[u/mrichter/AliRoot.git] / ESDCheck / AliFMDQATask.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/
//_________________________________________________________________________
// An analysis task to check the FMD data in simulated data
//
//*-- Hans Hjersing Dalsgaard 
//////////////////////////////////////////////////////////////////////////////

#include <TChain.h>
#include <TFile.h> 
#include <TCanvas.h> 
#include <TH1D.h> 
#include <TF1.h> 

#include "AliFMDQATask.h" 
#include "AliESD.h" 
#include "AliLog.h"

//______________________________________________________________________________
AliFMDQATask::AliFMDQATask(const char *name) : 
  AliAnalysisTask(name,""),  
  fChain(0),
  fESD(0), 
  fhFMD1i(0),
  fhFMD2i(0), 
  fhFMD2o(0), 
  fhFMD3i(0), 
  fhFMD3o(0) 
{
  // Constructor.
  // Input slot #0 works with an Ntuple
  DefineInput(0, TChain::Class());
  // Output slot #0 writes into a TH1 container
  DefineOutput(0,  TObjArray::Class()) ; 
}

//______________________________________________________________________________
AliFMDQATask::~AliFMDQATask()
{
  // dtor

  fOutputContainer->Clear() ; 
  delete fOutputContainer ; 

  delete fhFMD1i ;
  delete fhFMD2i ; 
  delete fhFMD2o ; 
  delete fhFMD3i ; 
  delete fhFMD3o ;

}

//______________________________________________________________________________
void AliFMDQATask::Init(const Option_t*)
{
  // Initialisation of branch container and histograms 
    
  AliInfo(Form("*** Initialization of %s", GetName())) ; 
  
  // Get input data
  fChain = dynamic_cast<TChain *>(GetInputData(0)) ;
  if (!fChain) {
    AliError(Form("Input 0 for %s not found\n", GetName()));
    return ;
  }
  
  if (!fESD) {
    // One should first check if the branch address was taken by some other task
    char ** address = (char **)GetBranchAddress(0, "ESD") ;
    if (address) 
      fESD = (AliESD *)(*address) ; 
    if (!fESD) 
      fChain->SetBranchAddress("ESD", &fESD) ;  
  }
  // The output objects will be written to 
  TDirectory * cdir = gDirectory ; 
  // Open a file for output #0
  char outputName[1024] ; 
  sprintf(outputName, "%s.root", GetName() ) ; 
  OpenFile(0, outputName , "RECREATE") ; 
  if (cdir) 
    cdir->cd() ; 
  
  // create histograms 
  fhFMD1i = new TH1D("FMD1i", "FMD1i", 100, -0.5, 3);
  fhFMD2i = new TH1D("FMD2i", "FMD2i", 100, -0.5, 3);
  fhFMD2o = new TH1D("FMD2o", "FMD2o", 100, -0.5, 3);
  fhFMD3i = new TH1D("FMD3i", "FMD3i", 100, -0.5, 3);
  fhFMD3o = new TH1D("FMD3o", "FMD3o", 100, -0.5, 3);

  // create output container
  
  fOutputContainer = new TObjArray(5) ; 
  fOutputContainer->SetName(GetName()) ; 

  fOutputContainer->AddAt(fhFMD1i,             0) ; 
  fOutputContainer->AddAt(fhFMD2i,             1) ; 
  fOutputContainer->AddAt(fhFMD2o,             2) ; 
  fOutputContainer->AddAt(fhFMD3i,             3) ; 
  fOutputContainer->AddAt(fhFMD3o,             4) ; 
}

//______________________________________________________________________________
void AliFMDQATask::Exec(Option_t *) 
{
  // Processing of one event
    
  Long64_t entry = fChain->GetReadEntry() ;
  
  if (!fESD) {
    AliError("fESD is not connected to the input!") ; 
    return ; 
  }
  
  if ( !((entry-1)%100) ) 
    AliInfo(Form("%s ----> Processing event # %lld",  (dynamic_cast<TChain *>(fChain))->GetFile()->GetName(), entry)) ; 
  
