[u/mrichter/AliRoot.git] / PWG4 / macros / ana.C

/* $Id:  $ */
//--------------------------------------------------
// Example macro to do analysis with the 
// analysis classes in PWG4PartCorr
// Can be executed with Root and AliRoot
//
// Pay attention to the options and definitions
// set in the lines below
//
//  Author : Gustavo Conesa Balbastre (INFN-LNF)
//
//-------------------------------------------------
enum anaModes {mLocal, mLocalCAF,mPROOF,mGRID};
//mLocal: Analyze locally files in your computer
//mLocalCAF: Analyze locally CAF files
//mPROOF: Analyze CAF files with PROOF

//---------------------------------------------------------------------------
//Settings to read locally several files, only for "mLocal" mode
//The different values are default, they can be set with environmental 
//variables: INDIR, PATTERN, NEVENT, respectivelly
char * kInDir = "/user/data/files/"; 
char * kPattern = ""; // Data are in files kInDir/kPattern+i 
Int_t kEvent = 1; // Number of files
//---------------------------------------------------------------------------
//Collection file for grid analysis
char * kXML = "collection.xml";
//---------------------------------------------------------------------------
//Scale histograms from file. Change to kTRUE when xsection file exists
//Put name of file containing xsection 
//Put number of events per ESD file
//This is an specific case for normalization of Pythia files.
const Bool_t kGetXSectionFromFileAndScale = kFALSE ;
const char * kXSFileName = "pyxsec.root";
const Int_t kNumberOfEventsPerFile = 100; 
//---------------------------------------------------------------------------

const Bool_t kMC = kTRUE; //With real data kMC = kFALSE
const TString kInputData = "ESD";//ESD, AOD, MC
TString kTreeName = "esdTree";

void ana(Int_t mode=mLocal, TString configName = "ConfigAnalysisPhoton")
{
  // Main

  //--------------------------------------------------------------------
  // Load analysis libraries
  // Look at the method below, 
  // change whatever you need for your analysis case
  // ------------------------------------------------------------------
  LoadLibraries(mode) ;
  
  //-------------------------------------------------------------------------------------------------
  //Create chain from ESD and from cross sections files, look below for options.
  //------------------------------------------------------------------------------------------------- 
  if(kInputData == "ESD") kTreeName = "esdTree" ;
  else if(kInputData == "AOD") kTreeName = "aodTree" ;
  else if (kInputData == "MC") kTreeName = "TE" ;
  else {
    cout<<"Wrong  data type "<<kInputData<<endl;
    break;
  }

  TChain *chain   = new TChain(kTreeName) ;
  TChain * chainxs = new TChain("Xsection") ;
  CreateChain(mode, chain, chainxs);  

  if(chain){
    AliLog::SetGlobalLogLevel(AliLog::kError);//Minimum prints on screen
    
    //--------------------------------------
    // Make the analysis manager
    //-------------------------------------
    AliAnalysisManager *mgr  = new AliAnalysisManager("Manager", "Manager");
    // MC handler
    if(kMC || kInputData == "MC"){
      AliMCEventHandler* mcHandler = new AliMCEventHandler();
      mcHandler->SetReadTR(kFALSE);//Do not search TrackRef file
      mgr->SetMCtruthEventHandler(mcHandler);
      if( kInputData == "MC") mgr->SetInputEventHandler(NULL);
    }

    // AOD output handler
    AliAODHandler* aodoutHandler   = new AliAODHandler();
    aodoutHandler->SetOutputFileName("aod.root");
    //aodoutHandler->SetCreateNonStandardAOD();
    mgr->SetOutputEventHandler(aodoutHandler);
    
    //input
    if(kInputData == "ESD"){
      // ESD handler
      AliESDInputHandler *esdHandler = new AliESDInputHandler();
      mgr->SetInputEventHandler(esdHandler);
    }
    if(kInputData == "AOD"){
      // AOD handler
      AliAODInputHandler *aodHandler = new AliAODInputHandler();
      mgr->SetInputEventHandler(aodHandler);
    }

    //mgr->SetDebugLevel(-1); // For debugging, do not uncomment if you want no messages.

    //-------------------------------------------------------------------------
    //Define task, put here any other task that you want to use.
    //-------------------------------------------------------------------------
    AliAnalysisTaskParticleCorrelation * taskpwg4 = new AliAnalysisTaskParticleCorrelation ("Particle");
    taskpwg4->SetConfigFileName(configName); //Default name is ConfigAnalysis
		
    mgr->AddTask(taskpwg4);
    
    // Create containers for input/output
    AliAnalysisDataContainer *cinput1 = mgr->GetCommonInputContainer();
    AliAnalysisDataContainer *coutput1 = mgr->GetCommonOutputContainer();
    AliAnalysisDataContainer *coutput2 = mgr->CreateContainer("histos", TList::Class(),
							      AliAnalysisManager::kOutputContainer, "histos.root");
    
    mgr->ConnectInput  (taskpwg4,     0, cinput1);
    mgr->ConnectOutput (taskpwg4,     0, coutput1 );
    mgr->ConnectOutput (taskpwg4,     1, coutput2 );
  
