1 /* $Id: anaGammaAnalysis.C 25095 2008-04-11 12:54:47Z schutz $ */
3 /* Revision 1.2 2007/12/13 09:45:45 gustavo
4 /* Scaling option and more comentaries added
6 /* Revision 1.1 2007/12/07 14:13:02 gustavo
7 /* Example macros for execution and configuration of the analysis
10 //---------------------------------------------------
11 // Example macro to do analysis with the
13 // Can be executed with Root and AliRoot
15 // Pay attention to the options and definitions
16 // set in the lines below
18 // Author : Gustavo Conesa Balbastre (INFN-LNF)
20 //-------------------------------------------------
21 enum anaModes {mLocal, mLocalCAF,mPROOF,mGRID};
22 //mLocal: Analyze locally files in your computer
23 //mLocalCAF: Analyze locally CAF files
24 //mPROOF: Analyze CAF files with PROOF
26 //---------------------------------------------------------------------------
27 //Settings to read locally several files, only for "mLocal" mode
28 //The different values are default, they can be set with environmental
29 //variables: INDIR, PATTERN, NEVENT, respectivelly
30 char * kInDir = "/user/data";
31 char * kPattern = ""; // Data are in diles /data/Run0,
33 Int_t kEvent = 1; // Number of files
34 //---------------------------------------------------------------------------
35 //Collection file for grid analysis
36 char * kXML = "collection.xml";
37 //---------------------------------------------------------------------------
38 //Scale histograms from file. Change to kTRUE when xsection file exists
39 //Put name of file containing xsection
40 //Put number of events per ESD file
41 //This is an specific case for normalization of Pythia files.
42 const Bool_t kGetXSectionFromFileAndScale = kFALSE ;
43 const char * kXSFileName = "pyxsec.root";
44 const Int_t kNumberOfEventsPerFile = 100;
45 //---------------------------------------------------------------------------
47 const Bool_t kMC = kTRUE; //With real data kMC = kFALSE
48 const TString kInputData = "ESD";
50 void anaExampleTask(Int_t mode=mLocal)
54 //--------------------------------------------------------------------
55 // Load analysis libraries
56 // Look at the method below,
57 // change whatever you need for your analysis case
58 // ------------------------------------------------------------------
61 //-------------------------------------------------------------------------------------------------
62 //Create chain from ESD and from cross sections files, look below for options.
63 //-------------------------------------------------------------------------------------------------
64 TChain *chain = new TChain("esdTree") ;
65 TChain * chainxs = new TChain("Xsection") ;
66 CreateChain(mode, chain, chainxs);
69 AliLog::SetGlobalLogLevel(AliLog::kError);//Minimum prints on screen
71 //--------------------------------------
72 // Make the analysis manager
73 //-------------------------------------
74 AliAnalysisManager *mgr = new AliAnalysisManager("Manager", "Manager");
77 AliMCEventHandler* mcHandler = new AliMCEventHandler();
78 mcHandler->SetReadTR(kFALSE);//Do not search TrackRef file
79 mgr->SetMCtruthEventHandler(mcHandler);
83 AliAODHandler* aodoutHandler = new AliAODHandler();
84 aodoutHandler->SetOutputFileName("aod.root");
85 //aodoutHandler->SetCreateNonStandardAOD();
86 mgr->SetOutputEventHandler(aodoutHandler);
89 if(kInputData == "ESD"){
91 AliESDInputHandler *esdHandler = new AliESDInputHandler();
92 mgr->SetInputEventHandler(esdHandler);
94 if(kInputData == "AOD"){
96 AliAODInputHandler *aodHandler = new AliAODInputHandler();
97 mgr->SetInputEventHandler(aodHandler);
100 //mgr->SetDebugLevel(10); // For debugging
102 //-------------------------------------------------------------------------
103 //Define task, put here any other task that you want to use.