  // ************************  FMD *************************************
 
  AliESDFMD * fmd = fESD->GetFMDData() ;
  fmd->CheckNeedUShort(fChain->GetFile());

  Int_t nFMD1 = 0, nFMD2i = 0, nFMD2o = 0, nFMD3i = 0, nFMD3o = 0 ;
  
  UShort_t detector = 1 ;
  for(detector = 1 ; detector <= fmd->MaxDetectors() ; detector++) {
    Char_t ring = 'O' ;
    UShort_t sector ; 
    for(sector = 0 ;sector < fmd->MaxSectors() ; sector++) {
      UShort_t strip ;
      for(strip = 0 ; strip < fmd->MaxStrips(); strip++) {
	if(fmd->Multiplicity(detector, ring, sector, strip) != AliESDFMD::kInvalidMult)
	  RingSelector(detector, ring, fmd->Multiplicity(detector, ring, sector, strip)) ;
	if( (fmd->Multiplicity(detector, ring, sector, strip) == AliESDFMD::kInvalidMult) && detector == 2 )
	  nFMD2o++ ;
	if( (fmd->Multiplicity(detector, ring, sector, strip)==AliESDFMD::kInvalidMult) && detector == 3 )
	  nFMD3o++ ;
      }
    }
    ring='I';
    for(sector = 0; sector < fmd->MaxSectors(); sector++) {
      UShort_t strip ;
      for(strip = 0 ; strip < fmd->MaxStrips() ; strip++) {
	if(fmd->Multiplicity(detector, ring, sector, strip) != AliESDFMD::kInvalidMult)
	  RingSelector(detector, ring, fmd->Multiplicity(detector, ring, sector, strip));
	if( (fmd->Multiplicity(detector, ring, sector, strip) == AliESDFMD::kInvalidMult) && detector == 1 )
	  nFMD1++;
	if( (fmd->Multiplicity(detector, ring, sector, strip) == AliESDFMD::kInvalidMult) && detector == 2 )
	  nFMD2i++;
	if( (fmd->Multiplicity(detector, ring, sector, strip) == AliESDFMD::kInvalidMult) && detector == 3 )
	  nFMD3i++;
      }     
    }
  }

  if(nFMD1>100+10240)
    AliWarning(Form("number of missing strips in FMD1i too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
  if(nFMD2i>100+10240)
    AliWarning(Form("number of missing strips in FMD2i too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
  if(nFMD2o>100+10240)
    AliWarning(Form("number of missing strips in FMD2o too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
  if(nFMD3i>100+10240)
    AliWarning(Form("number of missing strips in FMD3i too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
  if(nFMD3o>100+10240)
    AliWarning(Form("number of missing strips in FMD3o too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
  
  PostData(0, fOutputContainer);
}

//______________________________________________________________________________
void AliFMDQATask::Terminate(Option_t *)
{
  // Processing when the event loop is ended
 
  TCanvas * cFMD1 = new TCanvas("cFMD1", "FMD ESD Test", 400, 10, 600, 700);
  cFMD1->Divide(3, 2) ; 

  cFMD1->cd(1) ;; 
  fhFMD1i->Draw() ; 
  
  cFMD1->cd(2) ;; 
  fhFMD2i->Draw() ; 

  cFMD1->cd(3) ;; 
  fhFMD2o->Draw() ; 

  cFMD1->cd(4) ;; 
  fhFMD3i->Draw() ; 

  cFMD1->cd(5) ;; 
  fhFMD3o->Draw() ; 
  
  cFMD1->Print("FMD.eps") ;