    //------------------------  
    //Scaling task
    //-----------------------
    Int_t nfiles = chainxs->GetEntries();
    //cout<<"Get? "<<kGetXSectionFromFileAndScale<<" nfiles "<<nfiles<<endl;
    if(kGetXSectionFromFileAndScale && nfiles > 0){
      //cout<<"Init AnaScale"<<endl;
      //Get the cross section
      Double_t xsection=0; 
      Float_t ntrials = 0;
      GetAverageXsection(chainxs, xsection, ntrials);
      
      AliAnaScale * scale = new AliAnaScale("scale") ;
      scale->Set(xsection/ntrials/nfiles) ;
      scale->MakeSumw2(kFALSE);//If you want histograms with error bars set to kTRUE
      //scale->SetDebugLevel(2);
      mgr->AddTask(scale);
      
      AliAnalysisDataContainer *coutput3 = mgr->CreateContainer("histosscaled", TList::Class(),
								AliAnalysisManager::kOutputContainer, "histosscaled.root");
      mgr->ConnectInput  (scale,     0, coutput2);
      mgr->ConnectOutput (scale,     0, coutput3 );
    }
    
    //-----------------------
    // Run the analysis
    //-----------------------    
    TString smode = "";
    if (mode==mLocal || mode == mLocalCAF) 
      smode = "local";
    else if (mode==mPROOF) 
      smode = "proof";
    else if (mode==mGRID) 
      smode = "local";
    
    mgr->InitAnalysis();
    mgr->PrintStatus();
    mgr->StartAnalysis(smode.Data(),chain);

cout <<" Analysis ended sucessfully "<< endl ;

  }
  else cout << "Chain was not produced ! "<<endl;
  
}

void  LoadLibraries(const anaModes mode) {
  
  //--------------------------------------
  // Load the needed libraries most of them already loaded by aliroot
  //--------------------------------------
  gSystem->Load("libTree.so");
  gSystem->Load("libGeom.so");
  gSystem->Load("libVMC.so");
  gSystem->Load("libXMLIO.so");
  
  //----------------------------------------------------------
  // >>>>>>>>>>> Local mode <<<<<<<<<<<<<< 
  //----------------------------------------------------------
  if (mode==mLocal || mode == mLocalCAF || mode == mGRID) {
    //--------------------------------------------------------
    // If you want to use already compiled libraries 
    // in the aliroot distribution
    //--------------------------------------------------------
    //gSystem->Load("libSTEERBase");
    //gSystem->Load("libESD");
    //gSystem->Load("libAOD");
    //gSystem->Load("libANALYSIS");
    //gSystem->Load("libANALYSISalice");
    //gSystem->Load("libPHOSUtils");
	//gSystem->Load("libEMCALUtils");
    //gSystem->Load("libPWG4PartCorrBase");
    //gSystem->Load("libPWG4PartCorrDep");
	
    //--------------------------------------------------------
    //If you want to use root and par files from aliroot
    //--------------------------------------------------------  
    SetupPar("STEERBase");
    SetupPar("ESD");
    SetupPar("AOD");
    SetupPar("ANALYSIS");
    SetupPar("ANALYSISalice");
	SetupPar("PHOSUtils");
	SetupPar("EMCALUtils");
	  //	//Create Geometry
//    TGeoManager::Import("geometry.root") ; //need file "geometry.root" in local dir!!!!
     SetupPar("PWG4PartCorrBase");
     SetupPar("PWG4PartCorrDep");
  }

  //---------------------------------------------------------
  // <<<<<<<<<< PROOF mode >>>>>>>>>>>>
  //---------------------------------------------------------
  else if (mode==mPROOF) {
    //
    // Connect to proof
    // Put appropriate username here
    // TProof::Reset("proof://mgheata@lxb6046.cern.ch"); 
    TProof::Open("proof://mgheata@lxb6046.cern.ch");
    
    //    gProof->ClearPackages();
    //    gProof->ClearPackage("ESD");
    //    gProof->ClearPackage("AOD");
    //    gProof->ClearPackage("ANALYSIS");   
    //    gProof->ClearPackage("PWG4PartCorrBase");
    //    gProof->ClearPackage("PWG4PartCorrDep");
    
    // Enable the STEERBase Package
    gProof->UploadPackage("STEERBase.par");
    gProof->EnablePackage("STEERBase");
    // Enable the ESD Package
    gProof->UploadPackage("ESD.par");
    gProof->EnablePackage("ESD");
    // Enable the AOD Package
    gProof->UploadPackage("AOD.par");
    gProof->EnablePackage("AOD");
    // Enable the Analysis Package
    gProof->UploadPackage("ANALYSIS.par");
    gProof->EnablePackage("ANALYSIS");
	// Enable the PHOS geometry Package
    gProof->UploadPackage("PHOSUtils.par");
    gProof->EnablePackage("PHOSUtils");
	// Enable the PHOS geometry Package
	gProof->UploadPackage("EMCALUtils.par");
	gProof->EnablePackage("EMCALUtils");	  
    // Enable PartCorr analysis
    gProof->UploadPackage("PWG4PartCorrBase.par");
    gProof->EnablePackage("PWG4PartCorrBase");
	gProof->UploadPackage("PWG4PartCorrDep.par");
    gProof->EnablePackage("PWG4PartCorrDep");    
    gProof->ShowEnabledPackages();
  }  
  
}

void SetupPar(char* pararchivename)
{
  //Load par files, create analysis libraries
  //For testing, if par file already decompressed and modified
  //classes then do not decompress.
 
