New more general analysis implemention for particle identification and correlation...
[u/mrichter/AliRoot.git] / PWG4 / macros / ana.C
CommitLineData
d92b41ad 1/* $Id: $ */
2/* $Log$
3/* */
4
5//--------------------------------------------------
6// Example macro to do analysis with the
7// analysis classes in PWG4PartCorr
8// Can be executed with Root and AliRoot
9//
10// Pay attention to the options and definitions
11// set in the lines below
12//
13// Author : Gustavo Conesa Balbastre (INFN-LNF)
14//
15//-------------------------------------------------
16enum anaModes {mLocal, mLocalCAF,mPROOF,mGRID};
17//mLocal: Analyze locally files in your computer
18//mLocalCAF: Analyze locally CAF files
19//mPROOF: Analyze CAF files with PROOF
20
21//---------------------------------------------------------------------------
22//Settings to read locally several files, only for "mLocal" mode
23//The different values are default, they can be set with environmental
24//variables: INDIR, PATTERN, NEVENT, respectivelly
25char * kInDir = "/home/user/data";
26char * kPattern = ""; // Data are in diles /data/Run0,
27// /Data/Run1 ...
28Int_t kEvent = 1; // Number of files
29//---------------------------------------------------------------------------
30//Collection file for grid analysis
31char * kXML = "collection.xml";
32//---------------------------------------------------------------------------
33//Scale histograms from file. Change to kTRUE when xsection file exists
34//Put name of file containing xsection
35//Put number of events per ESD file
36//This is an specific case for normalization of Pythia files.
37const Bool_t kGetXSectionFromFileAndScale = kFALSE ;
38const char * kXSFileName = "pyxsec.root";
39const Int_t kNumberOfEventsPerFile = 100;
40//---------------------------------------------------------------------------
41
42const Bool_t kMC = kTRUE; //With real data kMC = kFALSE
43const TString kInputData = "ESD";
44void ana(Int_t mode=mLocal, TString configName = "ConfigAnalysisESDExample")
45{
46 // Main
47
48 //--------------------------------------------------------------------
49 // Load analysis libraries
50 // Look at the method below,
51 // change whatever you need for your analysis case
52 // ------------------------------------------------------------------
53 LoadLibraries(mode) ;
54
55 //-------------------------------------------------------------------------------------------------
56 //Create chain from ESD and from cross sections files, look below for options.
57 //-------------------------------------------------------------------------------------------------
58 TChain *chain = new TChain("esdTree") ;
59 TChain * chainxs = new TChain("Xsection") ;
60 CreateChain(mode, chain, chainxs);
61
62 if(chain){
63 AliLog::SetGlobalLogLevel(AliLog::kError);//Minimum prints on screen
64
65 //--------------------------------------
66 // Make the analysis manager
67 //-------------------------------------
68 AliAnalysisManager *mgr = new AliAnalysisManager("Manager", "Manager");
69 // MC handler
70 if(kMC){
71 AliMCEventHandler* mcHandler = new AliMCEventHandler();
72 mcHandler->SetReadTR(kFALSE);//Do not search TrackRef file
73 mgr->SetMCtruthEventHandler(mcHandler);
74 }
75
76 // AOD output handler
77 AliAODHandler* aodoutHandler = new AliAODHandler();
78 aodoutHandler->SetOutputFileName("aod.root");
79 //aodoutHandler->SetCreateNonStandardAOD();
80 mgr->SetOutputEventHandler(aodoutHandler);
81
82 //input
83 if(kInputData == "ESD"){
84 // ESD handler
85 AliESDInputHandler *esdHandler = new AliESDInputHandler();
86 mgr->SetInputEventHandler(esdHandler);
87 }
88 if(kInputData == "AOD"){
89 // AOD handler
90 AliAODInputHandler *aodHandler = new AliAODInputHandler();
91 mgr->SetInputEventHandler(aodHandler);
92 }
93
94 //mgr->SetDebugLevel(10); // For debugging
95
96 //-------------------------------------------------------------------------
97 //Define task, put here any other task that you want to use.
