ba411f00a128a479f0bee2dd8157709b892ddd58
[u/mrichter/AliRoot.git] / PWG0 / AliCorrection.cxx
1 /* $Id$ */
2
3 // ------------------------------------------------------
4 //
5 // Class to handle corrections.
6 //
7 // ------------------------------------------------------
8 //
9
10 #include <TFile.h>
11 #include <TCanvas.h>
12 #include <TH3F.h>
13 #include <TH2F.h>
14 #include <TMath.h>
15
16 #include <AliLog.h>
17 #include "AliCorrectionMatrix2D.h"
18 #include "AliCorrectionMatrix3D.h"
19
20 #include "AliCorrection.h"
21
22 //____________________________________________________________________
23 ClassImp(AliCorrection)
24
25 //____________________________________________________________________
26 AliCorrection::AliCorrection() : TNamed(),
27   fEventCorr(0),
28   fTrackCorr(0)
29 {
30   // default constructor
31 }
32
33 //____________________________________________________________________
34 AliCorrection::AliCorrection(const Char_t* name, const Char_t* title, AliPWG0Helper::AnalysisMode analysisMode) : TNamed(name, title),
35   fEventCorr(0),
36   fTrackCorr(0)
37 {
38   // constructor initializing tnamed
39
40   Float_t* binLimitsPt = 0;
41   Int_t nBinsPt = 0;
42
43   // different binnings, better solution could be anticipated...
44   if ((analysisMode & AliPWG0Helper::kTPC || analysisMode & AliPWG0Helper::kTPCITS) && (analysisMode & AliPWG0Helper::kFieldOn))
45   {
46     static Float_t binLimitsPtTmp[] = {0.0, 0.05, 0.1, 0.125, 0.15, 0.175, 0.2, 0.225, 0.25, 0.275, 0.3, 0.325, 0.35, 0.375, 0.4, 0.425, 0.45, 0.475, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.5, 2.0, 5.0, 10.0, 100.0};
47     //static Float_t binLimitsPtTmp[] = {0.0, 0.05, 0.1, 0.125, 0.15, 0.175, 0.2, 0.225, 0.25, 0.275, 0.3, 0.325, 0.35, 0.375, 0.4, 0.425, 0.45, 0.475, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 2.0, 5.0, 10.0, 100.0};
48     binLimitsPt = (Float_t*) binLimitsPtTmp;
49     nBinsPt = 28;
50   }
51   else if (analysisMode & AliPWG0Helper::kSPD || !(analysisMode & AliPWG0Helper::kFieldOn))
52   {
53     static Float_t binLimitsPtTmp[] = {-0.5, 100.0};
54     binLimitsPt = (Float_t*) binLimitsPtTmp;
55     nBinsPt = 1;
56   }
57
58   if (!binLimitsPt)
59   {
60     Printf("FATAL: Invalid binning");
61     return;
62   }
63
64   // third axis for track histogram
65   Int_t nBinsN2 = 1;
66   Float_t binLimitsN2[]   = {-0.5, 1000};
67   const char* title3 = "Ntracks";
68   
69   //Int_t nBinsN2 = 21;
70   //Float_t binLimitsN2[]   = {-0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5, 10.5, 12.5, 14.5, 16.5, 18.5, 20.5, 25.5, 30.5, 40.5, 50.5, 100.5, 1000.5};
71   
72   // phi
73   //Int_t nBinsN2 = 36;
74   //Float_t binLimitsN2[]   = {0.000, 0.175, 0.349, 0.524, 0.698, 0.873, 1.047, 1.222, 1.396, 1.571, 1.745, 1.920, 2.094, 2.269, 2.443, 2.618, 2.793, 2.967, 3.142, 3.316, 3.491, 3.665, 3.840, 4.014, 4.189, 4.363, 4.538, 4.712, 4.887, 5.061, 5.236, 5.411, 5.585, 5.760, 5.934, 6.109, TMath::Pi() * 2};
75   //const char* title3 = "#phi";
76
77   // mult axis for event histogram
78   Int_t nBinsN = 22;
79   Float_t binLimitsN[]   = {-0.5, 0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5, 10.5, 12.5, 14.5, 16.5, 18.5, 20.5, 25.5, 30.5, 40.5, 50.5, 100.5, 300.5};
80   //Int_t nBinsN = 52;
81   //Float_t binLimitsN[]   = {-0.5, 0.5, 1.5, 2.5, 3.5, 4.5, 5.5, 6.5, 7.5, 8.5, 9.5, 10.5, 11.5, 12.5, 13.5, 14.5, 15.5, 16.5, 17.5, 18.5, 19.5, 20.5, 21.5, 22.5, 23.5, 24.5, 25.5, 26.5, 27.5, 28.5, 29.5, 30.5, 31.5, 32.5, 33.5, 34.5, 35.5, 36.5, 37.5, 38.5, 39.5, 40.5, 41.5, 42.5, 43.5, 44.5, 45.5, 46.5, 47.5, 48.5, 49.5, 50.5, 100.5, 300.5};
82
83   //Float_t binLimitsVtx[] = {-20,-15,-10,-6,-3,0,3,6,10,15,20};
84   //Float_t binLimitsVtx[] = {-20,-19,-18,-17,-16,-15,-14,-13,-12,-11,-10,-9,-8,-7,-6,-5,-4,-3,-2,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20};