  TString cdir(Form("%s", gSystem->WorkingDirectory() )) ; 
  TString parpar(Form("%s.par", pararchivename)) ; 
  if ( gSystem->AccessPathName(parpar.Data()) ) {
    gSystem->ChangeDirectory(gSystem->Getenv("ALICE_ROOT")) ;
    TString processline(Form(".! make %s", parpar.Data())) ; 
    gROOT->ProcessLine(processline.Data()) ;
    gSystem->ChangeDirectory(cdir) ; 
    processline = Form(".! mv $ALICE_ROOT/%s .", parpar.Data()) ;
    gROOT->ProcessLine(processline.Data()) ;
  } 
  if ( gSystem->AccessPathName(pararchivename) ) {  
    TString processline = Form(".! tar xvzf %s",parpar.Data()) ;
    gROOT->ProcessLine(processline.Data());
  }
  
  TString ocwd = gSystem->WorkingDirectory();
  gSystem->ChangeDirectory(pararchivename);
  
  // check for BUILD.sh and execute
  if (!gSystem->AccessPathName("PROOF-INF/BUILD.sh")) {
    printf("*******************************\n");
    printf("*** Building PAR archive    ***\n");
    cout<<pararchivename<<endl;
    printf("*******************************\n");
    
    if (gSystem->Exec("PROOF-INF/BUILD.sh")) {
      Error("runProcess","Cannot Build the PAR Archive! - Abort!");
      return -1;
    }
  }
  // check for SETUP.C and execute
  if (!gSystem->AccessPathName("PROOF-INF/SETUP.C")) {
    printf("*******************************\n");
    printf("*** Setup PAR archive       ***\n");
    cout<<pararchivename<<endl;
    printf("*******************************\n");
    gROOT->Macro("PROOF-INF/SETUP.C");
  }
  
  gSystem->ChangeDirectory(ocwd.Data());
  printf("Current dir: %s\n", ocwd.Data());
}


void CreateChain(const anaModes mode, TChain * chain, TChain * chainxs){
  //Fills chain with data
  TString ocwd = gSystem->WorkingDirectory();
  
  //-----------------------------------------------------------
  //Analysis of CAF data locally and with PROOF
  //-----------------------------------------------------------
  if(mode ==mPROOF || mode ==mLocalCAF){
    // Chain from CAF
    gROOT->LoadMacro("$ALICE_ROOT/PWG0/CreateESDChain.C");
    // The second parameter is the number of input files in the chain
    chain = CreateESDChain("ESD12001.txt", 5);  
  }
  
  //---------------------------------------
  //Local files analysis
  //---------------------------------------
  else if(mode == mLocal){    
    //If you want to add several ESD files sitting in a common directory INDIR
    //Specify as environmental variables the directory (INDIR), the number of files 
    //to analyze (NEVENT) and the pattern name of the directories with files (PATTERN)

    if(gSystem->Getenv("INDIR"))  
      kInDir = gSystem->Getenv("INDIR") ; 
    else cout<<"INDIR not set, use default: "<<kInDir<<endl;	
    
    if(gSystem->Getenv("PATTERN"))   
      kPattern = gSystem->Getenv("PATTERN") ; 
    else  cout<<"PATTERN not set, use default: "<<kPattern<<endl;
    
    if(gSystem->Getenv("NEVENT"))
      kEvent = atoi(gSystem->Getenv("NEVENT")) ;
    else cout<<"NEVENT not set, use default: "<<kEvent<<endl;
    
    //Check if env variables are set and are correct
    if ( kInDir  && kEvent) {
      printf("Get %d files from directory %s\n",kEvent,kInDir);
      if ( ! gSystem->cd(kInDir) ) {//check if ESDs directory exist
	printf("%s does not exist\n", kInDir) ;
	return ;
      }
      cout<<"INDIR : "<<kInDir<<endl;
      cout<<"NEVENT : "<<kEvent<<endl;
      cout<<"PATTERN: " <<kPattern<<endl;
      
      TString datafile="";
      if(kInputData == "ESD") datafile = "AliESDs.root" ;
      else if(kInputData == "AOD") datafile = "aod.root" ;
      else if(kInputData == "MC")  datafile = "galice.root" ;
      
      //Loop on ESD files, add them to chain
      Int_t event =0;
      Int_t skipped=0 ; 
      char file[120] ;
      char filexs[120] ;
      
      for (event = 0 ; event < kEvent ; event++) {
	sprintf(file, "%s/%s%d/%s", kInDir,kPattern,event,datafile.Data()) ; 
	sprintf(filexs, "%s/%s%d/%s", kInDir,kPattern,event,kXSFileName) ; 
	TFile * fESD = 0 ; 
	//Check if file exists and add it, if not skip it
	if ( fESD = TFile::Open(file)) {
	  if ( fESD->Get(kTreeName) ) { 
	    printf("++++ Adding %s\n", file) ;
	    chain->AddFile(file);
	    chainxs->Add(filexs) ; 
	  }
	}
	else { 
	  printf("---- Skipping %s\n", file) ;
	  skipped++ ;
	}
      }
      printf("number of entries # %lld, skipped %d\n", chain->GetEntries(), skipped) ; 	
    }
    else {
      TString input = "AliESDs.root" ;
      cout<<">>>>>> No list added, take a single file <<<<<<<<< "<<input<<endl;
      chain->AddFile(input);
    }
    