98 //-------------------------------------------------------------------------
99 AliAnalysisTaskParticleCorrelation * taskpwg4 = new AliAnalysisTaskParticleCorrelation ("Particle");
100 taskpwg4->SetConfigFileName(configName); //Default name is ConfigAnalysis
101 mgr->AddTask(taskpwg4);
102
103 // Create containers for input/output
104 AliAnalysisDataContainer *cinput1 = mgr->CreateContainer("cchain",TChain::Class(),
105 AliAnalysisManager::kInputContainer);
106 AliAnalysisDataContainer *coutput1 = mgr->CreateContainer("tree", TTree::Class(),
107 AliAnalysisManager::kOutputContainer, "default");
108 AliAnalysisDataContainer *coutput2 = mgr->CreateContainer("histos", TList::Class(),
109 AliAnalysisManager::kOutputContainer, "histos.root");
110
111 mgr->ConnectInput (taskpwg4, 0, cinput1);
112 mgr->ConnectOutput (taskpwg4, 0, coutput1 );
113 mgr->ConnectOutput (taskpwg4, 1, coutput2 );
114
115 //------------------------
116 //Scaling task
117 //-----------------------
118 Int_t nfiles = chainxs->GetEntries();
119 if(kGetXSectionFromFileAndScale && nfiles > 0){
120 //Get the cross section
121 Double_t xsection=0;
122 Float_t ntrials = 0;
123 GetAverageXsection(chainxs, xsection, ntrials);
124
125 AliAnaScale * scale = new AliAnaScale("scale") ;
126 scale->Set(xsection/ntrials/kNumberOfEventsPerFile/nfiles) ;
127 mgr->AddTask(scale);
128
129 AliAnalysisDataContainer *coutput3 = mgr->CreateContainer("histosscaled", TList::Class(),
130 AliAnalysisManager::kOutputContainer, "histosscaled.root");
131 mgr->ConnectInput (scale, 0, coutput2);
132 mgr->ConnectOutput (scale, 0, coutput3 );
133 }
134
135 //-----------------------
136 // Run the analysis
137 //-----------------------
138 TString smode = "";
139 if (mode==mLocal || mode == mLocalCAF)
140 smode = "local";
141 else if (mode==mPROOF)
142 smode = "proof";
143 else if (mode==mGRID)
144 smode = "grid";
145
146 mgr->InitAnalysis();
147 mgr->PrintStatus();
148 mgr->StartAnalysis(smode.Data(),chain);
149 }
150 else cout << "Chain was not produced ! "<<endl;
151
152}
153
154void LoadLibraries(const anaModes mode) {
155
156 //--------------------------------------
157 // Load the needed libraries most of them already loaded by aliroot
158 //--------------------------------------
159 gSystem->Load("libTree.so");
160 gSystem->Load("libGeom.so");
161 gSystem->Load("libVMC.so");
162 gSystem->Load("libXMLIO.so");
163
164 //----------------------------------------------------------
165 // >>>>>>>>>>> Local mode <<<<<<<<<<<<<<
166 //----------------------------------------------------------
167 if (mode==mLocal || mode == mLocalCAF || mode == mGRID) {
168 //--------------------------------------------------------
169 // If you want to use already compiled libraries
170 // in the aliroot distribution
171 //--------------------------------------------------------
172 //gSystem->Load("libSTEERBase");
173 //gSystem->Load("libESD");
174 //gSystem->Load("libAOD");
175 //gSystem->Load("libANALYSIS");
176 //gSystem->Load("libANALYSISalice");
177 //gSystem->Load("libPWG4PartCorr");
178
179 //--------------------------------------------------------
180 //If you want to use root and par files from aliroot
181 //--------------------------------------------------------
182 SetupPar("STEERBase");
183 SetupPar("ESD");
184 SetupPar("AOD");
185 SetupPar("ANALYSIS");
186 SetupPar("ANALYSISalice");
187 SetupPar("PWG4PartCorr");
188
189 }
190
191 //---------------------------------------------------------
192 // <<<<<<<<<< PROOF mode >>>>>>>>>>>>
193 //---------------------------------------------------------
194 else if (mode==mPROOF) {
195 //
196 // Connect to proof
197 // Put appropriate username here
198 // TProof::Reset("proof://mgheata@lxb6046.cern.ch");
199 TProof::Open("proof://mgheata@lxb6046.cern.ch");
200
201 // gProof->ClearPackages();
202 // gProof->ClearPackage("ESD");
203 // gProof->ClearPackage("AOD");
204 // gProof->ClearPackage("ANALYSIS");
205 // gProof->ClearPackage("PWG4PartCorr");
206
207 // Enable the STEERBase Package
208 gProof->UploadPackage("STEERBase.par");
209 gProof->EnablePackage("STEERBase");
210 // Enable the ESD Package
211 gProof->UploadPackage("ESD.par");
212 gProof->EnablePackage("ESD");
213 // Enable the AOD Package
214 gProof->UploadPackage("AOD.par");
215 gProof->EnablePackage("AOD");
216 // Enable the Analysis Package
217 gProof->UploadPackage("ANALYSIS.par");
218 gProof->EnablePackage("ANALYSIS");
219 // Enable gamma jet analysis
220 gProof->UploadPackage("PWG4PartCorr.par");
221 gProof->EnablePackage("PWG4PartCorr");
222 //
223 gProof->ShowEnabledPackages();
224 }
225
226}
227
228void SetupPar(char* pararchivename)
229{
230 //Load par files, create analysis libraries
231 //For testing, if par file already decompressed and modified
232 //classes then do not decompress.
