added correction for events with vertex but 0 tracks
[u/mrichter/AliRoot.git] / PWG0 / AliCorrection.cxx
CommitLineData
29771dc8 1/* $Id$ */
2
3// ------------------------------------------------------
4//
5// Class to handle corrections.
6//
7// ------------------------------------------------------
8//
9
10#include <TFile.h>
11#include <TCanvas.h>
06e4b91b 12#include <TH3F.h>
29771dc8 13#include <TH2F.h>
14
15#include <AliLog.h>
16#include "AliCorrectionMatrix2D.h"
17#include "AliCorrectionMatrix3D.h"
18
19#include "AliCorrection.h"
20
21//____________________________________________________________________
22ClassImp(AliCorrection)
23
24//____________________________________________________________________
25AliCorrection::AliCorrection() : TNamed(),
26 fEventCorr(0),
27 fTrackCorr(0)
28{
29 // default constructor
30}
31
32//____________________________________________________________________
770a1f1d 33AliCorrection::AliCorrection(const Char_t* name, const Char_t* title, AliPWG0Helper::AnalysisMode analysisMode) : TNamed(name, title),
29771dc8 34 fEventCorr(0),
35 fTrackCorr(0)
36{
37 // constructor initializing tnamed
38
116083b1 39 Float_t* binLimitsPt = 0;
40 Int_t nBinsPt = 0;
41
42 // different binnings, better solution could be anticipated...
770a1f1d 43 if (analysisMode == AliPWG0Helper::kTPC || analysisMode == AliPWG0Helper::kTPCITS)
116083b1 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;
770a1f1d 48 }
49 else if (analysisMode == AliPWG0Helper::kSPD)
116083b1 50 {
51 static Float_t binLimitsPtTmp[] = {-0.5, 0.5};
52 binLimitsPt = (Float_t*) binLimitsPtTmp;
53 nBinsPt = 1;
54 }
55
56 if (!binLimitsPt)
57 {
58 Printf("FATAL: Invalid binning");
59 return;
60 }
61
29771dc8 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};
083a636e 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};
447c325d 66 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};
67// 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 };
06e4b91b 68
116083b1 69 TH3F* dummyBinning = new TH3F("dummyBinning","dummyBinning",14, binLimitsVtx, 40, binLimitsEta , nBinsPt, binLimitsPt);
29771dc8 70
82ac9fc4 71 fEventCorr = new AliCorrectionMatrix2D("EventCorrection", Form("%s EventCorrection", fTitle.Data()), 14, binLimitsVtx, 22, binLimitsN);
72 fTrackCorr = new AliCorrectionMatrix3D("TrackCorrection", Form("%s TrackCorrection", fTitle.Data()), dummyBinning);
06e4b91b 73
74 delete dummyBinning;
29771dc8 75
76 fEventCorr->SetAxisTitles("vtx z [cm]", "Ntracks");
77 fTrackCorr->SetAxisTitles("vtx z [cm]", "#eta", "p_{T} [GeV/c]");
78}
79
80//____________________________________________________________________
81AliCorrection::AliCorrection(const AliCorrection& c) : TNamed(c),
82 fEventCorr(0),
83 fTrackCorr(0)
84{
85 // copy constructor
86 ((AliCorrection &)c).Copy(*this);
87}
88
89//____________________________________________________________________
90AliCorrection::~AliCorrection()
91{
92 //
93 // destructor
94 //
95
96 if (fEventCorr)
97 {
98 delete fEventCorr;
99 fEventCorr = 0;
100 }
101
102 if (fTrackCorr)
103 {
104 delete fTrackCorr;
105 fTrackCorr = 0;
106 }
107}
108
109//____________________________________________________________________
110AliCorrection &AliCorrection::operator=(const AliCorrection &c)
111{
112 // assigment operator
113
114 if (this != &c)
115 ((AliCorrection &) c).Copy(*this);
116
117 return *this;
118}
119
120//____________________________________________________________________
121void AliCorrection::Copy(TObject& c) const
122{
123 // copy function
124
125 AliCorrection& target = (AliCorrection &) c;
126
127 if (fEventCorr)
128 target.fEventCorr = dynamic_cast<AliCorrectionMatrix2D*> (fEventCorr->Clone());
129
130 if (fTrackCorr)
131 target.fTrackCorr = dynamic_cast<AliCorrectionMatrix3D*> (fTrackCorr->Clone());
132}
133
134//____________________________________________________________________
135Long64_t AliCorrection::Merge(TCollection* list)
136{
137 // Merge a list of AliCorrection objects with this (needed for
138 // PROOF).