  }// local files analysis
  
  //------------------------------
  //GRID xml files
  //-----------------------------
  else if(mode == mGRID){
    //Get colection file. It is specified by the environmental
    //variable XML

    if(gSystem->Getenv("XML") )
      kXML = gSystem->Getenv("XML");
    else
      sprintf(kXML, "collection.xml") ; 
    
    if (!TFile::Open(kXML)) {
      printf("No collection file with name -- %s -- was found\n",kXML);
      return ;
    }
    else cout<<"XML file "<<kXML<<endl;

    //Load necessary libraries and connect to the GRID
    gSystem->Load("libNetx.so") ; 
    gSystem->Load("libRAliEn.so"); 
    TGrid::Connect("alien://") ;

    //Feed Grid with collection file
    //TGridCollection * collection =  (TGridCollection*)gROOT->ProcessLine(Form("TAlienCollection::Open(\"%s\", 0)", kXML));
    TGridCollection * collection = (TGridCollection*) TAlienCollection::Open(kXML);
    if (! collection) {
      AliError(Form("%s not found", kXML)) ; 
      return kFALSE ; 
    }
    TGridResult* result = collection->GetGridResult("",0 ,0);
   
    // Makes the ESD chain 
    printf("*** Getting the Chain       ***\n");
    for (Int_t index = 0; index < result->GetEntries(); index++) {
      TString alienURL = result->GetKey(index, "turl") ; 
      cout << "================== " << alienURL << endl ; 
      chain->Add(alienURL) ; 
      alienURL.ReplaceAll("AliESDs.root",kXSFileName);
      chainxs->Add(alienURL) ; 
    }
  }// xml analysis
  
  gSystem->ChangeDirectory(ocwd.Data());
}

//________________________________________________
void GetAverageXsection(TTree * tree, Double_t & xs, Float_t & ntr)
{
  // Read the PYTHIA statistics from the file pyxsec.root created by
  // the function WriteXsection():
  // integrated cross section (xsection) and
  // the  number of Pyevent() calls (ntrials)
  // and calculate the weight per one event xsection/ntrials
  // The spectrum calculated by a user should be
  // multiplied by this weight, something like this:
  // TH1F *userSpectrum ... // book and fill the spectrum
  // userSpectrum->Scale(weight)
  //
  // Yuri Kharlov 19 June 2007
  // Gustavo Conesa 15 April 2008
  Double_t xsection = 0;
  UInt_t    ntrials = 0;
  xs = 0;
  ntr = 0;
  
  Int_t nfiles =  tree->GetEntries()  ;
  if (tree && nfiles > 0) {
    tree->SetBranchAddress("xsection",&xsection);
    tree->SetBranchAddress("ntrials",&ntrials);
    for(Int_t i = 0; i < nfiles; i++){
      tree->GetEntry(i);
      xs += xsection ;
      ntr += ntrials ;
      cout << "xsection " <<xsection<<" ntrials "<<ntrials<<endl; 
    }
    
    xs =   xs /  nfiles;
    ntr =  ntr / nfiles;
    cout << "-----------------------------------------------------------------"<<endl;
    cout << "Average of "<< nfiles<<" files: xsection " <<xs<<" ntrials "<<ntr<<endl; 
    cout << "-----------------------------------------------------------------"<<endl;
  } 
  else cout << " >>>> Empty tree !!!! <<<<< "<<endl;
  
