fixing warnings
[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   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};
63   //Float_t binLimitsVtx[] = {-20,-15,-10,-6,-3,0,3,6,10,15,20};
64   //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};
65   Float_t binLimitsVtx[] = {-20,-15,-10,-8,-6,-4,-2,0,2,4,6,8,10,15,20};
66   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};
67 //  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};
68 //  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 };
69
70   TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",14, binLimitsVtx, 20, binLimitsEta , nBinsPt, binLimitsPt);
71
72   fEventCorr = new AliCorrectionMatrix2D("EventCorrection", Form("%s EventCorrection", fTitle.Data()), 14, binLimitsVtx, 22, binLimitsN);
73   fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
74
75   delete dummyBinning;
76
77   fEventCorr->SetAxisTitles("vtx z [cm]", "Ntracks");
78   fTrackCorr->SetAxisTitles("vtx z [cm]", "#eta", "p_{T} [GeV/c]");
79 }
80
81 //____________________________________________________________________
82 AliCorrection::AliCorrection(const AliCorrection& c) : TNamed(c),
83   fEventCorr(0),
84   fTrackCorr(0)
85 {
86   // copy constructor
87   ((AliCorrection &)c).Copy(*this);
88 }
89
90 //____________________________________________________________________
91 AliCorrection::~AliCorrection()
92 {
93   //
94   // destructor
95   //
96
97   if (fEventCorr)
98   {
99     delete fEventCorr;
100     fEventCorr = 0;
101   }
102
103   if (fTrackCorr)
104   {
105     delete fTrackCorr;
106     fTrackCorr = 0;
107   }
108 }
109
110 //____________________________________________________________________
111 AliCorrection &AliCorrection::operator=(const AliCorrection &c)
112 {
113   // assigment operator
114
115   if (this != &c)
116     ((AliCorrection &) c).Copy(*this);
117
118   return *this;
119 }
120
121 //____________________________________________________________________
122 void AliCorrection::Copy(TObject& c) const
123 {
124   // copy function
125
126   AliCorrection& target = (AliCorrection &) c;
127
128   if (fEventCorr)
129     target.fEventCorr = dynamic_cast<AliCorrectionMatrix2D*> (fEventCorr->Clone());
130
131   if (fTrackCorr)
132     target.fTrackCorr = dynamic_cast<AliCorrectionMatrix3D*> (fTrackCorr->Clone());
133 }
134
135 //____________________________________________________________________
136 Long64_t AliCorrection::Merge(TCollection* list)
137 {
138   // Merge a list of AliCorrection objects with this (needed for
139   // PROOF). 
140   // Returns the number of merged objects (including this).
141
142   if (!list)
143     return 0;
144   
145   if (list->IsEmpty())
146     return 1;
147
148   TIterator* iter = list->MakeIterator();
149   TObject* obj;
150
151   // collections of measured and generated histograms
152   TList* collectionEvent = new TList;
153   TList* collectionTrack = new TList;
154   
155   Int_t count = 0;
156   while ((obj = iter->Next())) {
157     
158     AliCorrection* entry = dynamic_cast<AliCorrection*> (obj);
159     if (entry == 0) 
160       continue;
161
162     collectionEvent->Add(entry->fEventCorr);
163     collectionTrack->Add(entry->fTrackCorr);
164
165     count++;
166   }
167   fEventCorr->Merge(collectionEvent);
168   fTrackCorr->Merge(collectionTrack);
169
170   delete collectionEvent;
171   delete collectionTrack;
172
173   return count+1;
174 }
175
176 //____________________________________________________________________
177 void AliCorrection::Divide()
178 {
179   //
180   // divide the histograms to get the correction
181   //
182   
183   if (!fEventCorr || !fTrackCorr)
184     return;
185     
186   fEventCorr->Divide();
187   fTrackCorr->Divide();
