TNtuple;
class TFile;
class TList;
class TH1F;
class TVirtualPad;

class AliHFMassFitter : public TNamed {

 public:

  enum ETypeOfBkg{ kExpo=0, kLin=1, kPol2=2, kNoBk=3, kPow=4, kPowEx=5 };
  enum ETypeOfSgn{ kGaus=0, k2Gaus=1  };

  AliHFMassFitter();
  AliHFMassFitter(const TH1F* histoToFit, Double_t minvalue, Double_t maxvalue, Int_t rebin=1, Int_t fittypeb=kExpo, Int_t fittypes=kGaus);
  virtual ~AliHFMassFitter();

  AliHFMassFitter(const AliHFMassFitter &mfit);
  AliHFMassFitter& operator=(const AliHFMassFitter &mfit);

  //setters
  void     SetHisto(const TH1F *histoToFit);
  void     SetRangeFit(Double_t minvalue, Double_t maxvalue){fminMass=minvalue; fmaxMass=maxvalue; CheckRangeFit();}
  void     SetMinRangeFit(Double_t minvalue){fminMass=minvalue;printf("CheckRangeFit after SetMaxRangeFit is also set\n");}
  void     SetMaxRangeFit(Double_t maxvalue){fmaxMass=maxvalue;printf("CheckRangeFit after SetMinRangeFit is also set\n");}
  void     SetBinN(Int_t newbinN){fNbin=newbinN;}
  void     SetType(Int_t fittypeb, Int_t fittypes);
  void     SetReflectionSigmaFactor(Int_t constant) {ffactor=constant;}
  void     SetInitialGaussianMean(Double_t mean) {fMass=mean;} // change the default value of the mean
  void     SetInitialGaussianSigma(Double_t sigma) {fSigmaSgn=sigma;} // change the default value of the sigma
  void     SetSideBands(Bool_t onlysidebands=kTRUE) {fSideBands=onlysidebands;} // consider only side bands
  void     SetFixParam(Bool_t *fixpar){fFixPar=fixpar;}
  void     SetDefaultFixParam();
  Bool_t   SetFixThisParam(Int_t thispar,Bool_t fixpar);
  void     SetFixGaussianMean(Double_t mean=1.865,Bool_t fixpar=kTRUE){SetInitialGaussianMean(mean); SetFixThisParam(fNFinalPars-2,fixpar);}
  void     SetFixGaussianSigma(Double_t sigma=0.012, Bool_t fixpar=kTRUE){SetInitialGaussianSigma(sigma); SetFixThisParam(fNFinalPars-1,fixpar);}

  //getters
  TH1F*    GetHistoClone() const; //return the histogram
  void     GetRangeFit(Double_t &minvalue, Double_t &maxvalue) const {minvalue=fminMass; maxvalue=fmaxMass;}
  Double_t GetMinRangeFit()const {return fminMass;}
  Double_t GetMaxRangeFit()const {return fmaxMass;}
  Int_t    GetBinN()       const {return fNbin;}
  void     GetFitPars(Float_t* pars) const;
  Int_t    GetNFinalPars() const {return fNFinalPars;}
  void     GetTypeOfFit(Bool_t &background, Int_t &typeb) const {background = fWithBkg; typeb = ftypeOfFit4Bkg;}
  Int_t    GetReflectionSigmaFactor() const {return ffactor;} 
  Double_t GetMean() const {return fMass;}
  Double_t GetMeanUncertainty() const {return fMassErr;}
  Double_t GetSigma()const {return fSigmaSgn;}
  Double_t GetSigmaUncertainty()const { return fSigmaSgnErr;}
  Double_t GetRawYield()const {return fRawYield;}
  Double_t GetRawYieldError()const {return fRawYieldErr;}
  Double_t GetChiSquare() const;
  Double_t GetReducedChiSquare() const;
  void     GetSideBandsBounds(Int_t& lb, Int_t& hb) const;
  Bool_t*  GetFixParam()const {return fFixPar;}
  Bool_t   GetFixThisParam(Int_t thispar)const;
  TVirtualPad* GetPad(Double_t nsigma=3,Int_t writeFitInfo=1)const;

  void     PrintParTitles() const;