85   Float_t binLimitsVtx[] = {-30,-25,-20,-15,-10,-8,-6,-4,-2,0,2,4,6,8,10,15,20,25,30};
86   /*Float_t binLimitsEta[] = {-3.0,-2.8,-2.6,-2.4,-2.2,
87                             -2.0,-1.8,-1.6,-1.4,-1.2,
88                             -1.0,-0.8,-0.6,-0.4,-0.2, 0.0,
89                              0.2, 0.4, 0.6, 0.8, 1.0,
90                              1.2, 1.4, 1.6, 1.8, 2.0,
91                              2.2, 2.4, 2.6, 2.8, 3.0};*/
92   //Float_t binLimitsEta[] = { -3.0, -2.9, -2.8, -2.7, -2.6, -2.5, -2.4, -2.3, -2.2, -2.1, -2.0, -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, -1.2, -1.1, -1.0, -0.9, -0.8, -0.7, -0.6, -0.5, -0.4, -0.3, -0.2, -0.1, -0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0 };
93   /*Float_t binLimitsEta[] = {-3,-2.75,-2.5,-2.25,-2.0,
94                             -1.75,-1.5,-1.25,
95                             -1,-0.75,-0.5,-0.25,
96                             0,0.25,0.5,0.75,
97                             1.0,1.25,1.5,1.75,
98                             2.0,2.25,2.5,2.75,3.0}; */
99   Float_t binLimitsEta[] = {-2.8,-2.4,-2,-1.6,-1.2,-0.8,-0.4,0,0.4,0.8,1.2,1.6,2.0,2.4,2.8}; 
100   //Float_t binLimitsEta[] = {-2.8,-2.4,-2,-1.6,-1.2,-0.8,-0.5,0,0.5,0.8,1.2,1.6,2.0,2.4,2.8}; 
101
102   //Float_t binLimitsEta[] = {-3,-2.6,-2.2,-1.8,-1.4,-1,-0.6,-0.2,0.2,0.6,1,1.4,1.8,2.2,2.6,3.0};
103 //  Float_t binLimitsEta[] = {-2,-1.9,-1.8,-1.7,-1.6,-1.5,-1.4,-1.3,-1.2,-1.1,-1.0,-0.9,-0.8,-0.7,-0.6,-0.5,-0.4,-0.3,-0.2,-0.1,0.0,0.1,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9,1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9,2.0};
104 //  Float_t binLimitsEta[] = { -7.0, -6.9, -6.8, -6.7, -6.6, -6.5, -6.4, -6.3, -6.2, -6.1, -6.0, -5.9, -5.8, -5.7, -5.6, -5.5, -5.4, -5.3, -5.2, -5.1, -5.0, -4.9, -4.8, -4.7, -4.6, -4.5, -4.4, -4.3, -4.2, -4.1, -4.0, -3.9, -3.8, -3.7, -3.6, -3.5, -3.4, -3.3, -3.2, -3.1, -3.0, -2.9, -2.8, -2.7, -2.6, -2.5, -2.4, -2.3, -2.2, -2.1, -2.0, -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, -1.2, -1.1, -1.0, -0.9, -0.8, -0.7, -0.6, -0.5, -0.4, -0.3, -0.2, -0.1, -0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0 };
105
106   fEventCorr = new AliCorrectionMatrix2D("EventCorrection", Form("%s EventCorrection", fTitle.Data()), 18, binLimitsVtx, nBinsN, binLimitsN);
107
108   if (analysisMode & AliPWG0Helper::kSPD)
109   {
110     TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",18, binLimitsVtx, 14, binLimitsEta, nBinsN2, binLimitsN2);
111     fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
112     fTrackCorr->SetAxisTitles("vtx-z (cm)", "#eta", title3);
113     delete dummyBinning;
114   }
115   else
116   {
117     TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",18, binLimitsVtx, 14, binLimitsEta , nBinsPt, binLimitsPt);
118     fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
119     fTrackCorr->SetAxisTitles("vtx-z (cm)", "#eta", "p_{T} (GeV/c)");
120     delete dummyBinning;
121   }
122
123
124   fEventCorr->SetAxisTitles("vtx-z (cm)", "Ntracks");
125 }
126
127 //____________________________________________________________________
128 AliCorrection::AliCorrection(const AliCorrection& c) : TNamed(c),
129   fEventCorr(0),
130   fTrackCorr(0)
131 {
132   // copy constructor
133   ((AliCorrection &)c).Copy(*this);
134 }
135
136 //____________________________________________________________________
137 AliCorrection::~AliCorrection()
138 {
139   //
140   // destructor
141   //
142
143   if (fEventCorr)
144   {
145     delete fEventCorr;
146     fEventCorr = 0;
147   }
148
149   if (fTrackCorr)
150   {
151     delete fTrackCorr;
152     fTrackCorr = 0;
153   }
154 }
155
156 //____________________________________________________________________
157 AliCorrection &AliCorrection::operator=(const AliCorrection &c)
158 {
159   // assigment operator
160