104 //-------------------------------------------------------------------------
105 AliAnalysisTaskPHOSExample * taskex = new AliAnalysisTaskPHOSExample ("Gamma");
106 mgr->AddTask(taskex);
108 // Create containers for input/output
109 AliAnalysisDataContainer *cinput1 = mgr->GetCommonInputContainer();
110 AliAnalysisDataContainer *coutput1 = mgr->GetCommonOutputContainer();
111 AliAnalysisDataContainer *coutput2 = mgr->CreateContainer("histos", TList::Class(),
112 AliAnalysisManager::kOutputContainer, "histos.root");
114 mgr->ConnectInput (taskex, 0, cinput1);
115 mgr->ConnectOutput (taskex, 0, coutput1 );
116 mgr->ConnectOutput (taskex, 1, coutput2 );
118 //------------------------
120 //-----------------------
121 Int_t nfiles = chainxs->GetEntries();
122 if(kGetXSectionFromFileAndScale && nfiles > 0){
123 //Get the cross section
126 GetAverageXsection(chainxs, xsection, ntrials);
128 AliAnaScale * scale = new AliAnaScale("scale") ;
129 scale->Set(xsection/ntrials/kNumberOfEventsPerFile/nfiles) ;
132 AliAnalysisDataContainer *coutput3 = mgr->CreateContainer("histosscaled", TList::Class(),
133 AliAnalysisManager::kOutputContainer, "gammahistosscaled.root");
134 mgr->ConnectInput (scale, 0, coutput2);
135 mgr->ConnectOutput (scale, 0, coutput3 );
138 //-----------------------
140 //-----------------------
142 if (mode==mLocal || mode == mLocalCAF)
144 else if (mode==mPROOF)
146 else if (mode==mGRID)
151 mgr->StartAnalysis(smode.Data(),chain);
153 else cout << "Chain was not produced ! "<<endl;
157 void LoadLibraries(const anaModes mode) {
159 //--------------------------------------
160 // Load the needed libraries most of them already loaded by aliroot
161 //--------------------------------------
162 gSystem->Load("libTree.so");
163 gSystem->Load("libGeom.so");
164 gSystem->Load("libVMC.so");
165 gSystem->Load("libXMLIO.so");
167 //----------------------------------------------------------
168 // >>>>>>>>>>> Local mode <<<<<<<<<<<<<<
169 //----------------------------------------------------------
170 if (mode==mLocal || mode == mLocalCAF || mode == mGRID) {
171 //--------------------------------------------------------
172 // If you want to use already compiled libraries
173 // in the aliroot distribution
174 //--------------------------------------------------------
175 //gSystem->Load("libSTEERBase");
176 //gSystem->Load("libESD");
177 //gSystem->Load("libAOD");
178 //gSystem->Load("libANALYSIS");
179 //gSystem->Load("libANALYSISalice");
180 //gSystem->Load("libPWG4PartCorrBase");
181 //gSystem->Load("libPWG4PartCorrDep");
183 //--------------------------------------------------------
184 //If you want to use root and par files from aliroot
185 //--------------------------------------------------------
186 SetupPar("STEERBase");
189 SetupPar("ANALYSIS");
190 SetupPar("ANALYSISalice");
191 SetupPar("PWG4PartCorrBase");
192 SetupPar("PWG4PartCorrDep");
195 //---------------------------------------------------------
196 // <<<<<<<<<< PROOF mode >>>>>>>>>>>>
197 //---------------------------------------------------------
198 else if (mode==mPROOF) {
201 // Put appropriate username here
202 // TProof::Reset("proof://mgheata@lxb6046.cern.ch");
203 TProof::Open("proof://mgheata@lxb6046.cern.ch");
205 // Enable the STEERBase Package
206 gProof->UploadPackage("STEERBase.par");
207 gProof->EnablePackage("STEERBase");
208 // Enable the ESD Package
209 gProof->UploadPackage("ESD.par");
210 gProof->EnablePackage("ESD");
211 // Enable the AOD Package
212 gProof->UploadPackage("AOD.par");
213 gProof->EnablePackage("AOD");
214 // Enable the Analysis Package
215 gProof->UploadPackage("ANALYSIS.par");
216 gProof->EnablePackage("ANALYSIS");
217 // Enable PartCorr analysis
218 gProof->UploadPackage("PWG4PartCorrBase.par");
219 gProof->EnablePackage("PWG4PartCorrBase");
220 gProof->UploadPackage("PWG4PartCorrDep.par");
221 gProof->EnablePackage("PWG4PartCorrDep");
223 gProof->ShowEnabledPackages();
228 void SetupPar(char* pararchivename)
230 //Load par files, create analysis libraries
231 //For testing, if par file already decompressed and modified
232 //classes then do not decompress.