  void     InitNtuParam(TString ntuname="ntupar"); // initialize TNtuple to store the parameters
  void     FillNtuParam(); //Fill the TNtuple with the current parameters
  TNtuple* GetNtuParam() const {return fntuParam;} // return the TNtuple
  TNtuple* NtuParamOneShot(TString ntuname="ntupar"); // the three functions above all together
  void     WriteHisto(TString path="./") const; // write the histogram
  void     WriteNtuple(TString path="./") const; // write the TNtuple
  void     WriteCanvas(TString userIDstring="",TString path="./",Double_t nsigma=3,Int_t writeFitInfo=1,Bool_t draw=kFALSE) const; //write the canvas in a root file
  void     DrawHere(TVirtualPad* pd,Double_t nsigma=3,Int_t writeFitInfo=1) const;
  void     DrawFit(Double_t nsigma=3) const;
  void     Reset();

  void     IntS(Float_t *valuewitherror) const;    // integral of signal given my the fit with error
  Double_t IntTot() const {return fhistoInvMass->Integral("width");}  // return total integral of the histogram
  void     Signal(Double_t nOfSigma,Double_t &signal,Double_t &errsignal) const; // signal in nsigma with error 
  void     Signal(Double_t min,Double_t max,Double_t &signal,Double_t &errsignal) const; // signal in (min, max) with error 
  void     Background(Double_t nOfSigma,Double_t &background,Double_t &errbackground) const; // backgournd in nsigma with error 
  void     Background(Double_t min,Double_t max,Double_t &background,Double_t &errbackground) const; // backgournd in (min, max) with error 
  void     Significance(Double_t nOfSigma,Double_t &significance,Double_t &errsignificance) const; // significance in nsigma with error 
  void     Significance(Double_t min,Double_t max,Double_t &significance,Double_t &errsignificance) const; // significance in (min, max) with error 

  Double_t FitFunction4MassDistr (Double_t* x, Double_t* par);
  Double_t FitFunction4Sgn (Double_t* x, Double_t* par);
  Double_t FitFunction4Bkg (Double_t* x, Double_t* par);
  Bool_t   MassFitter(Bool_t draw=kTRUE);
  Bool_t   RefitWithBkgOnly(Bool_t draw=kTRUE);
  void     RebinMass(Int_t bingroup=1);
  TF1*     GetBackgroundFullRangeFunc(){
    return fhistoInvMass->GetFunction("funcbkgFullRange");
  }
  TF1*     GetBackgroundRecalcFunc(){
    return fhistoInvMass->GetFunction("funcbkgRecalc");
  }
  TF1*     GetMassFunc(){
    return fhistoInvMass->GetFunction("funcmass");
  }
  void SetUseLikelihoodFit(){fFitOption="L,";}
  void SetUseLikelihoodWithWeightsFit(){fFitOption="WL,";}
  void SetUseChi2Fit(){fFitOption="";}

 private:

  void     PlotFit(TVirtualPad* pd,Double_t nsigma=3,Int_t writeFitInfo=1)const;

  void     ComputeParSize();
  void     ComputeNFinalPars();
  Bool_t   SideBandsBounds();
  Bool_t   CheckRangeFit();
  void     AddFunctionsToHisto();

  TH1F*     fhistoInvMass;     // histogram to fit
  Double_t  fminMass;          // lower mass limit
  Double_t  fmaxMass;          // upper mass limit
  Int_t     fminBinMass;       // bin corresponding to fminMass
  Int_t     fmaxBinMass;       // bin corresponding to fmaxMass
  Int_t     fNbin;             // number of bins
  Int_t     fParsSize;         // size of fFitPars array
  Int_t     fNFinalPars;       // number of parameters of the final function
  Float_t*  fFitPars;          //[fParsSize] array of fit parameters
  Bool_t    fWithBkg;          // signal+background (kTRUE) or signal only (kFALSE)
  Int_t     ftypeOfFit4Bkg;    // 0 = exponential; 1 = linear; 2 = pol2
  Int_t     ftypeOfFit4Sgn;    // 0 = gaus; 1 = gaus+gaus broadened
  Int_t     ffactor;           // number to multiply to the sigma of the signal to obtain the reflected gaussian
  TNtuple*  fntuParam;         // contains fit parameters
  Double_t  fMass;             // signal gaussian mean value
  Double_t  fMassErr;          // err signal gaussian mean value
  Double_t  fSigmaSgn;         // signal gaussian sigma
  Double_t  fSigmaSgnErr;      // err signal gaussian sigma
  Double_t  fRawYield;         // signal gaussian integral
  Double_t  fRawYieldErr;      // err on signal gaussian integral
  Bool_t    fSideBands;        // kTRUE = only side bands considered
  Bool_t*   fFixPar;           //[fNFinalPars] for each par if kTRUE it is fixed in fit
  Int_t     fSideBandl;        // left side band limit (bin number)
  Int_t     fSideBandr;        // right side band limit (bin number)
  Int_t     fcounter;          // internal counter
  TString   fFitOption;        // L, LW or Chi2
  TList*    fContourGraph;     // TList of TGraph containing contour plots

