3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
7 // some utilities which do net exist in the standard ROOT
13 //#include "TGraph2D.h"
24 class TStatToolkit : public TObject
28 virtual ~TStatToolkit();
32 static void EvaluateUni(Int_t nvectors, Double_t *data, Double_t &mean, Double_t &sigma, Int_t hh);
33 static void EvaluateUniExternal(Int_t nvectors, Double_t *data, Double_t &mean, Double_t &sigma, Int_t hh, Float_t externalfactor=1);
34 static Int_t Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down);
38 static void TruncatedMean(const TH1 * his, TVectorD *param, Float_t down=0, Float_t up=1.0, Bool_t verbose=kFALSE);
39 static void LTM(TH1F * his, TVectorD *param=0 , Float_t fraction=1, Bool_t verbose=kFALSE);
40 static Double_t FitGaus(TH1* his, TVectorD *param=0, TMatrixD *matrix=0, Float_t xmin=0, Float_t xmax=0, Bool_t verbose=kFALSE);
41 static Double_t FitGaus(Float_t *arr, Int_t nBins, Float_t xMin, Float_t xMax, TVectorD *param=0, TMatrixD *matrix=0, Bool_t verbose=kFALSE);
42 static Float_t GetCOG(const Short_t *arr, Int_t nBins, Float_t xMin, Float_t xMax, Float_t *rms=0, Float_t *sum=0);
44 static TGraph2D * MakeStat2D(TH3 * his, Int_t delta0, Int_t delta1, Int_t type);
45 static TGraph * MakeStat1D(TH3 * his, Int_t delta1, Int_t type);
49 static TGraph * MakeGraphSparse(TTree * tree, const char * expr="Entry", const char * cut="1");
53 static TString* FitPlane(TTree * tree, const char* drawCommand, const char* formula, const char* cuts, Double_t & chi2, Int_t &npoints, TVectorD &fitParam, TMatrixD &covMatrix, Float_t frac=-1, Int_t start=0, Int_t stop=10000000, Bool_t fix0=kFALSE);
54 static TString* FitPlaneFixed(TTree * tree, const char* drawCommand, const char* formula, const char* cuts, Double_t & chi2, Int_t &npoints, TVectorD &fitParam, TMatrixD &covMatrix, Float_t frac=-1, Int_t start=0, Int_t stop=10000000);
56 //Linear fitter helper function
58 static TString* FitPlaneConstrain(TTree * tree, const char* drawCommand, const char* formula, const char* cuts, Double_t & chi2, Int_t &npoints, TVectorD &fitParam, TMatrixD &covMatrix, Float_t frac=-1, Int_t start=0, Int_t stop=10000000, Double_t constrain=-1);
59 static Int_t GetFitIndex(const TString fString, const TString subString);
60 static TString FilterFit(const TString &input, const TString filter, TVectorD &vec, TMatrixD &covar);
61 static void Update1D(Double_t delta, Double_t sigma, Int_t s1, TMatrixD ¶m, TMatrixD &covar);
62 static void Constrain1D(const TString &input, const TString filter, TVectorD ¶m, TMatrixD & covar, Double_t mean, Double_t sigma);
63 static TString MakeFitString(const TString &input, const TVectorD ¶m, const TMatrixD & covar, Bool_t verbose=kFALSE);
68 static void TestGausFit(Int_t nhistos=5000);
70 ClassDef(TStatToolkit,0) // Various mathematical tools for physics analysis - which are not included in ROOT TMath