  Bool_t rv1i = TestHisto(fhFMD1i) ;
  Bool_t rv2i = TestHisto(fhFMD2i) ;
  Bool_t rv2o = TestHisto(fhFMD2o) ;
  Bool_t rv3i = TestHisto(fhFMD2i) ;
  Bool_t rv3o = TestHisto(fhFMD2o) ;
  
  if (  !(rv1i * rv2i * rv2o * rv3i * rv3o) )
    AliWarning("Possible problem in file !!! Check output!") ;


  char line[1024] ; 
  sprintf(line, ".!tar -zcvf %s.tar.gz *.eps", GetName()) ; 
  gROOT->ProcessLine(line);
  sprintf(line, ".!rm -fR *.eps"); 
  gROOT->ProcessLine(line);
 
  AliInfo(Form("!!! All the eps files are in %s.tar.gz !!! \n", GetName())) ;
}

//______________________________________________________________________________
void AliFMDQATask::RingSelector(const UShort_t detector, const Char_t ring, const Float_t mult) const 
{ 
  // fill the histograms for each ring in each detector layer

  if(ring == 'I' && detector == 1)
    fhFMD1i->Fill(mult) ;
  if(ring == 'I' && detector == 2)
    fhFMD2i->Fill(mult) ;
  if(ring == 'O' && detector == 2)
    fhFMD2o ->Fill(mult) ;
  if(ring == 'I' && detector == 3)
    fhFMD3i ->Fill(mult) ;
  if(ring == 'O' && detector == 3)
    fhFMD3o ->Fill(mult) ;
}
//______________________________________________________________________________
Bool_t AliFMDQATask::TestHisto(TH1D * hTest) const 
{  
  // analyses the histogram with a Landau function

  Float_t chiMax = 3, chiLow=0.5 ;
  Float_t chiSq ;
  Float_t mpv ;
  Int_t   ndf ;
  
  FitAll(hTest, chiSq, ndf, mpv, chiMax, chiLow);

  if( (chiSq > chiMax || chiSq < chiLow) || mpv < 0.6 || mpv > 1 ) {
    hTest->Rebin(2) ;
    FitAll(hTest, chiSq, ndf, mpv, chiMax, chiLow) ;
  }

  Bool_t   ret   = kFALSE ;
  Char_t * test  = "not OK";
  Char_t * test2 = "not OK";
  
  if(chiSq < chiMax && chiSq > chiLow)
    test = "OK" ;
  if(mpv > 0.6 && mpv < 1)
    test2 = "OK" ;
 
  if(test == "OK" && test2 == "OK")
    ret = kTRUE;
  
  if(test == "not OK" || test2 == "not OK") {
    AliWarning("Bad fit results") ; 
    printf("Detector : %s\n", hTest->GetName()) ;
    printf("Landau fit Chi Square / NDF = %f / %d which is %s\n", chiSq*ndf, ndf, test) ; 
    printf("Landau fit MPV is: %f which is %s\n", mpv, test2) ;
  }
  return ret;  
}
//______________________________________________________________________________
void AliFMDQATask::FitAll(TH1D* hTest, Float_t &chiSq, Int_t &ndf, Float_t &mpv, Float_t chiMax, Float_t chiLow ) const 
{
  // fit a histogram with a Landau distribution and returns chi square

  Float_t fitMax = hTest->GetXaxis()->GetXmax() ;

  TH1D hTmp = *hTest ;
  hTmp.SetAxisRange(0.4,fitMax) ;
  Int_t   maxBin = hTmp.GetMaximumBin();
  Float_t max    = hTmp.GetBinCenter(maxBin);
 
  hTest->Fit("landau", "QOI", "", max-0.3, fitMax) ;
  TF1* fitfunc = hTest->GetFunction("landau") ;
  chiSq = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
  mpv   = fitfunc->GetParameter(1) ;
  ndf   = fitfunc->GetNDF() ;

