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70f2ce9d | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-2007, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
13 | * provided "as is" without express or implied warranty. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
b31787ca | 17 | //--------------------------------------------------------------------------------------- |
70f2ce9d | 18 | // Analysis Task that uses the Soft K-Means Algorithm to find clusters in |
19 | // the eta-phi space of Minimum Bias. No pt information is used for the clustering. | |
20 | // | |
21 | // | |
22 | // Author: Andreas Morsch (CERN) | |
23 | // andreas.morsch@cern.ch | |
b31787ca | 24 | //--------------------------------------------------------------------------------------- |
70f2ce9d | 25 | |
26 | ||
27 | ||
28 | #include "TChain.h" | |
b31787ca | 29 | #include "TFile.h" |
70f2ce9d | 30 | #include "TTree.h" |
31 | #include "TH1F.h" | |
32 | #include "TH2F.h" | |
33 | #include "TProfile.h" | |
34 | ||
35 | #include "TList.h" | |
36 | #include "TParticle.h" | |
37 | #include "TParticlePDG.h" | |
38 | #include "TProfile.h" | |
39 | #include "TMath.h" | |
40 | #include "TRandom.h" | |
19c5a36a | 41 | #include "TObjArray.h" |
70f2ce9d | 42 | |
43 | #include "AliAnalysisTask.h" | |
44 | #include "AliAnalysisManager.h" | |
45 | ||
42dc9410 | 46 | #include "AliVEvent.h" |
70f2ce9d | 47 | #include "AliESDEvent.h" |
b31787ca | 48 | #include "AliExternalTrackParam.h" |
70f2ce9d | 49 | #include "AliStack.h" |
50 | #include "AliESDVertex.h" | |
51 | #include "AliESDInputHandler.h" | |
52 | #include "AliESDtrackCuts.h" | |
53 | #include "AliMultiplicity.h" | |
54 | ||
55 | #include "AliMCParticle.h" | |
56 | #include "AliMCEvent.h" | |
57 | #include "AliAnalysisTaskKMeans.h" | |
58 | #include "AliTrackReference.h" | |
59 | #include "AliStack.h" | |
60 | #include "AliHeader.h" | |
61 | #include "AliKMeansClustering.h" | |
62 | ||
63 | ||
64 | ||
65 | ClassImp(AliAnalysisTaskKMeans) | |
66 | ||
67 | AliAnalysisTaskKMeans::AliAnalysisTaskKMeans() | |
320bb308 | 68 | : AliAnalysisTaskSE() |
69 | ,fK(0) | |
42dc9410 | 70 | ,fNMin(0) |
70f2ce9d | 71 | ,fHists(0) |
72 | ,fH1CEta(0) | |
73 | ,fH1CPhi(0) | |
74 | ,fH1CEtaR(0) | |
75 | ,fH2N1N2(0) | |
76 | ,fH1Pt(0) | |
77 | ,fH1PtC(0) | |
78 | ,fH1PtC1(0) | |
79 | ,fH1PtC2(0) | |
42dc9410 | 80 | ,fH1PtAS(0) |
81 | ,fH1PtR(0) | |
a51f90df | 82 | ,fH1SPt(0) |
83 | ,fH1SPtC(0) | |
70f2ce9d | 84 | ,fH1DPhi(0) |
85 | ,fH1DR(0) | |
86 | ,fH1DRR(0) | |
87 | ,fH2DPhiEta(0) | |
88 | ,fH2DPhiEtaR(0) | |
89 | ,fH2DPhiEtaL(0) | |
5a9b5891 | 90 | ,fH2DPhiEtaLR(0) |
a51f90df | 91 | ,fH2DPhiEtaC(0) |