  ClassDef(AliHFMassFitter,8); // class for invariant mass fit
};

#endif
Commit	Line	Data
fabf4d8e	1	#ifndef ALIHFMASSFITTER_H
	2	#define ALIHFMASSFITTER_H
	3	/* Copyright(c) 1998-2009, ALICE Experiment at CERN, All rights reserved. *
	4	* See cxx source for full Copyright notice */
	5
27de2dfb	6	/* $Id$ */
27de2dfb	7
fabf4d8e	8	/////////////////////////////////////////////////////////////
	9	//
	10	// AliHFMassFitter for the fit of invariant mass distribution
	11	// of charmed mesons
	12	//
	13	// Author: C.Bianchin, chiara.bianchin@pd.infn.it
	14	/////////////////////////////////////////////////////////////
	15
	16	#include <TNamed.h>
fabf4d8e	17	#include <TString.h>
fabf4d8e	18
dc262918	19	class TF1;
	20	class TNtuple;
	21	class TFile;
	22	class TList;
	23	class TH1F;
a12d80b8	24	class TVirtualPad;
fabf4d8e	25
	26	class AliHFMassFitter : public TNamed {
	27
	28	public:
9fdc4a0c	29
	30	enum ETypeOfBkg{ kExpo=0, kLin=1, kPol2=2, kNoBk=3, kPow=4, kPowEx=5 };
	31	enum ETypeOfSgn{ kGaus=0, k2Gaus=1 };
	32
fabf4d8e	33	AliHFMassFitter();
9fdc4a0c	34	AliHFMassFitter(const TH1F* histoToFit, Double_t minvalue, Double_t maxvalue, Int_t rebin=1, Int_t fittypeb=kExpo, Int_t fittypes=kGaus);
2f328d65	35	virtual ~AliHFMassFitter();
fabf4d8e	36
74179930	37	AliHFMassFitter(const AliHFMassFitter &mfit);
74179930	38	AliHFMassFitter& operator=(const AliHFMassFitter &mfit);
fabf4d8e	39
fabf4d8e	40	//setters
dc262918	41	void SetHisto(const TH1F *histoToFit);
d22f0682	42	void SetRangeFit(Double_t minvalue, Double_t maxvalue){fminMass=minvalue; fmaxMass=maxvalue; CheckRangeFit();}
24e73105	43	void SetMinRangeFit(Double_t minvalue){fminMass=minvalue;printf("CheckRangeFit after SetMaxRangeFit is also set\n");}
24e73105	44	void SetMaxRangeFit(Double_t maxvalue){fmaxMass=maxvalue;printf("CheckRangeFit after SetMinRangeFit is also set\n");}
2f328d65	45	void SetBinN(Int_t newbinN){fNbin=newbinN;}
2f328d65	46	void SetType(Int_t fittypeb, Int_t fittypes);
fabf4d8e	47	void SetReflectionSigmaFactor(Int_t constant) {ffactor=constant;}
6321ee46	48	void SetInitialGaussianMean(Double_t mean) {fMass=mean;} // change the default value of the mean
	49	void SetInitialGaussianSigma(Double_t sigma) {fSigmaSgn=sigma;} // change the default value of the sigma
	50	void SetSideBands(Bool_t onlysidebands=kTRUE) {fSideBands=onlysidebands;} // consider only side bands
3c0e7d59	51	void SetFixParam(Bool_t *fixpar){fFixPar=fixpar;}
4d7b8e51	52	void SetDefaultFixParam();
3c0e7d59	53	Bool_t SetFixThisParam(Int_t thispar,Bool_t fixpar);
24e73105	54	void SetFixGaussianMean(Double_t mean=1.865,Bool_t fixpar=kTRUE){SetInitialGaussianMean(mean); SetFixThisParam(fNFinalPars-2,fixpar);}
5227afe7	55	void SetFixGaussianSigma(Double_t sigma=0.012, Bool_t fixpar=kTRUE){SetInitialGaussianSigma(sigma); SetFixThisParam(fNFinalPars-1,fixpar);}
fabf4d8e	56
fabf4d8e	57	//getters
6321ee46	58	TH1F* GetHistoClone() const; //return the histogram
a60f573d	59	void GetRangeFit(Double_t &minvalue, Double_t &maxvalue) const {minvalue=fminMass; maxvalue=fmaxMass;}