}
Commit	Line	Data
d92b41ad	1	/* $Id: $ */
d92b41ad	2	//--------------------------------------------------
	3	// Example macro to do analysis with the
	4	// analysis classes in PWG4PartCorr
	5	// Can be executed with Root and AliRoot
	6	//
	7	// Pay attention to the options and definitions
	8	// set in the lines below
	9	//
	10	// Author : Gustavo Conesa Balbastre (INFN-LNF)
	11	//
	12	//-------------------------------------------------
	13	enum anaModes {mLocal, mLocalCAF,mPROOF,mGRID};
	14	//mLocal: Analyze locally files in your computer
	15	//mLocalCAF: Analyze locally CAF files
	16	//mPROOF: Analyze CAF files with PROOF
	17
	18	//---------------------------------------------------------------------------
	19	//Settings to read locally several files, only for "mLocal" mode
	20	//The different values are default, they can be set with environmental
	21	//variables: INDIR, PATTERN, NEVENT, respectivelly
3e0577a2	22	char * kInDir = "/user/data/files/";
3e0577a2	23	char * kPattern = ""; // Data are in files kInDir/kPattern+i
d92b41ad	24	Int_t kEvent = 1; // Number of files
	25	//---------------------------------------------------------------------------
	26	//Collection file for grid analysis
	27	char * kXML = "collection.xml";
	28	//---------------------------------------------------------------------------
	29	//Scale histograms from file. Change to kTRUE when xsection file exists
	30	//Put name of file containing xsection
	31	//Put number of events per ESD file
	32	//This is an specific case for normalization of Pythia files.
	33	const Bool_t kGetXSectionFromFileAndScale = kFALSE ;
	34	const char * kXSFileName = "pyxsec.root";
	35	const Int_t kNumberOfEventsPerFile = 100;
	36	//---------------------------------------------------------------------------
	37
	38	const Bool_t kMC = kTRUE; //With real data kMC = kFALSE
7175a03a	39	const TString kInputData = "ESD";//ESD, AOD, MC
	40	TString kTreeName = "esdTree";
	41
3e0577a2	42	void ana(Int_t mode=mLocal, TString configName = "ConfigAnalysisPhoton")
d92b41ad	43	{
	44	// Main
	45
	46	//--------------------------------------------------------------------
	47	// Load analysis libraries
	48	// Look at the method below,
	49	// change whatever you need for your analysis case
	50	// ------------------------------------------------------------------
	51	LoadLibraries(mode) ;
	52
	53	//-------------------------------------------------------------------------------------------------
	54	//Create chain from ESD and from cross sections files, look below for options.
	55	//-------------------------------------------------------------------------------------------------
7175a03a	56	if(kInputData == "ESD") kTreeName = "esdTree" ;
	57	else if(kInputData == "AOD") kTreeName = "aodTree" ;
	58	else if (kInputData == "MC") kTreeName = "TE" ;
	59	else {
	60	cout<<"Wrong data type "<<kInputData<<endl;
	61	break;
	62	}
	63
	64	TChain *chain = new TChain(kTreeName) ;
d92b41ad	65	TChain * chainxs = new TChain("Xsection") ;
	66	CreateChain(mode, chain, chainxs);
	67
	68	if(chain){
	69	AliLog::SetGlobalLogLevel(AliLog::kError);//Minimum prints on screen
	70
	71	//--------------------------------------
	72	// Make the analysis manager
	73	//-------------------------------------
	74	AliAnalysisManager *mgr = new AliAnalysisManager("Manager", "Manager");
	75	// MC handler
7175a03a	76	if(kMC \|\| kInputData == "MC"){
d92b41ad	77	AliMCEventHandler* mcHandler = new AliMCEventHandler();
	78	mcHandler->SetReadTR(kFALSE);//Do not search TrackRef file
	79	mgr->SetMCtruthEventHandler(mcHandler);
1e1befe8	80	if( kInputData == "MC") mgr->SetInputEventHandler(NULL);
d92b41ad	81	}
	82
	83	// AOD output handler
	84	AliAODHandler* aodoutHandler = new AliAODHandler();
	85	aodoutHandler->SetOutputFileName("aod.root");
	86	//aodoutHandler->SetCreateNonStandardAOD();
	87	mgr->SetOutputEventHandler(aodoutHandler);
	88
	89	//input
	90	if(kInputData == "ESD"){
	91	// ESD handler
	92	AliESDInputHandler *esdHandler = new AliESDInputHandler();
	93	mgr->SetInputEventHandler(esdHandler);
	94	}
	95	if(kInputData == "AOD"){
	96	// AOD handler
	97	AliAODInputHandler *aodHandler = new AliAODInputHandler();
	98	mgr->SetInputEventHandler(aodHandler);
	99	}
	100
3e0577a2	101	//mgr->SetDebugLevel(-1); // For debugging, do not uncomment if you want no messages.
d92b41ad	102
	103	//-------------------------------------------------------------------------
	104	//Define task, put here any other task that you want to use.
	105	//-------------------------------------------------------------------------