92 | ,fH2DPhiEtaCR(0) | |
320bb308 | 93 | ,fH1Resp(0) |
94 | ,fH1RespR(0) | |
42dc9410 | 95 | ,fH2Sigma(0) |
96 | ,fH2SigmaR(0) | |
19c5a36a | 97 | ,fHDensity(0) |
98 | ,fHCSize(0) | |
99 | ,fHNCluster(0) | |
100 | ,fHPtDensity(0) | |
b31787ca | 101 | ,fHDPhi(0) |
102 | ,fH2EtaPhi(0) | |
103 | ,fH2REtaPhi(0) | |
70f2ce9d | 104 | ,fCuts(0) |
f2b8ec84 | 105 | |
70f2ce9d | 106 | { |
107 | // | |
108 | // Constructor | |
109 | // | |
110 | } | |
111 | ||
112 | //________________________________________________________________________ | |
113 | AliAnalysisTaskKMeans::AliAnalysisTaskKMeans(const char *name) | |
114 | : AliAnalysisTaskSE(name) | |
320bb308 | 115 | ,fK(0) |
42dc9410 | 116 | ,fNMin(0) |
70f2ce9d | 117 | ,fHists(0) |
118 | ,fH1CEta(0) | |
119 | ,fH1CPhi(0) | |
120 | ,fH1CEtaR(0) | |
121 | ,fH2N1N2(0) | |
122 | ,fH1Pt(0) | |
123 | ,fH1PtC(0) | |
124 | ,fH1PtC1(0) | |
125 | ,fH1PtC2(0) | |
42dc9410 | 126 | ,fH1PtAS(0) |
127 | ,fH1PtR(0) | |
a51f90df | 128 | ,fH1SPt(0) |
129 | ,fH1SPtC(0) | |
70f2ce9d | 130 | ,fH1DPhi(0) |
131 | ,fH1DR(0) | |
132 | ,fH1DRR(0) | |
133 | ,fH2DPhiEta(0) | |
134 | ,fH2DPhiEtaR(0) | |
135 | ,fH2DPhiEtaL(0) | |
5a9b5891 | 136 | ,fH2DPhiEtaLR(0) |
a51f90df | 137 | ,fH2DPhiEtaC(0) |
138 | ,fH2DPhiEtaCR(0) | |
320bb308 | 139 | ,fH1Resp(0) |
140 | ,fH1RespR(0) | |
42dc9410 | 141 | ,fH2Sigma(0) |
142 | ,fH2SigmaR(0) | |
19c5a36a | 143 | ,fHDensity(0) |
144 | ,fHCSize(0) | |
145 | ,fHNCluster(0) | |
146 | ,fHPtDensity(0) | |
b31787ca | 147 | ,fHDPhi(0) |
148 | ,fH2EtaPhi(0) | |
149 | ,fH2REtaPhi(0) | |
70f2ce9d | 150 | ,fCuts(0) |
f2b8ec84 | 151 | |
70f2ce9d | 152 | { |
153 | // | |
154 | // Constructor | |
155 | // | |
156 | DefineOutput(1, TList::Class()); | |
157 | } | |
158 | ||
e42693ad | 159 | AliAnalysisTaskKMeans::AliAnalysisTaskKMeans(const AliAnalysisTaskKMeans &res) |
160 | : AliAnalysisTaskSE(res) | |
161 | ,fK(0) | |
162 | ,fNMin(0) | |
163 | ,fHists(0) | |
164 | ,fH1CEta(0) | |
165 | ,fH1CPhi(0) | |
166 | ,fH1CEtaR(0) | |
167 | ,fH2N1N2(0) | |
168 | ,fH1Pt(0) | |
169 | ,fH1PtC(0) | |
170 | ,fH1PtC1(0) | |
171 | ,fH1PtC2(0) | |
172 | ,fH1PtAS(0) | |
173 | ,fH1PtR(0) | |
174 | ,fH1SPt(0) | |
175 | ,fH1SPtC(0) | |
176 | ,fH1DPhi(0) | |
177 | ,fH1DR(0) | |
178 | ,fH1DRR(0) | |
179 | ,fH2DPhiEta(0) | |
180 | ,fH2DPhiEtaR(0) | |
181 | ,fH2DPhiEtaL(0) | |
182 | ,fH2DPhiEtaLR(0) | |
183 | ,fH2DPhiEtaC(0) | |
184 | ,fH2DPhiEtaCR(0) | |
185 | ,fH1Resp(0) | |
186 | ,fH1RespR(0) | |
187 | ,fH2Sigma(0) | |
188 | ,fH2SigmaR(0) | |
f2b8ec84 | 189 | ,fHDensity(0) |
190 | ,fHCSize(0) | |
191 | ,fHNCluster(0) | |
192 | ,fHPtDensity(0) | |
b31787ca | 193 | ,fHDPhi(0) |
194 | ,fH2EtaPhi(0) | |