139 // Returns the number of merged objects (including this).
140
141 if (!list)
142 return 0;
143
144 if (list->IsEmpty())
145 return 1;
146
147 TIterator* iter = list->MakeIterator();
148 TObject* obj;
149
150 // collections of measured and generated histograms
151 TList* collectionEvent = new TList;
152 TList* collectionTrack = new TList;
153
154 Int_t count = 0;
155 while ((obj = iter->Next())) {
156
157 AliCorrection* entry = dynamic_cast<AliCorrection*> (obj);
158 if (entry == 0)
159 continue;
160
161 collectionEvent->Add(entry->fEventCorr);
162 collectionTrack->Add(entry->fTrackCorr);
163
164 count++;
165 }
166 fEventCorr->Merge(collectionEvent);
167 fTrackCorr->Merge(collectionTrack);
168
169 delete collectionEvent;
170 delete collectionTrack;
171
172 return count+1;
173}
174
175//____________________________________________________________________
176void AliCorrection::Divide()
177{
178 //
179 // divide the histograms to get the correction
180 //
181
182 if (!fEventCorr || !fTrackCorr)
183 return;
184
185 fEventCorr->Divide();
186 fTrackCorr->Divide();
187
dd367a14 188 Int_t emptyBins = fTrackCorr->CheckEmptyBins(-9.99, 9.99, -0.79, 0.79, 0.3, 4.9);
29771dc8 189 printf("INFO: In the central region the track correction of %s has %d empty bins\n", GetName(), emptyBins);
190}
191
192//____________________________________________________________________
2e88424e 193void AliCorrection::Add(AliCorrection* aCorrectionToAdd, Float_t c)
194{
195 //
196 // add to measured and generated the measured and generated of aCorrectionToAdd
197 // with the weight c
198
199 fEventCorr->Add(aCorrectionToAdd->GetEventCorrection(),c);
200 fTrackCorr->Add(aCorrectionToAdd->GetTrackCorrection(),c);
201}
202
203
204//____________________________________________________________________
29771dc8 205Bool_t AliCorrection::LoadHistograms(const Char_t* dir)
206{
207 //
208 // loads the histograms from a file
209 // if dir is empty a directory with the name of this object is taken (like in SaveHistogram)
210 //
211
212 if (!fEventCorr || !fTrackCorr)
213 return kFALSE;
214
215 if (!dir)
216 dir = GetName();
217
218 if (!gDirectory->cd(dir))
219 return kFALSE;
220
221 Bool_t success = fEventCorr->LoadHistograms();
222 success &= fTrackCorr->LoadHistograms();
223
224 gDirectory->cd("..");
225
226 return success;
227}
228
229//____________________________________________________________________
230void AliCorrection::SaveHistograms()
231{
232 //
233 // saves the histograms in a directory with the name of this object (GetName)
234 //
235
236 gDirectory->mkdir(GetName());
237 gDirectory->cd(GetName());
238
239 if (fEventCorr)
240 fEventCorr->SaveHistograms();
241
242 if (fTrackCorr)
243 fTrackCorr->SaveHistograms();
244
245 gDirectory->cd("..");
246}
247
248//____________________________________________________________________
249void AliCorrection::ReduceInformation()
250{
251 // this function deletes the measured and generated histograms to reduce the amount of data
252 // in memory
253
254 if (!fEventCorr || !fTrackCorr)
255 return;
256
257 fEventCorr->ReduceInformation();
258 fTrackCorr->ReduceInformation();
259}
260
261//____________________________________________________________________
262void AliCorrection::Reset(Option_t* option)
263{
264 // resets the histograms
265
266 if (fEventCorr)
267 fEventCorr->Reset(option);
268
269 if (fTrackCorr)
270 fTrackCorr->Reset(option);
271}
272
273//____________________________________________________________________
274void AliCorrection::DrawHistograms(const Char_t* name)
275{
276 // draws the corrections
277
278 if (!name)
279 name = GetName();
280
281 if (fEventCorr)
282 fEventCorr->DrawHistograms(Form("%s event", name));
283
284 if (fTrackCorr)
285 fTrackCorr->DrawHistograms(Form("%s track", name));
286}
287
dd367a14 288void AliCorrection::DrawOverview(const char* canvasName)
289{
290 // draw projection of the corrections
291 // to the 3 axis of fTrackCorr and 2 axis of fEventCorr
