removing checking of vertex resolution in getvertex
[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
15 #include <AliLog.h>
16 #include "AliCorrectionMatrix2D.h"
17 #include "AliCorrectionMatrix3D.h"
18
19 #include "AliCorrection.h"
20
21 //____________________________________________________________________
22 ClassImp(AliCorrection)
23
24 //____________________________________________________________________
25 AliCorrection::AliCorrection() : TNamed(),
26   fEventCorr(0),
27   fTrackCorr(0)
28 {
29   // default constructor
30 }
31
32 //____________________________________________________________________
33 AliCorrection::AliCorrection(const Char_t* name, const Char_t* title, AliPWG0Helper::AnalysisMode analysisMode) : TNamed(name, title),
34   fEventCorr(0),
35   fTrackCorr(0)
36 {
37   // constructor initializing tnamed
38
39   Float_t* binLimitsPt = 0;
40   Int_t nBinsPt = 0;
41
42   // different binnings, better solution could be anticipated...
43   if (analysisMode == AliPWG0Helper::kTPC || analysisMode == AliPWG0Helper::kTPCITS)
44   {
45     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};
46     binLimitsPt = (Float_t*) binLimitsPtTmp;
47     nBinsPt = 28;
48   }
49   else if (analysisMode == AliPWG0Helper::kSPD)
50   {
51     static Float_t binLimitsPtTmp[] = {-0.5, 100.0};
52     binLimitsPt = (Float_t*) binLimitsPtTmp;
53     nBinsPt = 1;
54   }
55
56   if (!binLimitsPt)
57   {
58     Printf("FATAL: Invalid binning");
59     return;
60   }
61
62   Int_t nBinsN2 = 1;
63   Float_t binLimitsN2[]   = {-0.5, 1000};
64   //Int_t nBinsN2 = 21;
65   //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};
66   Int_t nBinsN = 22;
67   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};
68   //Int_t nBinsN = 52;
69   //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};
70
71   //Float_t binLimitsVtx[] = {-20,-15,-10,-6,-3,0,3,6,10,15,20};
72   //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};
73   Float_t binLimitsVtx[] = {-30,-25,-20,-15,-10,-8,-6,-4,-2,0,2,4,6,8,10,15,20,25,30};
74   Float_t binLimitsEta[] = {-3.0,-2.8,-2.6,-2.4,-2.2,
75                             -2.0,-1.8,-1.6,-1.4,-1.2,
76                             -1.0,-0.8,-0.6,-0.4,-0.2, 0.0,
77                              0.2, 0.4, 0.6, 0.8, 1.0,
78                              1.2, 1.4, 1.6, 1.8, 2.0,
79                              2.2, 2.4, 2.6, 2.8, 3.0};
80 //  Float_t binLimitsEta[] = {-2,-1.8,-1.6,-1.4,-1.2,-1.0,-0.8,-0.6,-0.4,-0.2,0.0,0.2,0.4,0.6,0.8,1.0,1.2,1.4,1.6,1.8,2.0};
81 //  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};
82 //  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 };
83
84   fEventCorr = new AliCorrectionMatrix2D("EventCorrection", Form("%s EventCorrection", fTitle.Data()), 18, binLimitsVtx, nBinsN, binLimitsN);
85
86   if (analysisMode == AliPWG0Helper::kSPD)
87   {
88     TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",18, binLimitsVtx, 30, binLimitsEta, nBinsN2, binLimitsN2);
89     fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
90     fTrackCorr->SetAxisTitles("vtx z [cm]", "#eta", "Ntracks");
91     delete dummyBinning;
92   }
93   else
94   {
95     TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",18, binLimitsVtx, 30, binLimitsEta , nBinsPt, binLimitsPt);
96     fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
97     fTrackCorr->SetAxisTitles("vtx z [cm]", "#eta", "p_{T} [GeV/c]");
98     delete dummyBinning;
99   }
100
101
102   fEventCorr->SetAxisTitles("vtx z [cm]", "Ntracks");
103 }
104
105 //____________________________________________________________________
106 AliCorrection::AliCorrection(const AliCorrection& c) : TNamed(c),
107   fEventCorr(0),
108   fTrackCorr(0)
109 {
110   // copy constructor
111   ((AliCorrection &)c).Copy(*this);
112 }
113
114 //____________________________________________________________________
115 AliCorrection::~AliCorrection()
116 {
117   //
118   // destructor
119   //
120
121   if (fEventCorr)
122   {
123     delete fEventCorr;
124     fEventCorr = 0;
125   }
126
127   if (fTrackCorr)
128   {
129     delete fTrackCorr;
130     fTrackCorr = 0;
131   }
132 }
133
134 //____________________________________________________________________
135 AliCorrection &AliCorrection::operator=(const AliCorrection &c)
136 {
137   // assigment operator
138
139   if (this != &c)
140     ((AliCorrection &) c).Copy(*this);
141
142   return *this;
143 }
144
145 //____________________________________________________________________
146 void AliCorrection::Copy(TObject& c) const
147 {
148   // copy function
149
150   AliCorrection& target = (AliCorrection &) c;
151
152   if (fEventCorr)
153     target.fEventCorr = dynamic_cast<AliCorrectionMatrix2D*> (fEventCorr->Clone());
154
155   if (fTrackCorr)
156     target.fTrackCorr = dynamic_cast<AliCorrectionMatrix3D*> (fTrackCorr->Clone());
157 }
158
159 //____________________________________________________________________
160 Long64_t AliCorrection::Merge(TCollection* list)
161 {
162   // Merge a list of AliCorrection objects with this (needed for
163   // PROOF). 