2f328d65	60	Double_t GetMinRangeFit()const {return fminMass;}
	61	Double_t GetMaxRangeFit()const {return fmaxMass;}
	62	Int_t GetBinN() const {return fNbin;}
dc262918	63	void GetFitPars(Float_t* pars) const;
4d7b8e51	64	Int_t GetNFinalPars() const {return fNFinalPars;}
56cbeefb	65	void GetTypeOfFit(Bool_t &background, Int_t &typeb) const {background = fWithBkg; typeb = ftypeOfFit4Bkg;}
fabf4d8e	66	Int_t GetReflectionSigmaFactor() const {return ffactor;}
0566386c	67	Double_t GetMean() const {return fMass;}
2cc87a41	68	Double_t GetMeanUncertainty() const {return fMassErr;}
0566386c	69	Double_t GetSigma()const {return fSigmaSgn;}
2cc87a41	70	Double_t GetSigmaUncertainty()const { return fSigmaSgnErr;}
e654a7da	71	Double_t GetRawYield()const {return fRawYield;}
e654a7da	72	Double_t GetRawYieldError()const {return fRawYieldErr;}
34c79b83	73	Double_t GetChiSquare() const;
b7d4bc49	74	Double_t GetReducedChiSquare() const;
dc262918	75	void GetSideBandsBounds(Int_t& lb, Int_t& hb) const;
3c0e7d59	76	Bool_t* GetFixParam()const {return fFixPar;}
3c0e7d59	77	Bool_t GetFixThisParam(Int_t thispar)const;
1bbb8940	78	TVirtualPad* GetPad(Double_t nsigma=3,Int_t writeFitInfo=1)const;
fabf4d8e	79
ad73ca8f	80	void PrintParTitles() const;
ad73ca8f	81
9c8a7bcf	82	void InitNtuParam(TString ntuname="ntupar"); // initialize TNtuple to store the parameters
6321ee46	83	void FillNtuParam(); //Fill the TNtuple with the current parameters
6321ee46	84	TNtuple* GetNtuParam() const {return fntuParam;} // return the TNtuple
9c8a7bcf	85	TNtuple* NtuParamOneShot(TString ntuname="ntupar"); // the three functions above all together
dc262918	86	void WriteHisto(TString path="./") const; // write the histogram
6321ee46	87	void WriteNtuple(TString path="./") const; // write the TNtuple
1bbb8940	88	void WriteCanvas(TString userIDstring="",TString path="./",Double_t nsigma=3,Int_t writeFitInfo=1,Bool_t draw=kFALSE) const; //write the canvas in a root file
	89	void DrawHere(TVirtualPad* pd,Double_t nsigma=3,Int_t writeFitInfo=1) const;
	90	void DrawFit(Double_t nsigma=3) const;
56cbeefb	91	void Reset();
56cbeefb	92
dc262918	93	void IntS(Float_t *valuewitherror) const; // integral of signal given my the fit with error
dc262918	94	Double_t IntTot() const {return fhistoInvMass->Integral("width");} // return total integral of the histogram
6321ee46	95	void Signal(Double_t nOfSigma,Double_t &signal,Double_t &errsignal) const; // signal in nsigma with error
	96	void Signal(Double_t min,Double_t max,Double_t &signal,Double_t &errsignal) const; // signal in (min, max) with error
	97	void Background(Double_t nOfSigma,Double_t &background,Double_t &errbackground) const; // backgournd in nsigma with error
	98	void Background(Double_t min,Double_t max,Double_t &background,Double_t &errbackground) const; // backgournd in (min, max) with error
	99	void Significance(Double_t nOfSigma,Double_t &significance,Double_t &errsignificance) const; // significance in nsigma with error
	100	void Significance(Double_t min,Double_t max,Double_t &significance,Double_t &errsignificance) const; // significance in (min, max) with error