	106	AliAnalysisTaskParticleCorrelation * taskpwg4 = new AliAnalysisTaskParticleCorrelation ("Particle");
	107	taskpwg4->SetConfigFileName(configName); //Default name is ConfigAnalysis
3e0577a2	108
d92b41ad	109	mgr->AddTask(taskpwg4);
	110
	111	// Create containers for input/output
8a546c82	112	AliAnalysisDataContainer *cinput1 = mgr->GetCommonInputContainer();
8a546c82	113	AliAnalysisDataContainer *coutput1 = mgr->GetCommonOutputContainer();
d92b41ad	114	AliAnalysisDataContainer *coutput2 = mgr->CreateContainer("histos", TList::Class(),
	115	AliAnalysisManager::kOutputContainer, "histos.root");
	116
	117	mgr->ConnectInput (taskpwg4, 0, cinput1);
	118	mgr->ConnectOutput (taskpwg4, 0, coutput1 );
	119	mgr->ConnectOutput (taskpwg4, 1, coutput2 );
	120
	121	//------------------------
	122	//Scaling task
	123	//-----------------------
	124	Int_t nfiles = chainxs->GetEntries();
3e0577a2	125	//cout<<"Get? "<<kGetXSectionFromFileAndScale<<" nfiles "<<nfiles<<endl;
d92b41ad	126	if(kGetXSectionFromFileAndScale && nfiles > 0){
3e0577a2	127	//cout<<"Init AnaScale"<<endl;
d92b41ad	128	//Get the cross section
	129	Double_t xsection=0;
	130	Float_t ntrials = 0;
	131	GetAverageXsection(chainxs, xsection, ntrials);
	132
	133	AliAnaScale * scale = new AliAnaScale("scale") ;
e5dbdaf0	134	scale->Set(xsection/ntrials/nfiles) ;
3e0577a2	135	scale->MakeSumw2(kFALSE);//If you want histograms with error bars set to kTRUE
3e0577a2	136	//scale->SetDebugLevel(2);
d92b41ad	137	mgr->AddTask(scale);
	138
	139	AliAnalysisDataContainer *coutput3 = mgr->CreateContainer("histosscaled", TList::Class(),
	140	AliAnalysisManager::kOutputContainer, "histosscaled.root");
	141	mgr->ConnectInput (scale, 0, coutput2);
	142	mgr->ConnectOutput (scale, 0, coutput3 );
	143	}
	144
	145	//-----------------------
	146	// Run the analysis
	147	//-----------------------
	148	TString smode = "";
	149	if (mode==mLocal \|\| mode == mLocalCAF)
	150	smode = "local";
	151	else if (mode==mPROOF)
	152	smode = "proof";
	153	else if (mode==mGRID)
29d1ef1d	154	smode = "local";
d92b41ad	155
	156	mgr->InitAnalysis();
	157	mgr->PrintStatus();
	158	mgr->StartAnalysis(smode.Data(),chain);
3e0577a2	159
	160	cout <<" Analysis ended sucessfully "<< endl ;
	161
d92b41ad	162	}
	163	else cout << "Chain was not produced ! "<<endl;
	164
	165	}
	166
	167	void LoadLibraries(const anaModes mode) {
	168
	169	//--------------------------------------
	170	// Load the needed libraries most of them already loaded by aliroot
	171	//--------------------------------------
	172	gSystem->Load("libTree.so");
	173	gSystem->Load("libGeom.so");
	174	gSystem->Load("libVMC.so");
	175	gSystem->Load("libXMLIO.so");
	176
	177	//----------------------------------------------------------
	178	// >>>>>>>>>>> Local mode <<<<<<<<<<<<<<
	179	//----------------------------------------------------------
	180	if (mode==mLocal \|\| mode == mLocalCAF \|\| mode == mGRID) {
	181	//--------------------------------------------------------
	182	// If you want to use already compiled libraries
	183	// in the aliroot distribution
	184	//--------------------------------------------------------
	185	//gSystem->Load("libSTEERBase");
	186	//gSystem->Load("libESD");
	187	//gSystem->Load("libAOD");
	188	//gSystem->Load("libANALYSIS");
	189	//gSystem->Load("libANALYSISalice");
3e0577a2	190	//gSystem->Load("libPHOSUtils");
e5dbdaf0	191	//gSystem->Load("libEMCALUtils");
3e0577a2	192	//gSystem->Load("libPWG4PartCorrBase");
	193	//gSystem->Load("libPWG4PartCorrDep");
	194
d92b41ad	195	//--------------------------------------------------------
	196	//If you want to use root and par files from aliroot
	197	//--------------------------------------------------------
	198	SetupPar("STEERBase");
	199	SetupPar("ESD");
	200	SetupPar("AOD");
	201	SetupPar("ANALYSIS");
	202	SetupPar("ANALYSISalice");
e5dbdaf0	203	SetupPar("PHOSUtils");
	204	SetupPar("EMCALUtils");
	205	// //Create Geometry
3e0577a2	206	// TGeoManager::Import("geometry.root") ; //need file "geometry.root" in local dir!!!!
	207	SetupPar("PWG4PartCorrBase");
	208	SetupPar("PWG4PartCorrDep");
d92b41ad	209	}
	210
	211	//---------------------------------------------------------
	212	// <<<<<<<<<< PROOF mode >>>>>>>>>>>>
	213	//---------------------------------------------------------
	214	else if (mode==mPROOF) {
	215	//
	216	// Connect to proof
	217	// Put appropriate username here
	218	// TProof::Reset("proof://mgheata@lxb6046.cern.ch");
	219	TProof::Open("proof://mgheata@lxb6046.cern.ch");
	220
	221	// gProof->ClearPackages();
	222	// gProof->ClearPackage("ESD");
	223	// gProof->ClearPackage("AOD");