164   // Returns the number of merged objects (including this).
165
166   if (!list)
167     return 0;
168   
169   if (list->IsEmpty())
170     return 1;
171
172   TIterator* iter = list->MakeIterator();
173   TObject* obj;
174
175   // collections of measured and generated histograms
176   TList* collectionEvent = new TList;
177   TList* collectionTrack = new TList;
178   
179   Int_t count = 0;
180   while ((obj = iter->Next())) {
181     
182     AliCorrection* entry = dynamic_cast<AliCorrection*> (obj);
183     if (entry == 0) 
184       continue;
185
186     collectionEvent->Add(entry->fEventCorr);
187     collectionTrack->Add(entry->fTrackCorr);
188
189     count++;
190   }
191   fEventCorr->Merge(collectionEvent);
192   fTrackCorr->Merge(collectionTrack);
193
194   delete collectionEvent;
195   delete collectionTrack;
196
197   return count+1;
198 }
199
200 //____________________________________________________________________
201 void AliCorrection::Divide()
202 {
203   //
204   // divide the histograms to get the correction
205   //
206   
207   if (!fEventCorr || !fTrackCorr)
208     return;
209     
210   fEventCorr->Divide();
211   fTrackCorr->Divide();
212
213   Int_t emptyBins = fTrackCorr->CheckEmptyBins(-9.99, 9.99, -0.79, 0.79, 0.3, 4.9);
214   printf("INFO: In the central region the track correction of %s has %d empty bins\n", GetName(), emptyBins);
215 }
216
217 //____________________________________________________________________
218 void AliCorrection::Add(AliCorrection* aCorrectionToAdd, Float_t c)
219 {
220   //
221   // add to measured and generated the measured and generated of aCorrectionToAdd
222   // with the weight c
223
224   fEventCorr->Add(aCorrectionToAdd->GetEventCorrection(),c);
225   fTrackCorr->Add(aCorrectionToAdd->GetTrackCorrection(),c);
226 }
227
228
229 //____________________________________________________________________
230 Bool_t AliCorrection::LoadHistograms(const Char_t* dir)
231 {
232   //
233   // loads the histograms from a file
234   // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
235   //
236
237   if (!fEventCorr || !fTrackCorr)
238     return kFALSE;
239
240   if (!dir)
241     dir = GetName();
242
243   if (!gDirectory->cd(dir))
244     return kFALSE;
245
246   Bool_t success = fEventCorr->LoadHistograms();
247   success &= fTrackCorr->LoadHistograms();
248
249   gDirectory->cd("..");
250
251   return success;
252 }
253
254 //____________________________________________________________________
255 void AliCorrection::SaveHistograms()
256 {
257   //
258   // saves the histograms in a directory with the name of this object (GetName)
259   //
260   
261   gDirectory->mkdir(GetName());
262   gDirectory->cd(GetName());
263
264   if (fEventCorr)
265     fEventCorr->SaveHistograms();
266
267   if (fTrackCorr)
268     fTrackCorr->SaveHistograms();
269     
270   gDirectory->cd("..");
271 }
272
273 //____________________________________________________________________
274 void AliCorrection::ReduceInformation()
275 {
276   // this function deletes the measured and generated histograms to reduce the amount of data
277   // in memory
278
279   if (!fEventCorr || !fTrackCorr)
280     return;
281
282   fEventCorr->ReduceInformation();
283   fTrackCorr->ReduceInformation();
284 }
285
286 //____________________________________________________________________
287 void AliCorrection::Reset(Option_t* option)
288 {
289   // resets the histograms
290
291   if (fEventCorr)
292     fEventCorr->Reset(option);
293
294   if (fTrackCorr)
295     fTrackCorr->Reset(option);
296 }
297
298 //____________________________________________________________________
299 void AliCorrection::DrawHistograms(const Char_t* name)
300 {
301   // draws the corrections
302
303   if (!name)
304     name = GetName();
305
306   if (fEventCorr)
307     fEventCorr->DrawHistograms(Form("%s event", name));
308
309   if (fTrackCorr)
310     fTrackCorr->DrawHistograms(Form("%s track", name));
311 }
312
313 void AliCorrection::DrawOverview(const char* canvasName)
314 {
315   // draw projection of the corrections
316   //   to the 3 axis of fTrackCorr and 2 axis of fEventCorr
317
318   TString canvasNameTmp(GetName());
319   if (canvasName)
320     canvasNameTmp = canvasName;
321
322   TCanvas* canvas = new TCanvas(canvasNameTmp, canvasNameTmp, 1200, 800);
323   canvas->Divide(3, 2);
324
325   if (fTrackCorr) {