fabf4d8e	101
dc262918	102	Double_t FitFunction4MassDistr (Double_t* x, Double_t* par);
	103	Double_t FitFunction4Sgn (Double_t* x, Double_t* par);
	104	Double_t FitFunction4Bkg (Double_t* x, Double_t* par);
34c79b83	105	Bool_t MassFitter(Bool_t draw=kTRUE);
5a8a84f8	106	Bool_t RefitWithBkgOnly(Bool_t draw=kTRUE);
d22f0682	107	void RebinMass(Int_t bingroup=1);
6e429dc7	108	TF1* GetBackgroundFullRangeFunc(){
	109	return fhistoInvMass->GetFunction("funcbkgFullRange");
	110	}
	111	TF1* GetBackgroundRecalcFunc(){
	112	return fhistoInvMass->GetFunction("funcbkgRecalc");
	113	}
	114	TF1* GetMassFunc(){
	115	return fhistoInvMass->GetFunction("funcmass");
	116	}
6bd53ac7	117	void SetUseLikelihoodFit(){fFitOption="L,";}
	118	void SetUseLikelihoodWithWeightsFit(){fFitOption="WL,";}
	119	void SetUseChi2Fit(){fFitOption="";}
fabf4d8e	120
	121	private:
	122
1bbb8940	123	void PlotFit(TVirtualPad* pd,Double_t nsigma=3,Int_t writeFitInfo=1)const;
a12d80b8	124
2f328d65	125	void ComputeParSize();
d22f0682	126	void ComputeNFinalPars();
b7d4bc49	127	Bool_t SideBandsBounds();
d22f0682	128	Bool_t CheckRangeFit();
16856d6e	129	void AddFunctionsToHisto();
2f328d65	130
d22f0682	131	TH1F* fhistoInvMass; // histogram to fit
	132	Double_t fminMass; // lower mass limit
	133	Double_t fmaxMass; // upper mass limit
1bbb8940	134	Int_t fminBinMass; // bin corresponding to fminMass
1bbb8940	135	Int_t fmaxBinMass; // bin corresponding to fmaxMass
d22f0682	136	Int_t fNbin; // number of bins
	137	Int_t fParsSize; // size of fFitPars array
	138	Int_t fNFinalPars; // number of parameters of the final function
	139	Float_t* fFitPars; //[fParsSize] array of fit parameters
	140	Bool_t fWithBkg; // signal+background (kTRUE) or signal only (kFALSE)
	141	Int_t ftypeOfFit4Bkg; // 0 = exponential; 1 = linear; 2 = pol2
	142	Int_t ftypeOfFit4Sgn; // 0 = gaus; 1 = gaus+gaus broadened
	143	Int_t ffactor; // number to multiply to the sigma of the signal to obtain the reflected gaussian
	144	TNtuple* fntuParam; // contains fit parameters
	145	Double_t fMass; // signal gaussian mean value
2cc87a41	146	Double_t fMassErr; // err signal gaussian mean value
d22f0682	147	Double_t fSigmaSgn; // signal gaussian sigma
2cc87a41	148	Double_t fSigmaSgnErr; // err signal gaussian sigma
e654a7da	149	Double_t fRawYield; // signal gaussian integral
e654a7da	150	Double_t fRawYieldErr; // err on signal gaussian integral
d22f0682	151	Bool_t fSideBands; // kTRUE = only side bands considered
4d7b8e51	152	Bool_t* fFixPar; //[fNFinalPars] for each par if kTRUE it is fixed in fit
d22f0682	153	Int_t fSideBandl; // left side band limit (bin number)
	154	Int_t fSideBandr; // right side band limit (bin number)
	155	Int_t fcounter; // internal counter
6bd53ac7	156	TString fFitOption; // L, LW or Chi2
d22f0682	157	TList* fContourGraph; // TList of TGraph containing contour plots
e654a7da	158
9fdc4a0c	159	ClassDef(AliHFMassFitter,8); // class for invariant mass fit
fabf4d8e	160	};
	161
	162	#endif
	163
74179930	164