  if( ( chiSq > chiMax || chiSq < chiLow ) || ( mpv < 0.6 || mpv > 1 ) ) {
    hTest->Fit("landau", "QOI", "", max-0.2, fitMax) ;
    fitfunc = hTest->GetFunction("landau") ;
    chiSq   = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
    mpv     = fitfunc->GetParameter(1) ;
    ndf     = fitfunc->GetNDF() ;
  }
  if( ( chiSq >chiMax || chiSq < chiLow ) || ( mpv < 0.6 || mpv > 1 ) ) {
    hTest->Fit("landau", "QOI", "", max-0.1, fitMax) ;
    fitfunc = hTest->GetFunction("landau") ;
    chiSq   = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
    mpv     = fitfunc->GetParameter(1) ;
    ndf     = fitfunc->GetNDF() ;
  }
  if( ( chiSq > chiMax || chiSq <chiLow ) || ( mpv < 0.6 || mpv > 1 ) ) {
    hTest->Fit("landau", "QOI", "", max, fitMax) ;
    fitfunc = hTest->GetFunction("landau") ;
    chiSq   = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
    mpv     = fitfunc->GetParameter(1) ;
    ndf     = fitfunc->GetNDF(); 
  }
  if( ( chiSq > chiMax || chiSq < chiLow ) || ( mpv < 0.6 ||mpv > 1 ) ) {
    hTest->Fit("landau", "QOI", "", max+0.1, fitMax) ;
    fitfunc = hTest->GetFunction("landau") ;
    chiSq   = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
    mpv     = fitfunc->GetParameter(1) ;
    ndf     = fitfunc->GetNDF() ;
  } 
}
Commit	Line	Data
1dfe075f	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15	//_________________________________________________________________________
	16	// An analysis task to check the FMD data in simulated data
	17	//
	18	//*-- Hans Hjersing Dalsgaard
	19	//////////////////////////////////////////////////////////////////////////////
	20
	21	#include <TChain.h>
	22	#include <TFile.h>
	23	#include <TCanvas.h>
	24	#include <TH1D.h>
	25	#include <TF1.h>
	26
	27	#include "AliFMDQATask.h"
	28	#include "AliESD.h"
	29	#include "AliLog.h"
	30
	31	//______________________________________________________________________________
	32	AliFMDQATask::AliFMDQATask(const char *name) :
	33	AliAnalysisTask(name,""),
	34	fChain(0),
	35	fESD(0),
	36	fhFMD1i(0),
	37	fhFMD2i(0),
	38	fhFMD2o(0),
	39	fhFMD3i(0),
	40	fhFMD3o(0)
	41	{
	42	// Constructor.
	43	// Input slot #0 works with an Ntuple
	44	DefineInput(0, TChain::Class());
	45	// Output slot #0 writes into a TH1 container
	46	DefineOutput(0, TObjArray::Class()) ;
	47	}
	48
	49	//______________________________________________________________________________
	50	AliFMDQATask::~AliFMDQATask()
	51	{
	52	// dtor
	53
	54	fOutputContainer->Clear() ;
	55	delete fOutputContainer ;
	56
	57	delete fhFMD1i ;
	58	delete fhFMD2i ;
	59	delete fhFMD2o ;
	60	delete fhFMD3i ;
	61	delete fhFMD3o ;
	62
	63	}
	64
65	//______________________________________________________________________________
66	void AliFMDQATask::Init(const Option_t*)
67	{
68	// Initialisation of branch container and histograms
69
70	AliInfo(Form("*** Initialization of %s", GetName())) ;
71
72	// Get input data
73	fChain = dynamic_cast<TChain *>(GetInputData(0)) ;
74	if (!fChain) {