234 TString cdir(Form("%s", gSystem->WorkingDirectory() )) ;
235 TString parpar(Form("%s.par", pararchivename)) ;
236 if ( gSystem->AccessPathName(parpar.Data()) ) {
237 gSystem->ChangeDirectory(gSystem->Getenv("ALICE_ROOT")) ;
238 TString processline(Form(".! make %s", parpar.Data())) ;
239 gROOT->ProcessLine(processline.Data()) ;
240 gSystem->ChangeDirectory(cdir) ;
241 processline = Form(".! mv /tmp/%s .", parpar.Data()) ;
242 gROOT->ProcessLine(processline.Data()) ;
244 if ( gSystem->AccessPathName(pararchivename) ) {
245 TString processline = Form(".! tar xvzf %s",parpar.Data()) ;
246 gROOT->ProcessLine(processline.Data());
249 TString ocwd = gSystem->WorkingDirectory();
250 gSystem->ChangeDirectory(pararchivename);
252 // check for BUILD.sh and execute
253 if (!gSystem->AccessPathName("PROOF-INF/BUILD.sh")) {
254 printf("*******************************\n");
255 printf("*** Building PAR archive ***\n");
256 cout<<pararchivename<<endl;
257 printf("*******************************\n");
259 if (gSystem->Exec("PROOF-INF/BUILD.sh")) {
260 Error("runProcess","Cannot Build the PAR Archive! - Abort!");
264 // check for SETUP.C and execute
265 if (!gSystem->AccessPathName("PROOF-INF/SETUP.C")) {
266 printf("*******************************\n");
267 printf("*** Setup PAR archive ***\n");
268 cout<<pararchivename<<endl;
269 printf("*******************************\n");
270 gROOT->Macro("PROOF-INF/SETUP.C");
273 gSystem->ChangeDirectory(ocwd.Data());
274 printf("Current dir: %s\n", ocwd.Data());
279 void CreateChain(const anaModes mode, TChain * chain, TChain * chainxs){
280 //Fills chain with data
281 TString ocwd = gSystem->WorkingDirectory();
283 //-----------------------------------------------------------
284 //Analysis of CAF data locally and with PROOF
285 //-----------------------------------------------------------
286 if(mode ==mPROOF || mode ==mLocalCAF){
288 gROOT->LoadMacro("$ALICE_ROOT/PWG0/CreateESDChain.C");
289 // The second parameter is the number of input files in the chain
290 chain = CreateESDChain("ESD12001.txt", 5);
293 //---------------------------------------
294 //Local files analysis
295 //---------------------------------------
296 else if(mode == mLocal){
297 //If you want to add several ESD files sitting in a common directory INDIR
298 //Specify as environmental variables the directory (INDIR), the number of files
299 //to analyze (NEVENT) and the pattern name of the directories with files (PATTERN)
301 if(gSystem->Getenv("INDIR"))
302 kInDir = gSystem->Getenv("INDIR") ;
303 else cout<<"INDIR not set, use default: "<<kInDir<<endl;
305 if(gSystem->Getenv("PATTERN"))
306 kPattern = gSystem->Getenv("PATTERN") ;
307 else cout<<"PATTERN not set, use default: "<<kPattern<<endl;
309 if(gSystem->Getenv("NEVENT"))
310 kEvent = atoi(gSystem->Getenv("NEVENT")) ;
311 else cout<<"NEVENT not set, use default: "<<kEvent<<endl;
313 //Check if env variables are set and are correct
314 if ( kInDir && kEvent) {
315 printf("Get %d files from directory %s\n",kEvent,kInDir);
316 if ( ! gSystem->cd(kInDir) ) {//check if ESDs directory exist
317 printf("%s does not exist\n", kInDir) ;
320 cout<<"INDIR : "<<kInDir<<endl;
321 cout<<"NEVENT : "<<kEvent<<endl;
322 cout<<"PATTERN: " <<kPattern<<endl;
324 //Loop on ESD files, add them to chain