161   if (this != &c)
162     ((AliCorrection &) c).Copy(*this);
163
164   return *this;
165 }
166
167 //____________________________________________________________________
168 void AliCorrection::Copy(TObject& c) const
169 {
170   // copy function
171
172   AliCorrection& target = (AliCorrection &) c;
173
174   if (fEventCorr)
175     target.fEventCorr = dynamic_cast<AliCorrectionMatrix2D*> (fEventCorr->Clone());
176
177   if (fTrackCorr)
178     target.fTrackCorr = dynamic_cast<AliCorrectionMatrix3D*> (fTrackCorr->Clone());
179 }
180
181 //____________________________________________________________________
182 Long64_t AliCorrection::Merge(TCollection* list)
183 {
184   // Merge a list of AliCorrection objects with this (needed for
185   // PROOF). 
186   // Returns the number of merged objects (including this).
187
188   if (!list)
189     return 0;
190   
191   if (list->IsEmpty())
192     return 1;
193
194   TIterator* iter = list->MakeIterator();
195   TObject* obj;
196
197   // collections of measured and generated histograms
198   TList* collectionEvent = new TList;
199   TList* collectionTrack = new TList;
200   
201   Int_t count = 0;
202   while ((obj = iter->Next())) {
203     
204     AliCorrection* entry = dynamic_cast<AliCorrection*> (obj);
205     if (entry == 0) 
206       continue;
207
208     collectionEvent->Add(entry->fEventCorr);
209     collectionTrack->Add(entry->fTrackCorr);
210
211     count++;
212   }
213   fEventCorr->Merge(collectionEvent);
214   fTrackCorr->Merge(collectionTrack);
215
216   delete collectionEvent;
217   delete collectionTrack;
218
219   return count+1;
220 }
221
222 //____________________________________________________________________
223 void AliCorrection::Divide()
224 {
225   //
226   // divide the histograms to get the correction
227   //
228   
229   if (!fEventCorr || !fTrackCorr)
230     return;
231     
232   fEventCorr->Divide();
233   fTrackCorr->Divide();
234
235   Int_t emptyBins = fTrackCorr->CheckEmptyBins(-9.99, 9.99, -0.79, 0.79, 0.2, 4.9);
236   printf("INFO: In the central region the track correction of %s has %d empty bins\n", GetName(), emptyBins);
237 }
238
239 //____________________________________________________________________
240 void AliCorrection::Add(AliCorrection* aCorrectionToAdd, Float_t c)
241 {
242   //
243   // add to measured and generated the measured and generated of aCorrectionToAdd
244   // with the weight c
245
246   fEventCorr->Add(aCorrectionToAdd->GetEventCorrection(),c);
247   fTrackCorr->Add(aCorrectionToAdd->GetTrackCorrection(),c);
248 }
249
250
251 //____________________________________________________________________
252 Bool_t AliCorrection::LoadHistograms(const Char_t* dir)
253 {
254   //
255   // loads the histograms from a file
256   // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
257   //
258
259   if (!fEventCorr || !fTrackCorr)
260     return kFALSE;
261
262   if (!dir)
263     dir = GetName();
264
265   if (!gDirectory->cd(dir))
266     return kFALSE;
267
268   Bool_t success = fEventCorr->LoadHistograms();
269   success &= fTrackCorr->LoadHistograms();
270
271   gDirectory->cd("..");
272
273   return success;
274 }
275
276 //____________________________________________________________________
277 void AliCorrection::SaveHistograms()
278 {
279   //
280   // saves the histograms in a directory with the name of this object (GetName)
281   //
282   
283   gDirectory->mkdir(GetName());
284   gDirectory->cd(GetName());
285
286   if (fEventCorr)
287     fEventCorr->SaveHistograms();
288
289   if (fTrackCorr)
290     fTrackCorr->SaveHistograms();
291     
292   gDirectory->cd("..");
293 }
294
295 //____________________________________________________________________
296 void AliCorrection::ReduceInformation()
297 {