75	AliError(Form("Input 0 for %s not found\n", GetName()));
76	return ;
77	}
78
79	if (!fESD) {
80	// One should first check if the branch address was taken by some other task
81	char address = (char )GetBranchAddress(0, "ESD") ;
82	if (address)
83	fESD = (AliESD )(address) ;
84	if (!fESD)
85	fChain->SetBranchAddress("ESD", &fESD) ;
86	}
87	// The output objects will be written to
88	TDirectory * cdir = gDirectory ;
89	// Open a file for output #0
90	char outputName[1024] ;
91	sprintf(outputName, "%s.root", GetName() ) ;
92	OpenFile(0, outputName , "RECREATE") ;
93	if (cdir)
94	cdir->cd() ;
95
96	// create histograms
97	fhFMD1i = new TH1D("FMD1i", "FMD1i", 100, -0.5, 3);
98	fhFMD2i = new TH1D("FMD2i", "FMD2i", 100, -0.5, 3);
99	fhFMD2o = new TH1D("FMD2o", "FMD2o", 100, -0.5, 3);
100	fhFMD3i = new TH1D("FMD3i", "FMD3i", 100, -0.5, 3);
101	fhFMD3o = new TH1D("FMD3o", "FMD3o", 100, -0.5, 3);
102
103	// create output container
104
105	fOutputContainer = new TObjArray(5) ;
106	fOutputContainer->SetName(GetName()) ;
107
108	fOutputContainer->AddAt(fhFMD1i, 0) ;
109	fOutputContainer->AddAt(fhFMD2i, 1) ;
110	fOutputContainer->AddAt(fhFMD2o, 2) ;
111	fOutputContainer->AddAt(fhFMD3i, 3) ;
112	fOutputContainer->AddAt(fhFMD3o, 4) ;
113	}
114
115	//______________________________________________________________________________
116	void AliFMDQATask::Exec(Option_t *)
117	{
118	// Processing of one event
119
120	Long64_t entry = fChain->GetReadEntry() ;
121
122	if (!fESD) {
123	AliError("fESD is not connected to the input!") ;
124	return ;
125	}
126
127	if ( !((entry-1)%100) )
128	AliInfo(Form("%s ----> Processing event # %lld", (dynamic_cast<TChain *>(fChain))->GetFile()->GetName(), entry)) ;
129
130	// ********************** FMD ***********************************
131
132	AliESDFMD * fmd = fESD->GetFMDData() ;
c05d076f	133	fmd->CheckNeedUShort(fChain->GetFile());
1dfe075f	134
	135	Int_t nFMD1 = 0, nFMD2i = 0, nFMD2o = 0, nFMD3i = 0, nFMD3o = 0 ;
	136
	137	UShort_t detector = 1 ;
	138	for(detector = 1 ; detector <= fmd->MaxDetectors() ; detector++) {
	139	Char_t ring = 'O' ;
	140	UShort_t sector ;
	141	for(sector = 0 ;sector < fmd->MaxSectors() ; sector++) {
	142	UShort_t strip ;
	143	for(strip = 0 ; strip < fmd->MaxStrips(); strip++) {
	144	if(fmd->Multiplicity(detector, ring, sector, strip) != AliESDFMD::kInvalidMult)
	145	RingSelector(detector, ring, fmd->Multiplicity(detector, ring, sector, strip)) ;
	146	if( (fmd->Multiplicity(detector, ring, sector, strip) == AliESDFMD::kInvalidMult) && detector == 2 )
	147	nFMD2o++ ;
	148	if( (fmd->Multiplicity(detector, ring, sector, strip)==AliESDFMD::kInvalidMult) && detector == 3 )
	149	nFMD3o++ ;
	150	}
	151	}
	152	ring='I';
	153	for(sector = 0; sector < fmd->MaxSectors(); sector++) {
	154	UShort_t strip ;
	155	for(strip = 0 ; strip < fmd->MaxStrips() ; strip++) {
	156	if(fmd->Multiplicity(detector, ring, sector, strip) != AliESDFMD::kInvalidMult)
	157	RingSelector(detector, ring, fmd->Multiplicity(detector, ring, sector, strip));