330 for (event = 0 ; event < kEvent ; event++) {
331 sprintf(file, "%s/%s%d/AliESDs.root", kInDir,kPattern,event) ;
332 sprintf(filexs, "%s/%s%d/%s", kInDir,kPattern,event,kXSFileName) ;
334 //Check if file exists and add it, if not skip it
335 if ( fESD = TFile::Open(file)) {
336 if ( fESD->Get("esdTree") ) {
337 printf("++++ Adding %s\n", file) ;
338 chain->AddFile(file);
339 chainxs->Add(filexs) ;
343 printf("---- Skipping %s\n", file) ;
347 printf("number of entries # %lld, skipped %d\n", chain->GetEntries(), skipped*100) ;
350 TString input = "AliESDs.root" ;
351 cout<<">>>>>> No list added, take a single file <<<<<<<<< "<<input<<endl;
352 chain->AddFile(input);
355 }// local files analysis
357 //------------------------------
359 //-----------------------------
360 else if(mode == mGRID){
361 //Get colection file. It is specified by the environmental
364 if(gSystem->Getenv("XML") )
365 kXML = gSystem->Getenv("XML");
367 sprintf(kXML, "collection.xml") ;
369 if (!TFile::Open(kXML)) {
370 printf("No collection file with name -- %s -- was found\n",kXML);
373 else cout<<"XML file "<<kXML<<endl;
375 //Load necessary libraries and connect to the GRID
376 gSystem->Load("libNetx.so") ;
377 gSystem->Load("libRAliEn.so");
378 TGrid::Connect("alien://") ;
380 //Feed Grid with collection file
381 //TGridCollection * collection = (TGridCollection*)gROOT->ProcessLine(Form("TAlienCollection::Open(\"%s\", 0)", kXML));
382 TGridCollection * collection = (TGridCollection*) TAlienCollection::Open(kXML);
384 AliError(Form("%s not found", kXML)) ;
387 TGridResult* result = collection->GetGridResult("",0 ,0);
389 // Makes the ESD chain
390 printf("*** Getting the Chain ***\n");
391 for (Int_t index = 0; index < result->GetEntries(); index++) {
392 TString alienURL = result->GetKey(index, "turl") ;
393 cout << "================== " << alienURL << endl ;
394 chain->Add(alienURL) ;
395 alienURL.ReplaceAll("AliESDs.root",kXSFileName);
396 chainxs->Add(alienURL) ;
400 gSystem->ChangeDirectory(ocwd.Data());
403 //________________________________________________
404 void GetAverageXsection(TTree * tree, Double_t & xs, Float_t & ntr)
406 // Read the PYTHIA statistics from the file pyxsec.root created by
407 // the function WriteXsection():
408 // integrated cross section (xsection) and
409 // the number of Pyevent() calls (ntrials)
410 // and calculate the weight per one event xsection/ntrials
411 // The spectrum calculated by a user should be
412 // multiplied by this weight, something like this:
413 // TH1F *userSpectrum ... // book and fill the spectrum
414 // userSpectrum->Scale(weight)
416 // Yuri Kharlov 19 June 2007
417 // Gustavo Conesa 15 April 2008
418 Double_t xsection = 0;
423 Int_t nfiles = tree->GetEntries() ;
424 if (tree && nfiles > 0) {
425 tree->SetBranchAddress("xsection",&xsection);
426 tree->SetBranchAddress("ntrials",&ntrials);
427 for(Int_t i = 0; i < nfiles; i++){
431 cout << "xsection " <<xsection<<" ntrials "<<ntrials<<endl;
436 cout << "-----------------------------------------------------------------"<<endl;
437 cout << "Average of "<< nfiles<<" files: xsection " <<xs<<" ntrials "<<ntr<<endl;
438 cout << "-----------------------------------------------------------------"<<endl;
440 else cout << " >>>> Empty tree !!!! <<<<< "<<endl;