233
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()) ;
243 }
244 if ( gSystem->AccessPathName(pararchivename) ) {
245 TString processline = Form(".! tar xvzf %s",parpar.Data()) ;
246 gROOT->ProcessLine(processline.Data());
247 }
248
249 TString ocwd = gSystem->WorkingDirectory();
250 gSystem->ChangeDirectory(pararchivename);
251
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");
258
259 if (gSystem->Exec("PROOF-INF/BUILD.sh")) {
260 Error("runProcess","Cannot Build the PAR Archive! - Abort!");
261 return -1;
262 }
263 }
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");
271 }
272
273 gSystem->ChangeDirectory(ocwd.Data());
274 printf("Current dir: %s\n", ocwd.Data());
275}
276
277
278
279void CreateChain(const anaModes mode, TChain * chain, TChain * chainxs){
280 //Fills chain with data
281 TString ocwd = gSystem->WorkingDirectory();
282
283 //-----------------------------------------------------------
284 //Analysis of CAF data locally and with PROOF
285 //-----------------------------------------------------------
286 if(mode ==mPROOF || mode ==mLocalCAF){
287 // Chain from CAF
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);
291 }
292
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)
300
301 if(gSystem->Getenv("INDIR"))
302 kInDir = gSystem->Getenv("INDIR") ;
303 else cout<<"INDIR not set, use default: "<<kInDir<<endl;
304
305 if(gSystem->Getenv("PATTERN"))
306 kPattern = gSystem->Getenv("PATTERN") ;
307 else cout<<"PATTERN not set, use default: "<<kPattern<<endl;
308
309 if(gSystem->Getenv("NEVENT"))
310 kEvent = atoi(gSystem->Getenv("NEVENT")) ;
311 else cout<<"NEVENT not set, use default: "<<kEvent<<endl;
312
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) ;
318 return ;
319 }
320 cout<<"INDIR : "<<kInDir<<endl;
321 cout<<"NEVENT : "<<kEvent<<endl;
322 cout<<"PATTERN: " <<kPattern<<endl;
323
324 //Loop on ESD files, add them to chain
325 Int_t event =0;
326 Int_t skipped=0 ;
327 char file[120] ;
328 char filexs[120] ;
329
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) ;
333 TFile * fESD = 0 ;
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) ;
340 }
341 }
342 else {
343 printf("---- Skipping %s\n", file) ;
344 skipped++ ;
345 }
346 }
347 printf("number of entries # %lld, skipped %d\n", chain->GetEntries(), skipped*100) ;
348 }
349 else {
350 TString input = "AliESDs.root" ;
351 cout<<">>>>>> No list added, take a single file <<<<<<<<< "<<input<<endl;
352 chain->AddFile(input);
353 }
354
355 }// local files analysis
356
357 //------------------------------
358 //GRID xml files
359 //-----------------------------
360 else if(mode == mGRID){
361 //Get colection file. It is specified by the environmental
362 //variable XML
363
364 if(gSystem->Getenv("XML") )
365 kXML = gSystem->Getenv("XML");
366 else
367 sprintf(kXML, "collection.xml") ;
368
369 if (!TFile::Open(kXML)) {
370 printf("No collection file with name -- %s -- was found\n",kXML);
371 return ;
372 }
373 else cout<<"XML file "<<kXML<<endl;
374
375 //Load necessary libraries and connect to the GRID
376 gSystem->Load("libNetx.so") ;
377 gSystem->Load("libRAliEn.so");
378 TGrid::Connect("alien://") ;
379
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);
383 if (! collection) {
384 AliError(Form("%s not found", kXML)) ;
385 return kFALSE ;
386 }
387 TGridResult* result = collection->GetGridResult("",0 ,0);
388
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) ;
397 }
398 }// xml analysis
399
400 gSystem->ChangeDirectory(ocwd.Data());
401}
402
403//________________________________________________
404void GetAverageXsection(TTree * tree, Double_t & xs, Float_t & ntr)
405{
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)
415 //
416 // Yuri Kharlov 19 June 2007
417 // Gustavo Conesa 15 April 2008
418 Double_t xsection = 0;
419 UInt_t ntrials = 0;
420 xs = 0;
421 ntr = 0;
422
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++){
428 tree->GetEntry(i);
429 xs += xsection ;
430 ntr += ntrials ;
431 cout << "xsection " <<xsection<<" ntrials "<<ntrials<<endl;
432 }
433
434 xs = xs / nfiles;
435 ntr = ntr / nfiles;
436 cout << "-----------------------------------------------------------------"<<endl;
437 cout << "Average of "<< nfiles<<" files: xsection " <<xs<<" ntrials "<<ntr<<endl;
438 cout << "-----------------------------------------------------------------"<<endl;
439 }
440 else cout << " >>>> Empty tree !!!! <<<<< "<<endl;
441
442}
443
444
445