	158	if( (fmd->Multiplicity(detector, ring, sector, strip) == AliESDFMD::kInvalidMult) && detector == 1 )
	159	nFMD1++;
	160	if( (fmd->Multiplicity(detector, ring, sector, strip) == AliESDFMD::kInvalidMult) && detector == 2 )
	161	nFMD2i++;
	162	if( (fmd->Multiplicity(detector, ring, sector, strip) == AliESDFMD::kInvalidMult) && detector == 3 )
	163	nFMD3i++;
	164	}
	165	}
	166	}
	167
	168	if(nFMD1>100+10240)
	169	AliWarning(Form("number of missing strips in FMD1i too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
	170	if(nFMD2i>100+10240)
	171	AliWarning(Form("number of missing strips in FMD2i too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
	172	if(nFMD2o>100+10240)
	173	AliWarning(Form("number of missing strips in FMD2o too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
	174	if(nFMD3i>100+10240)
	175	AliWarning(Form("number of missing strips in FMD3i too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
	176	if(nFMD3o>100+10240)
	177	AliWarning(Form("number of missing strips in FMD3o too high in event number %lld in file", entry, fChain->GetCurrentFile()->GetName())) ;
	178
	179	PostData(0, fOutputContainer);
	180	}
	181
	182	//______________________________________________________________________________
	183	void AliFMDQATask::Terminate(Option_t *)
	184	{
	185	// Processing when the event loop is ended
	186
	187	TCanvas * cFMD1 = new TCanvas("cFMD1", "FMD ESD Test", 400, 10, 600, 700);
	188	cFMD1->Divide(3, 2) ;
	189
	190	cFMD1->cd(1) ;;
	191	fhFMD1i->Draw() ;
	192
	193	cFMD1->cd(2) ;;
	194	fhFMD2i->Draw() ;
	195
	196	cFMD1->cd(3) ;;
	197	fhFMD2o->Draw() ;
198
199	cFMD1->cd(4) ;;
200	fhFMD3i->Draw() ;
201
202	cFMD1->cd(5) ;;
203	fhFMD3o->Draw() ;
204
205	cFMD1->Print("FMD.eps") ;
206
207	Bool_t rv1i = TestHisto(fhFMD1i) ;
208	Bool_t rv2i = TestHisto(fhFMD2i) ;
209	Bool_t rv2o = TestHisto(fhFMD2o) ;
210	Bool_t rv3i = TestHisto(fhFMD2i) ;
211	Bool_t rv3o = TestHisto(fhFMD2o) ;
212
213	if ( !(rv1i * rv2i * rv2o * rv3i * rv3o) )
214	AliWarning("Possible problem in file !!! Check output!") ;
215
216
217
218	char line[1024] ;
219	sprintf(line, ".!tar -zcvf %s.tar.gz *.eps", GetName()) ;
220	gROOT->ProcessLine(line);
221	sprintf(line, ".!rm -fR *.eps");
222	gROOT->ProcessLine(line);
223
224	AliInfo(Form("!!! All the eps files are in %s.tar.gz !!! \n", GetName())) ;
225	}
226
227	//______________________________________________________________________________
228	void AliFMDQATask::RingSelector(const UShort_t detector, const Char_t ring, const Float_t mult) const
229	{
230	// fill the histograms for each ring in each detector layer
231
232	if(ring == 'I' && detector == 1)
233	fhFMD1i->Fill(mult) ;
234	if(ring == 'I' && detector == 2)
235	fhFMD2i->Fill(mult) ;
236	if(ring == 'O' && detector == 2)
237	fhFMD2o ->Fill(mult) ;
238	if(ring == 'I' && detector == 3)
239	fhFMD3i ->Fill(mult) ;
240	if(ring == 'O' && detector == 3)
241	fhFMD3o ->Fill(mult) ;
242	}
243	//______________________________________________________________________________