188
189   Int_t emptyBins = fTrackCorr->CheckEmptyBins(-9.99, 9.99, -0.79, 0.79, 0.3, 4.9);
190   printf("INFO: In the central region the track correction of %s has %d empty bins\n", GetName(), emptyBins);
191 }
192
193 //____________________________________________________________________
194 void AliCorrection::Add(AliCorrection* aCorrectionToAdd, Float_t c)
195 {
196   //
197   // add to measured and generated the measured and generated of aCorrectionToAdd
198   // with the weight c
199
200   fEventCorr->Add(aCorrectionToAdd->GetEventCorrection(),c);
201   fTrackCorr->Add(aCorrectionToAdd->GetTrackCorrection(),c);
202 }
203
204
205 //____________________________________________________________________
206 Bool_t AliCorrection::LoadHistograms(const Char_t* dir)
207 {
208   //
209   // loads the histograms from a file
210   // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
211   //
212
213   if (!fEventCorr || !fTrackCorr)
214     return kFALSE;
215
216   if (!dir)
217     dir = GetName();
218
219   if (!gDirectory->cd(dir))
220     return kFALSE;
221
222   Bool_t success = fEventCorr->LoadHistograms();
223   success &= fTrackCorr->LoadHistograms();
224
225   gDirectory->cd("..");
226
227   return success;
228 }
229
230 //____________________________________________________________________
231 void AliCorrection::SaveHistograms()
232 {
233   //
234   // saves the histograms in a directory with the name of this object (GetName)
235   //
236   
237   gDirectory->mkdir(GetName());
238   gDirectory->cd(GetName());
239
240   if (fEventCorr)
241     fEventCorr->SaveHistograms();
242
243   if (fTrackCorr)
244     fTrackCorr->SaveHistograms();
245     
246   gDirectory->cd("..");
247 }
248
249 //____________________________________________________________________
250 void AliCorrection::ReduceInformation()
251 {
252   // this function deletes the measured and generated histograms to reduce the amount of data
253   // in memory
254
255   if (!fEventCorr || !fTrackCorr)
256     return;
257
258   fEventCorr->ReduceInformation();
259   fTrackCorr->ReduceInformation();
260 }
261
262 //____________________________________________________________________
263 void AliCorrection::Reset(Option_t* option)
264 {
265   // resets the histograms
266
267   if (fEventCorr)
268     fEventCorr->Reset(option);
269
270   if (fTrackCorr)
271     fTrackCorr->Reset(option);
272 }
273
274 //____________________________________________________________________
275 void AliCorrection::DrawHistograms(const Char_t* name)
276 {
277   // draws the corrections
278
279   if (!name)
280     name = GetName();
281
282   if (fEventCorr)
283     fEventCorr->DrawHistograms(Form("%s event", name));
284
285   if (fTrackCorr)
286     fTrackCorr->DrawHistograms(Form("%s track", name));
287 }
288
289 void AliCorrection::DrawOverview(const char* canvasName)
290 {
291   // draw projection of the corrections
292   //   to the 3 axis of fTrackCorr and 2 axis of fEventCorr
293
294   TString canvasNameTmp(GetName());
295   if (canvasName)
296     canvasNameTmp = canvasName;
297
298   TCanvas* canvas = new TCanvas(canvasNameTmp, canvasNameTmp, 1200, 800);
299   canvas->Divide(3, 2);
300
301   if (fTrackCorr) {
302     canvas->cd(1);
303     fTrackCorr->Get1DCorrectionHistogram("x", 0.3, 5, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
304
305     canvas->cd(2);
306     fTrackCorr->Get1DCorrectionHistogram("y", 0.3, 5, 0, 0)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
307
308     canvas->cd(3);
309     fTrackCorr->Get1DCorrectionHistogram("z", 0, -1, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
310   }
311
312   if (fEventCorr)
313   {
314     canvas->cd(4);