195 | ,fH2REtaPhi(0) | |
e42693ad | 196 | ,fCuts(0) |
197 | { | |
198 | // Dummy copy constructor | |
199 | } | |
200 | ||
201 | AliAnalysisTaskKMeans& AliAnalysisTaskKMeans::operator=(const AliAnalysisTaskKMeans& /*trclass*/) | |
202 | { | |
203 | // Dummy assignment operator | |
204 | return *this; | |
205 | } | |
206 | ||
207 | ||
70f2ce9d | 208 | |
209 | //________________________________________________________________________ | |
210 | void AliAnalysisTaskKMeans::UserCreateOutputObjects() | |
211 | { | |
212 | // Create histograms | |
213 | // Called once | |
214 | fHists = new TList(); | |
215 | fH1CEta = new TH1F("fH1CEta", "eta distribution of clusters", 90, -1.5, 1.5); | |
216 | fH1CEtaR = new TH1F("fH1CEtaR", "eta distribution of clusters", 90, -1.5, 1.5); | |
217 | fH1CPhi = new TH1F("fH1CPhi", "phi distribution of clusters", 157, 0.0, 2. * TMath::Pi()); | |
218 | fH2N1N2 = new TH2F("fH2N1N2", "multiplicity distribution", 50, 0., 50., 50, 0., 50.); | |
219 | ||
220 | fH1Pt = new TH1F("fH1Pt", "pt distribution",50, 0., 10.); | |
221 | fH1PtC = new TH1F("fH1PtC", "pt distribution",50, 0., 10.); | |
222 | fH1PtC1 = new TH1F("fH1PtC1", "pt distribution",50, 0., 10.); | |
223 | fH1PtC2 = new TH1F("fH1PtC2", "pt distribution",50, 0., 10.); | |
42dc9410 | 224 | fH1PtAS = new TH1F("fH1PtAS", "pt distribution",50, 0., 10.); |
225 | fH1PtR = new TH1F("fH1PtR", "pt distribution",50, 0., 10.); | |
70f2ce9d | 226 | |
a51f90df | 227 | fH1SPt = new TH1F("fH1SPt", "sum pt distribution",50, 0., 10.); |
228 | fH1SPtC = new TH1F("fH1SPtC", "sum pt distribution",50, 0., 10.); | |
229 | ||
5a9b5891 | 230 | fH1DR = new TH1F("fH1DR", "dR distribution", 50, 0., 5.); |
231 | fH1DPhi = new TH1F("fH1DPhi", "dPhi distribution", 31, 0., TMath::Pi()); | |
232 | fH2DPhiEta = new TH2F("fH2DPhiEta","eta phi distribution", 31, 0., TMath::Pi(), 20, 0., 2.); | |
233 | fH2DPhiEtaR = new TH2F("fH2DPhiEtaR","eta phi distribution", 31, 0., TMath::Pi(), 20, 0., 2.); | |
234 | fH2DPhiEtaL = new TH2F("fH2DPhiEtaL","eta phi distribution", 31, 0., TMath::Pi(), 20, 0., 2.); | |
235 | fH2DPhiEtaLR = new TH2F("fH2DPhiEtaLR","eta phi distribution", 31, 0., TMath::Pi(), 20, 0., 2.); | |
236 | fH2DPhiEtaC = new TH2F("fH2DPhiEtaC","eta phi distribution", 31, 0., TMath::Pi(), 20, 0., 2.); | |
237 | fH2DPhiEtaCR = new TH2F("fH2DPhiEtaCR","eta phi distribution", 31, 0., TMath::Pi(), 20, 0., 2.); | |
238 | fH1DRR = new TH1F("fH1DRR", "dR distribution", 50, 0., 5.); | |
320bb308 | 239 | fH1Resp = new TH1F("fH1Resp", "Responsibility", 50, 0., 1.); |
240 | fH1RespR = new TH1F("fH1RespR", "Responsibility", 50, 0., 1.); | |