298   // this function deletes the measured and generated histograms to reduce the amount of data
299   // in memory
300
301   if (!fEventCorr || !fTrackCorr)
302     return;
303
304   fEventCorr->ReduceInformation();
305   fTrackCorr->ReduceInformation();
306 }
307
308 //____________________________________________________________________
309 void AliCorrection::Reset(Option_t* option)
310 {
311   // resets the histograms
312
313   if (fEventCorr)
314     fEventCorr->Reset(option);
315
316   if (fTrackCorr)
317     fTrackCorr->Reset(option);
318 }
319
320 //____________________________________________________________________
321 void AliCorrection::DrawHistograms(const Char_t* name)
322 {
323   // draws the corrections
324
325   if (!name)
326     name = GetName();
327
328   if (fEventCorr)
329     fEventCorr->DrawHistograms(Form("%s event", name));
330
331   if (fTrackCorr)
332     fTrackCorr->DrawHistograms(Form("%s track", name));
333 }
334
335 void AliCorrection::DrawOverview(const char* canvasName)
336 {
337   // draw projection of the corrections
338   //   to the 3 axis of fTrackCorr and 2 axis of fEventCorr
339
340   TString canvasNameTmp(GetName());
341   if (canvasName)
342     canvasNameTmp = canvasName;
343
344   TCanvas* canvas = new TCanvas(canvasNameTmp, canvasNameTmp, 1200, 1200);
345   canvas->Divide(3, 3);
346
347   if (fTrackCorr) {
348     canvas->cd(1);
349     fTrackCorr->Get2DCorrectionHistogram("xy", 0, 0)->DrawCopy("COLZ")->GetZaxis()->SetRangeUser(0, 10);
350     
351     canvas->cd(2);
352     fTrackCorr->Get2DCorrectionHistogram("yz", 0, 0)->DrawCopy("COLZ")->GetZaxis()->SetRangeUser(0, 10);
353     
354     canvas->cd(3);
355     fTrackCorr->Get2DCorrectionHistogram("zx", 0, 0)->DrawCopy("COLZ")->GetZaxis()->SetRangeUser(0, 10);
356     
357     canvas->cd(4);
358     fTrackCorr->Get1DCorrectionHistogram("x", 0.3, 5, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
359
360     canvas->cd(5);
361     fTrackCorr->Get1DCorrectionHistogram("y", 0.3, 5, 0, 0)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
362
363     canvas->cd(6);
364     fTrackCorr->Get1DCorrectionHistogram("z", 0, -1, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
365   }
366
367   if (fEventCorr)
368   {
369     canvas->cd(7);
370     fEventCorr->GetCorrectionHistogram()->DrawCopy("COLZ")->GetYaxis()->SetRangeUser(0, 30);
371     
372     canvas->cd(8);
373     fEventCorr->Get1DCorrectionHistogram("x")->DrawCopy();
374
375     canvas->cd(9);
376     fEventCorr->Get1DCorrectionHistogram("y")->DrawCopy()->GetXaxis()->SetRangeUser(0, 30);
377   }
378 }
379
380 //____________________________________________________________________
381 void AliCorrection::SetCorrectionToUnity()
382 {
383   // set the corrections to unity
384
385   if (fEventCorr)
386     fEventCorr->SetCorrectionToUnity();
387
388   if (fTrackCorr)
389     fTrackCorr->SetCorrectionToUnity();
390 }
391
392 //____________________________________________________________________
393 void AliCorrection::Multiply()
394 {
395   // call Multiply
396
397   if (fEventCorr)
398   {
399     fEventCorr->Multiply();
400     // now we manually copy the overflow bin of the y axis (multiplicity) over. This is important to get the event count correct
401     TH2* hist = fEventCorr->GetMeasuredHistogram();
402     for (Int_t x = 1; x <= hist->GetNbinsX(); ++x)
403       fEventCorr->GetGeneratedHistogram()->SetBinContent(x, hist->GetNbinsY() + 1, hist->GetBinContent(x, hist->GetNbinsY() + 1));
404   }
405
406   if (fTrackCorr)
407     fTrackCorr->Multiply();
408 }
409
410 //____________________________________________________________________
411 void AliCorrection::Scale(Double_t factor)
412 {
413   // scales the two contained corrections
414
415   fEventCorr->Scale(factor);
416   fTrackCorr->Scale(factor);
417 }
418