315     fEventCorr->Get1DCorrectionHistogram("x")->DrawCopy();
316
317     canvas->cd(5);
318     fEventCorr->Get1DCorrectionHistogram("y")->DrawCopy()->GetXaxis()->SetRangeUser(0, 30);
319   }
320 }
321
322 //____________________________________________________________________
323 void AliCorrection::SetCorrectionToUnity()
324 {
325   // set the corrections to unity
326
327   if (fEventCorr)
328     fEventCorr->SetCorrectionToUnity();
329
330   if (fTrackCorr)
331     fTrackCorr->SetCorrectionToUnity();
332 }
333
334 //____________________________________________________________________
335 void AliCorrection::Multiply()
336 {
337   // call Multiply
338
339   if (fEventCorr)
340   {
341     fEventCorr->Multiply();
342     // now we manually copy the overflow bin of the y axis (multiplicity) over. This is important to get the event count correct
343     TH2F* hist = fEventCorr->GetMeasuredHistogram();
344     for (Int_t x = 1; x <= hist->GetNbinsX(); ++x)
345       fEventCorr->GetGeneratedHistogram()->SetBinContent(x, hist->GetNbinsY() + 1, hist->GetBinContent(x, hist->GetNbinsY() + 1));
346   }
347
348   if (fTrackCorr)
349     fTrackCorr->Multiply();
350 }
351
352 //____________________________________________________________________
353 void AliCorrection::Scale(Double_t factor)
354 {
355   // scales the two contained corrections
356
357   fEventCorr->Scale(factor);
358   fTrackCorr->Scale(factor);
359 }
360
361 //____________________________________________________________________
362 void AliCorrection::PrintInfo(Float_t ptCut)
363 {
364   // prints some stats
365
366   TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
367   TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
368
369   TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
370   TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
371
372   Printf("AliCorrection::PrintInfo: Whole phasespace:");
373
374   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", measured->Integral(), generated->Integral(), measuredEvents->Integral(), generatedEvents->Integral());
375
376   Printf("AliCorrection::PrintInfo: Values in |eta| < 0.8, |vtx-z| < 10 and pt > %.2f:", ptCut);
377
378   Float_t tracksM = measured->Integral(measured->GetXaxis()->FindBin(-9.9), measured->GetXaxis()->FindBin(9.9), measured->GetYaxis()->FindBin(-0.79), measured->GetYaxis()->FindBin(0.79), measured->GetZaxis()->FindBin(ptCut), measured->GetZaxis()->GetNbins());
379   Float_t tracksG = generated->Integral(generated->GetXaxis()->FindBin(-9.9), generated->GetXaxis()->FindBin(9.9), generated->GetYaxis()->FindBin(-0.79), generated->GetYaxis()->FindBin(0.79), generated->GetZaxis()->FindBin(ptCut), generated->GetZaxis()->GetNbins());
380
381   Float_t eventsM = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-9.9), measuredEvents->GetXaxis()->FindBin(9.9), 1, measuredEvents->GetNbinsY());
382   Float_t eventsG = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-9.9), generatedEvents->GetXaxis()->FindBin(9.9), 1, generatedEvents->GetNbinsY());
383
384   Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %.1f, events generated %.1f", tracksM, tracksG, eventsM, eventsG);
385
386   if (tracksM > 0)
387     Printf("Effective average correction factor for TRACKS: %.3f", tracksG / tracksM);
388   if (eventsM > 0)
389   Printf("Effective average correction factor for EVENTS: %.3f", eventsG / eventsM);
390
391   if (eventsM > 0 && eventsG > 0)
392   {
393     // normalize to number of events;
394     tracksM /= eventsM;
395     tracksG /= eventsG;
396
397     Printf("%.2f tracks/event measured, %.2f tracks/event after correction --> effective average correction factor is %.3f (pt cut %.2f GeV/c)", tracksM, tracksG, tracksG / tracksM, ptCut);
398   }
399 }