42dc9410 | 241 | fH2Sigma = new TH2F("fH2Sigma", "Sigma", 31, 0., TMath::Pi(), 20, 0., 2.); |
242 | fH2SigmaR = new TH2F("fH2SigmaR", "Sigma", 31, 0., TMath::Pi(), 20, 0., 2.); | |
19c5a36a | 243 | |
244 | ||
245 | fHDensity = new TH1F("fHDensity", "density distribution", 100, 0., 20.); | |
246 | fHCSize = new TH1F("fHCSize", "cluster size", 20, -0.5, 19.5); | |
247 | ||
248 | fHNCluster = new TH1F("fHNCluster", "Number of clusters", 11, -0.5, 10.5); | |
249 | fHPtDensity = new TH2F("fHPtDensity", "Pt vs density", 100, 0., 20., 50, 0., 10.); | |
b31787ca | 250 | fHDPhi = new TH1F("fHDPhi", "phi correlation", 100, 0., 0.5); |
251 | fH2EtaPhi = new TH2F("fH2EtaPhi", "Eta Phi", 200, -1., 1., 628, 0., 2. * TMath::Pi()); | |
70f2ce9d | 252 | fHists->SetOwner(); |
253 | ||
254 | fHists->Add(fH1CEta); | |
255 | fHists->Add(fH1CEtaR); | |
256 | fHists->Add(fH1CPhi); | |
257 | fHists->Add(fH2N1N2); | |
258 | fHists->Add(fH1Pt); | |
42dc9410 | 259 | fHists->Add(fH1PtR); |
70f2ce9d | 260 | fHists->Add(fH1PtC); |
261 | fHists->Add(fH1PtC1); | |
262 | fHists->Add(fH1PtC2); | |
42dc9410 | 263 | fHists->Add(fH1PtAS); |
70f2ce9d | 264 | fHists->Add(fH1DR); |
a51f90df | 265 | fHists->Add(fH1SPtC); |
266 | fHists->Add(fH1SPt); | |
70f2ce9d | 267 | fHists->Add(fH1DPhi); |
268 | fHists->Add(fH2DPhiEta); | |
269 | fHists->Add(fH2DPhiEtaR); | |
270 | fHists->Add(fH2DPhiEtaL); | |
5a9b5891 | 271 | fHists->Add(fH2DPhiEtaLR); |
a51f90df | 272 | fHists->Add(fH2DPhiEtaC); |
273 | fHists->Add(fH2DPhiEtaCR); | |
70f2ce9d | 274 | fHists->Add(fH1DRR); |
320bb308 | 275 | fHists->Add(fH1RespR); |
276 | fHists->Add(fH1Resp); | |
42dc9410 | 277 | fHists->Add(fH2Sigma); |
19c5a36a | 278 | fHists->Add(fH2SigmaR); |
279 | fHists->Add(fHCSize); | |
280 | fHists->Add(fHDensity); | |
281 | fHists->Add(fHNCluster); | |
282 | fHists->Add(fHPtDensity); | |
b31787ca | 283 | fHists->Add(fHDPhi); |
284 | fHists->Add(fH2EtaPhi); | |
70f2ce9d | 285 | // |
19c5a36a | 286 | for (Int_t i = 0; i < 10; i++) { |
287 | fA[i] = new AliKMeansResult(i+1); | |
288 | fB[i] = new AliKMeansResult(i+1); | |
289 | } | |
70f2ce9d | 290 | } |
291 | ||
292 | //________________________________________________________________________ | |
293 | void AliAnalysisTaskKMeans::UserExec(Option_t *) | |
294 | { | |
295 | // Main loop | |
296 | // Called for each event | |
297 | Double_t phi [500]; | |
298 | Double_t phiR[500]; | |
19c5a36a | 299 | Double_t eta[500]; |
70f2ce9d | 300 | Double_t etaR[500]; |
19c5a36a | 301 | Double_t pt [500]; |
70f2ce9d | 302 | |
303 | if (!fInputEvent) { | |
304 | Printf("ERROR: fESD not available"); | |
305 | return; | |
306 | } | |
307 | ||
70f2ce9d | 308 | |
309 | Int_t ic = 0; | |
19c5a36a | 310 | |