326     canvas->cd(1);
327     fTrackCorr->Get1DCorrectionHistogram("x", 0.3, 5, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
328
329     canvas->cd(2);
330     fTrackCorr->Get1DCorrectionHistogram("y", 0.3, 5, 0, 0)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
331
332     canvas->cd(3);
333     fTrackCorr->Get1DCorrectionHistogram("z", 0, -1, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
334   }
335
336   if (fEventCorr)
337   {
338     canvas->cd(4);
339     fEventCorr->Get1DCorrectionHistogram("x")->DrawCopy();
340
341     canvas->cd(5);
342     fEventCorr->Get1DCorrectionHistogram("y")->DrawCopy()->GetXaxis()->SetRangeUser(0, 30);
343   }
344 }
345
346 //____________________________________________________________________
347 void AliCorrection::SetCorrectionToUnity()
348 {
349   // set the corrections to unity
350
351   if (fEventCorr)
352     fEventCorr->SetCorrectionToUnity();
353
354   if (fTrackCorr)
355     fTrackCorr->SetCorrectionToUnity();
356 }
357
358 //____________________________________________________________________
359 void AliCorrection::Multiply()
360 {
361   // call Multiply
362
363   if (fEventCorr)
364   {
365     fEventCorr->Multiply();
366     // now we manually copy the overflow bin of the y axis (multiplicity) over. This is important to get the event count correct
367     TH2* hist = fEventCorr->GetMeasuredHistogram();
368     for (Int_t x = 1; x <= hist->GetNbinsX(); ++x)
369       fEventCorr->GetGeneratedHistogram()->SetBinContent(x, hist->GetNbinsY() + 1, hist->GetBinContent(x, hist->GetNbinsY() + 1));
370   }
371
372   if (fTrackCorr)
373     fTrackCorr->Multiply();
374 }
375
376 //____________________________________________________________________
377 void AliCorrection::Scale(Double_t factor)
378 {
379   // scales the two contained corrections
380
381   fEventCorr->Scale(factor);
382   fTrackCorr->Scale(factor);
383 }
384
385 //____________________________________________________________________
386 void AliCorrection::PrintStats(Float_t zRange, Float_t etaRange, Float_t ptCut)
387 {
388   // prints statistics and effective correction factors
389
390   Printf("AliCorrection::PrintInfo: Values in |eta| < %.2f, |vtx-z| < %.2f and pt > %.2f:", etaRange, zRange, ptCut);
391
392   // prevent to be on bin border
393   zRange -= 0.1;
394   etaRange -= 0.1;
395
396   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
397   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
398
399   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
400   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
401
402   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());
403   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());
404
405   Float_t eventsM = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-zRange), measuredEvents->GetXaxis()->FindBin(zRange), 1, measuredEvents->GetNbinsY());
406   Float_t eventsG = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-zRange), generatedEvents->GetXaxis()->FindBin(zRange), 1, generatedEvents->GetNbinsY());
407
408   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", tracksM, tracksG, eventsM, eventsG);
409
410   if (tracksM > 0)
411     Printf("Effective average correction factor for TRACKS: %.3f", tracksG / tracksM);
412   if (eventsM > 0)
413     Printf("Effective average correction factor for EVENTS: %.3f", eventsG / eventsM);
414
415   if (eventsM > 0 && eventsG > 0)
416   {
417     // normalize to number of events;
418     tracksM /= eventsM;
419     tracksG /= eventsG;
420
421     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);
422   }
423 }
424
425 //____________________________________________________________________
426 void AliCorrection::PrintInfo(Float_t ptCut)
427 {
428   // prints some stats
429
430   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
431   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
432
433   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
434   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
435
436   Printf("AliCorrection::PrintInfo: Whole phasespace:");
437
438   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", measured->Integral(), generated->Integral(), measuredEvents->Integral(), generatedEvents->Integral());
439
440   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));
441
442   PrintStats(10, 1.0, ptCut);
443   PrintStats(10, 1.5, ptCut);
444 }