	224	// gProof->ClearPackage("ANALYSIS");
3e0577a2	225	// gProof->ClearPackage("PWG4PartCorrBase");
3e0577a2	226	// gProof->ClearPackage("PWG4PartCorrDep");
d92b41ad	227
	228	// Enable the STEERBase Package
	229	gProof->UploadPackage("STEERBase.par");
	230	gProof->EnablePackage("STEERBase");
	231	// Enable the ESD Package
	232	gProof->UploadPackage("ESD.par");
	233	gProof->EnablePackage("ESD");
	234	// Enable the AOD Package
	235	gProof->UploadPackage("AOD.par");
	236	gProof->EnablePackage("AOD");
	237	// Enable the Analysis Package
	238	gProof->UploadPackage("ANALYSIS.par");
	239	gProof->EnablePackage("ANALYSIS");
3e0577a2	240	// Enable the PHOS geometry Package
e5dbdaf0	241	gProof->UploadPackage("PHOSUtils.par");
	242	gProof->EnablePackage("PHOSUtils");
	243	// Enable the PHOS geometry Package
	244	gProof->UploadPackage("EMCALUtils.par");
	245	gProof->EnablePackage("EMCALUtils");
3e0577a2	246	// Enable PartCorr analysis
	247	gProof->UploadPackage("PWG4PartCorrBase.par");
	248	gProof->EnablePackage("PWG4PartCorrBase");
	249	gProof->UploadPackage("PWG4PartCorrDep.par");
	250	gProof->EnablePackage("PWG4PartCorrDep");
d92b41ad	251	gProof->ShowEnabledPackages();
	252	}
	253
	254	}
	255
	256	void SetupPar(char* pararchivename)
	257	{
	258	//Load par files, create analysis libraries
	259	//For testing, if par file already decompressed and modified
	260	//classes then do not decompress.
	261
	262	TString cdir(Form("%s", gSystem->WorkingDirectory() )) ;
	263	TString parpar(Form("%s.par", pararchivename)) ;
	264	if ( gSystem->AccessPathName(parpar.Data()) ) {
	265	gSystem->ChangeDirectory(gSystem->Getenv("ALICE_ROOT")) ;
	266	TString processline(Form(".! make %s", parpar.Data())) ;
	267	gROOT->ProcessLine(processline.Data()) ;
	268	gSystem->ChangeDirectory(cdir) ;
3e0577a2	269	processline = Form(".! mv $ALICE_ROOT/%s .", parpar.Data()) ;
d92b41ad	270	gROOT->ProcessLine(processline.Data()) ;
	271	}
	272	if ( gSystem->AccessPathName(pararchivename) ) {
	273	TString processline = Form(".! tar xvzf %s",parpar.Data()) ;
	274	gROOT->ProcessLine(processline.Data());
	275	}
	276
	277	TString ocwd = gSystem->WorkingDirectory();
	278	gSystem->ChangeDirectory(pararchivename);
	279
	280	// check for BUILD.sh and execute
	281	if (!gSystem->AccessPathName("PROOF-INF/BUILD.sh")) {
	282	printf("*******************************\n");
	283	printf("* Building PAR archive *\n");
	284	cout<<pararchivename<<endl;
	285	printf("*******************************\n");
	286
	287	if (gSystem->Exec("PROOF-INF/BUILD.sh")) {
	288	Error("runProcess","Cannot Build the PAR Archive! - Abort!");
	289	return -1;
	290	}
	291	}
	292	// check for SETUP.C and execute
	293	if (!gSystem->AccessPathName("PROOF-INF/SETUP.C")) {
	294	printf("*******************************\n");
	295	printf("* Setup PAR archive *\n");
	296	cout<<pararchivename<<endl;
	297	printf("*******************************\n");
	298	gROOT->Macro("PROOF-INF/SETUP.C");
	299	}
	300
	301	gSystem->ChangeDirectory(ocwd.Data());
	302	printf("Current dir: %s\n", ocwd.Data());
	303	}
	304
	305
	306
	307	void CreateChain(const anaModes mode, TChain * chain, TChain * chainxs){
	308	//Fills chain with data
	309	TString ocwd = gSystem->WorkingDirectory();
	310
	311	//-----------------------------------------------------------
	312	//Analysis of CAF data locally and with PROOF
	313	//-----------------------------------------------------------
	314	if(mode ==mPROOF \|\| mode ==mLocalCAF){
	315	// Chain from CAF
	316	gROOT->LoadMacro("$ALICE_ROOT/PWG0/CreateESDChain.C");
	317	// The second parameter is the number of input files in the chain
	318	chain = CreateESDChain("ESD12001.txt", 5);
	319	}
	320
	321	//---------------------------------------
	322	//Local files analysis
	323	//---------------------------------------
	324	else if(mode == mLocal){
	325	//If you want to add several ESD files sitting in a common directory INDIR
	326	//Specify as environmental variables the directory (INDIR), the number of files
	327	//to analyze (NEVENT) and the pattern name of the directories with files (PATTERN)
	328
	329	if(gSystem->Getenv("INDIR"))
	330	kInDir = gSystem->Getenv("INDIR") ;
	331	else cout<<"INDIR not set, use default: "<<kInDir<<endl;
	332
	333	if(gSystem->Getenv("PATTERN"))
334	kPattern = gSystem->Getenv("PATTERN") ;
335	else cout<<"PATTERN not set, use default: "<<kPattern<<endl;
336
337	if(gSystem->Getenv("NEVENT"))
338	kEvent = atoi(gSystem->Getenv("NEVENT")) ;
339	else cout<<"NEVENT not set, use default: "<<kEvent<<endl;
340
341	//Check if env variables are set and are correct
342	if ( kInDir && kEvent) {