244	Bool_t AliFMDQATask::TestHisto(TH1D * hTest) const
245	{
246	// analyses the histogram with a Landau function
247
248	Float_t chiMax = 3, chiLow=0.5 ;
249	Float_t chiSq ;
250	Float_t mpv ;
251	Int_t ndf ;
252
253	FitAll(hTest, chiSq, ndf, mpv, chiMax, chiLow);
254
255	if( (chiSq > chiMax \|\| chiSq < chiLow) \|\| mpv < 0.6 \|\| mpv > 1 ) {
256	hTest->Rebin(2) ;
257	FitAll(hTest, chiSq, ndf, mpv, chiMax, chiLow) ;
258	}
259
260	Bool_t ret = kFALSE ;
261	Char_t * test = "not OK";
262	Char_t * test2 = "not OK";
263
264	if(chiSq < chiMax && chiSq > chiLow)
265	test = "OK" ;
266	if(mpv > 0.6 && mpv < 1)
267	test2 = "OK" ;
268
269	if(test == "OK" && test2 == "OK")
270	ret = kTRUE;
271
272	if(test == "not OK" \|\| test2 == "not OK") {
273	AliWarning("Bad fit results") ;
274	printf("Detector : %s\n", hTest->GetName()) ;
275	printf("Landau fit Chi Square / NDF = %f / %d which is %s\n", chiSq*ndf, ndf, test) ;
276	printf("Landau fit MPV is: %f which is %s\n", mpv, test2) ;
277	}
278	return ret;
279	}
280	//______________________________________________________________________________
281	void AliFMDQATask::FitAll(TH1D* hTest, Float_t &chiSq, Int_t &ndf, Float_t &mpv, Float_t chiMax, Float_t chiLow ) const
282	{
283	// fit a histogram with a Landau distribution and returns chi square
284
285	Float_t fitMax = hTest->GetXaxis()->GetXmax() ;
286
287	TH1D hTmp = *hTest ;
288	hTmp.SetAxisRange(0.4,fitMax) ;
289	Int_t maxBin = hTmp.GetMaximumBin();
290	Float_t max = hTmp.GetBinCenter(maxBin);
291
292	hTest->Fit("landau", "QOI", "", max-0.3, fitMax) ;
293	TF1* fitfunc = hTest->GetFunction("landau") ;
294	chiSq = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
295	mpv = fitfunc->GetParameter(1) ;
296	ndf = fitfunc->GetNDF() ;
297
298	if( ( chiSq > chiMax \|\| chiSq < chiLow ) \|\| ( mpv < 0.6 \|\| mpv > 1 ) ) {
299	hTest->Fit("landau", "QOI", "", max-0.2, fitMax) ;
300	fitfunc = hTest->GetFunction("landau") ;
301	chiSq = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
302	mpv = fitfunc->GetParameter(1) ;
303	ndf = fitfunc->GetNDF() ;
304	}
305	if( ( chiSq >chiMax \|\| chiSq < chiLow ) \|\| ( mpv < 0.6 \|\| mpv > 1 ) ) {
306	hTest->Fit("landau", "QOI", "", max-0.1, fitMax) ;
307	fitfunc = hTest->GetFunction("landau") ;
308	chiSq = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
309	mpv = fitfunc->GetParameter(1) ;
310	ndf = fitfunc->GetNDF() ;
311	}
312	if( ( chiSq > chiMax \|\| chiSq <chiLow ) \|\| ( mpv < 0.6 \|\| mpv > 1 ) ) {
313	hTest->Fit("landau", "QOI", "", max, fitMax) ;
314	fitfunc = hTest->GetFunction("landau") ;
315	chiSq = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
316	mpv = fitfunc->GetParameter(1) ;
317	ndf = fitfunc->GetNDF();
318	}
319	if( ( chiSq > chiMax \|\| chiSq < chiLow ) \|\| ( mpv < 0.6 \|\|mpv > 1 ) ) {
320	hTest->Fit("landau", "QOI", "", max+0.1, fitMax) ;
321	fitfunc = hTest->GetFunction("landau") ;
322	chiSq = fitfunc->GetChisquare() / fitfunc->GetNDF() ;
323	mpv = fitfunc->GetParameter(1) ;
324	ndf = fitfunc->GetNDF() ;
325	}
326	}