292
293 TString canvasNameTmp(GetName());
294 if (canvasName)
295 canvasNameTmp = canvasName;
296
297 TCanvas* canvas = new TCanvas(canvasNameTmp, canvasNameTmp, 1200, 800);
298 canvas->Divide(3, 2);
299
300 if (fTrackCorr) {
301 canvas->cd(1);
302 fTrackCorr->Get1DCorrectionHistogram("x", 0.3, 5, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
303
304 canvas->cd(2);
305 fTrackCorr->Get1DCorrectionHistogram("y", 0.3, 5, 0, 0)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
306
307 canvas->cd(3);
308 fTrackCorr->Get1DCorrectionHistogram("z", 0, -1, -1, 1)->DrawCopy()->GetYaxis()->SetRangeUser(0, 10);
309 }
310
311 if (fEventCorr)
312 {
313 canvas->cd(4);
314 fEventCorr->Get1DCorrectionHistogram("x")->DrawCopy();
315
316 canvas->cd(5);
317 fEventCorr->Get1DCorrectionHistogram("y")->DrawCopy()->GetXaxis()->SetRangeUser(0, 30);
318 }
319}
320
29771dc8 321//____________________________________________________________________
322void AliCorrection::SetCorrectionToUnity()
323{
324 // set the corrections to unity
325
326 if (fEventCorr)
327 fEventCorr->SetCorrectionToUnity();
328
329 if (fTrackCorr)
330 fTrackCorr->SetCorrectionToUnity();
331}
332
333//____________________________________________________________________
334void AliCorrection::Multiply()
335{
336 // call Multiply
337
338 if (fEventCorr)
339 {
340 fEventCorr->Multiply();
341 // now we manually copy the overflow bin of the y axis (multiplicity) over. This is important to get the event count correct
342 TH2F* hist = fEventCorr->GetMeasuredHistogram();
343 for (Int_t x = 1; x <= hist->GetNbinsX(); ++x)
344 fEventCorr->GetGeneratedHistogram()->SetBinContent(x, hist->GetNbinsY() + 1, hist->GetBinContent(x, hist->GetNbinsY() + 1));
345 }
346
347 if (fTrackCorr)
348 fTrackCorr->Multiply();
349}
dd367a14 350
351//____________________________________________________________________
352void AliCorrection::Scale(Double_t factor)
353{
354 // scales the two contained corrections
355
356 fEventCorr->Scale(factor);
357 fTrackCorr->Scale(factor);
358}
359
360//____________________________________________________________________
361void AliCorrection::PrintInfo(Float_t ptCut)
362{
363 // prints some stats
364
365 TH3* measured = GetTrackCorrection()->GetMeasuredHistogram();
366 TH3* generated = GetTrackCorrection()->GetGeneratedHistogram();
367
368 TH2* measuredEvents = GetEventCorrection()->GetMeasuredHistogram();
369 TH2* generatedEvents = GetEventCorrection()->GetGeneratedHistogram();
370
3dfa46a4 371 Printf("AliCorrection::PrintInfo: Whole phasespace:");
372
dd367a14 373 Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %1.f, events generated %1.f", measured->Integral(), generated->Integral(), measuredEvents->Integral(), generatedEvents->Integral());
374
3dfa46a4 375 Printf("AliCorrection::PrintInfo: Values in |eta| < 0.8, |vtx-z| < 10 and pt > %.2f:", ptCut);
376
377 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());
378 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());
379
380 Float_t eventsM = measuredEvents->Integral(measuredEvents->GetXaxis()->FindBin(-9.9), measuredEvents->GetXaxis()->FindBin(9.9), 1, measuredEvents->GetNbinsY());
381 Float_t eventsG = generatedEvents->Integral(generatedEvents->GetXaxis()->FindBin(-9.9), generatedEvents->GetXaxis()->FindBin(9.9), 1, generatedEvents->GetNbinsY());
382
383 Printf("tracks measured: %.1f tracks generated: %.1f, events measured: %1.f, events generated %1.f", tracksM, tracksG, eventsM, eventsG);
dd367a14 384
3dfa46a4 385 if (tracksM > 0)
386 Printf("Effective average correction factor for TRACKS: %.3f", tracksG / tracksM);
387 if (eventsM > 0)
388 Printf("Effective average correction factor for EVENTS: %.3f", eventsG / eventsM);
dd367a14 389
3dfa46a4 390 if (eventsM > 0 && eventsG > 0)
391 {
392 // normalize to number of events;
393 tracksM /= eventsM;
394 tracksG /= eventsG;
395
396 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);
397 }
dd367a14 398}