343	printf("Get %d files from directory %s\n",kEvent,kInDir);
344	if ( ! gSystem->cd(kInDir) ) {//check if ESDs directory exist
345	printf("%s does not exist\n", kInDir) ;
346	return ;
347	}
348	cout<<"INDIR : "<<kInDir<<endl;
349	cout<<"NEVENT : "<<kEvent<<endl;
350	cout<<"PATTERN: " <<kPattern<<endl;
351
7175a03a	352	TString datafile="";
	353	if(kInputData == "ESD") datafile = "AliESDs.root" ;
	354	else if(kInputData == "AOD") datafile = "aod.root" ;
	355	else if(kInputData == "MC") datafile = "galice.root" ;
	356
d92b41ad	357	//Loop on ESD files, add them to chain
	358	Int_t event =0;
	359	Int_t skipped=0 ;
	360	char file[120] ;
	361	char filexs[120] ;
	362
	363	for (event = 0 ; event < kEvent ; event++) {
7175a03a	364	sprintf(file, "%s/%s%d/%s", kInDir,kPattern,event,datafile.Data()) ;
d92b41ad	365	sprintf(filexs, "%s/%s%d/%s", kInDir,kPattern,event,kXSFileName) ;
	366	TFile * fESD = 0 ;
	367	//Check if file exists and add it, if not skip it
	368	if ( fESD = TFile::Open(file)) {
7175a03a	369	if ( fESD->Get(kTreeName) ) {
d92b41ad	370	printf("++++ Adding %s\n", file) ;
	371	chain->AddFile(file);
	372	chainxs->Add(filexs) ;
	373	}
	374	}
	375	else {
	376	printf("---- Skipping %s\n", file) ;
	377	skipped++ ;
	378	}
	379	}
1e1befe8	380	printf("number of entries # %lld, skipped %d\n", chain->GetEntries(), skipped) ;
d92b41ad	381	}
	382	else {
	383	TString input = "AliESDs.root" ;
	384	cout<<">>>>>> No list added, take a single file <<<<<<<<< "<<input<<endl;
	385	chain->AddFile(input);
	386	}
	387
	388	}// local files analysis
	389
	390	//------------------------------
	391	//GRID xml files
	392	//-----------------------------
	393	else if(mode == mGRID){
	394	//Get colection file. It is specified by the environmental
	395	//variable XML
	396
	397	if(gSystem->Getenv("XML") )
	398	kXML = gSystem->Getenv("XML");
	399	else
	400	sprintf(kXML, "collection.xml") ;
	401
	402	if (!TFile::Open(kXML)) {
	403	printf("No collection file with name -- %s -- was found\n",kXML);
	404	return ;
	405	}
	406	else cout<<"XML file "<<kXML<<endl;
	407
	408	//Load necessary libraries and connect to the GRID
	409	gSystem->Load("libNetx.so") ;
	410	gSystem->Load("libRAliEn.so");
	411	TGrid::Connect("alien://") ;
	412
	413	//Feed Grid with collection file
	414	//TGridCollection * collection = (TGridCollection*)gROOT->ProcessLine(Form("TAlienCollection::Open(\"%s\", 0)", kXML));
	415	TGridCollection * collection = (TGridCollection*) TAlienCollection::Open(kXML);
	416	if (! collection) {
	417	AliError(Form("%s not found", kXML)) ;
	418	return kFALSE ;
	419	}
	420	TGridResult* result = collection->GetGridResult("",0 ,0);
	421
	422	// Makes the ESD chain
	423	printf("* Getting the Chain *\n");
	424	for (Int_t index = 0; index < result->GetEntries(); index++) {
	425	TString alienURL = result->GetKey(index, "turl") ;
	426	cout << "================== " << alienURL << endl ;
	427	chain->Add(alienURL) ;
	428	alienURL.ReplaceAll("AliESDs.root",kXSFileName);
	429	chainxs->Add(alienURL) ;
	430	}
	431	}// xml analysis
	432
	433	gSystem->ChangeDirectory(ocwd.Data());
	434	}
	435
	436	//________________________________________________
	437	void GetAverageXsection(TTree * tree, Double_t & xs, Float_t & ntr)
	438	{
	439	// Read the PYTHIA statistics from the file pyxsec.root created by
	440	// the function WriteXsection():
	441	// integrated cross section (xsection) and
	442	// the number of Pyevent() calls (ntrials)
	443	// and calculate the weight per one event xsection/ntrials
	444	// The spectrum calculated by a user should be
445	// multiplied by this weight, something like this:
446	// TH1F *userSpectrum ... // book and fill the spectrum
447	// userSpectrum->Scale(weight)
448	//
449	// Yuri Kharlov 19 June 2007
450	// Gustavo Conesa 15 April 2008
451	Double_t xsection = 0;
452	UInt_t ntrials = 0;
453	xs = 0;
454	ntr = 0;
455
456	Int_t nfiles = tree->GetEntries() ;
457	if (tree && nfiles > 0) {
458	tree->SetBranchAddress("xsection",&xsection);
459	tree->SetBranchAddress("ntrials",&ntrials);
460	for(Int_t i = 0; i < nfiles; i++){
461	tree->GetEntry(i);
462	xs += xsection ;
463	ntr += ntrials ;
464	cout << "xsection " <<xsection<<" ntrials "<<ntrials<<endl;
465	}
466
467	xs = xs / nfiles;
468	ntr = ntr / nfiles;
469	cout << "-----------------------------------------------------------------"<<endl;
470	cout << "Average of "<< nfiles<<" files: xsection " <<xs<<" ntrials "<<ntr<<endl;
471	cout << "-----------------------------------------------------------------"<<endl;
472	}
473	else cout << " >>>> Empty tree !!!! <<<<< "<<endl;
474
475	}
476
477
478