419 //____________________________________________________________________
420 void AliCorrection::PrintStats(Float_t zRange, Float_t etaRange, Float_t ptCut)
421 {
422   // prints statistics and effective correction factors
423
424   Printf("AliCorrection::PrintInfo: Values in |eta| < %.2f, |vtx-z| < %.2f and pt > %.2f:", etaRange, zRange, ptCut);
425
426   // prevent to be on bin border
427   zRange -= 0.1;
428   etaRange -= 0.1;
429
430   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
431   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
432
433   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
434   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
435
436   Float_t tracksM = measured->Integral(measured->GetXaxis()->FindBin(-zRange), measured->GetXaxis()->FindBin(zRange), measured->GetYaxis()->FindBin(-etaRange), measured->GetYaxis()->FindBin(etaRange), measured->GetZaxis()->FindBin(ptCut), measured->GetZaxis()->GetNbins());
437   Float_t tracksG = generated->Integral(generated->GetXaxis()->FindBin(-zRange), generated->GetXaxis()->FindBin(zRange), generated->GetYaxis()->FindBin(-etaRange), generated->GetYaxis()->FindBin(etaRange), generated->GetZaxis()->FindBin(ptCut), generated->GetZaxis()->GetNbins());
438
439   Float_t eventsM = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-zRange), measuredEvents->GetXaxis()->FindBin(zRange), 1, measuredEvents->GetNbinsY());
440   Float_t eventsG = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-zRange), generatedEvents->GetXaxis()->FindBin(zRange), 1, generatedEvents->GetNbinsY());
441
442   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", tracksM, tracksG, eventsM, eventsG);
443
444   if (tracksM > 0)
445     Printf("Effective average correction factor for TRACKS: %.3f", tracksG / tracksM);
446   if (eventsM > 0)
447     Printf("Effective average correction factor for EVENTS: %.3f", eventsG / eventsM);
448
449   if (eventsM > 0 && eventsG > 0)
450   {
451     // normalize to number of events;
452     tracksM /= eventsM;
453     tracksG /= eventsG;
454
455     Printf("%.2f tracks/event measured, %.2f tracks/event after correction --> effective average correction factor is %.3f (pt cut %.2f GeV/c)", tracksM, tracksG, (tracksM > 0) ? (tracksG / tracksM) : -1, ptCut);
456   }
457 }
458
459 //____________________________________________________________________
460 void AliCorrection::PrintInfo(Float_t ptCut)
461 {
462   // prints some stats
463
464   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
465   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
466
467   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
468   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
469
470   Printf("AliCorrection::PrintInfo: Whole phasespace:");
471
472   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", measured->Integral(), generated->Integral(), measuredEvents->Integral(), generatedEvents->Integral());
473
474   Printf("Example centered bin: tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", measured->GetBinContent(measured->GetNbinsX() / 2, measured->GetNbinsY() / 2, measured->GetNbinsZ() / 2), generated->GetBinContent(measured->GetNbinsX() / 2, measured->GetNbinsY() / 2, measured->GetNbinsZ() / 2), measuredEvents->GetBinContent(measuredEvents->GetNbinsX() / 2, measuredEvents->GetNbinsY() / 2), generatedEvents->GetBinContent(measuredEvents->GetNbinsX() / 2, measuredEvents->GetNbinsY() / 2));
475
476   PrintStats(10, 0.6, ptCut);
477   PrintStats(10, 0.8, ptCut);
478   PrintStats(10, 1.5, ptCut);
479 }
480
481 //____________________________________________________________________
482 void AliCorrection::ResetErrorsOnCorrections()
483 {
484   // resets the errors in the correction matrix
485   
486   fEventCorr->ResetErrorsOnCorrections();
487   fTrackCorr->ResetErrorsOnCorrections();  
488 }