70f2ce9d | 311 | // |
312 | // Fill eta-phi positions | |
313 | // | |
19c5a36a | 314 | |
70f2ce9d | 315 | Double_t ptmax = 0.; |
316 | Int_t icmax = -1; | |
317 | ||
42dc9410 | 318 | for (Int_t iTracks = 0; iTracks < fInputEvent->GetNumberOfTracks(); iTracks++) { |
319 | AliVParticle* track = fInputEvent->GetTrack(iTracks); | |
320 | if ((fCuts->AcceptTrack((AliESDtrack*)track))) | |
70f2ce9d | 321 | { |
b31787ca | 322 | const AliExternalTrackParam * tpcT = ((AliESDtrack*) track)->GetTPCInnerParam(); |
323 | if (!tpcT) continue; | |
324 | if (TMath::Abs(tpcT->Eta()) > 0.9) continue; | |
325 | ||
326 | phi [ic] = tpcT->Phi(); | |
327 | eta [ic] = tpcT->Eta(); | |
328 | pt [ic] = tpcT->Pt(); | |
329 | ||
330 | if (fH2REtaPhi) { | |
331 | fH2REtaPhi->GetRandom2(etaR[ic], phiR[ic]); | |
332 | } else { | |
333 | phiR[ic] = 2. * TMath::Pi() * gRandom->Rndm(); | |
334 | etaR[ic] = 1.8 * gRandom->Rndm() - 0.9; | |
335 | } | |
336 | ||
337 | ||
70f2ce9d | 338 | if (pt[ic] > ptmax) { |
339 | ptmax = pt[ic]; | |
340 | icmax = ic; | |
341 | } | |
b31787ca | 342 | |
343 | fH2EtaPhi->Fill(eta[ic], phi[ic]); | |
70f2ce9d | 344 | ic++; |
345 | } | |
346 | } //track loop | |
347 | ||
b31787ca | 348 | for (Int_t i = 0; i < ic; i++) { |
349 | for (Int_t j = i+1; j < ic; j++) { | |
350 | Double_t dphi = TMath::Abs(phi[i] - phi[j]); | |
351 | fHDPhi->Fill(dphi); | |
352 | } | |
353 | } | |
354 | ||
70f2ce9d | 355 | // |
356 | // Cluster | |
42dc9410 | 357 | if (ic < fNMin) { |
70f2ce9d | 358 | PostData(1, fHists); |
359 | return; | |
360 | } | |
b31787ca | 361 | |
70f2ce9d | 362 | // |
43760a73 | 363 | Double_t rk0[10]; |
19c5a36a | 364 | AliKMeansResult* res = 0; |
b31787ca | 365 | AliKMeansResult best(10); |
366 | Float_t rmaxG = -1.; | |
19c5a36a | 367 | |
b31787ca | 368 | for (Int_t k = 0; k < 20; k++) { |
369 | Float_t rmax = -1.; | |
370 | Int_t imax = 0; | |
371 | for (Int_t i = 0; i < fK; i++) { | |
372 | res = fA[i]; | |
373 | AliKMeansClustering::SoftKMeans2(i+1, ic, phi, eta, res->GetMx(),res->GetMy(), res->GetSigma2(), res->GetRk()); | |
374 | res->Sort(ic, phi, eta); | |
375 | Int_t j = (res->GetInd())[0]; | |
376 | rk0[i] = (res->GetTarget())[j]; | |
377 | if (rk0[i] > rmax) { | |
19c5a36a | 378 | rmax = rk0[i]; |
379 | imax = i; | |
380 | } | |
b31787ca | 381 | } |
382 | if (rmax > rmaxG) { | |
383 | rmaxG = rmax; | |
384 | best.CopyResults(fA[imax]); | |
385 | } | |
19c5a36a | 386 | } |
b31787ca | 387 | Double_t* mPhi = best.GetMx(); |
388 | Double_t* mEta = best.GetMy(); | |
389 | Double_t* sigma2 = best.GetSigma2(); | |
390 | Int_t nk = best.GetK(); | |
391 | Int_t im = (best.GetInd())[0]; | |
392 | Double_t etaC = mEta[im]; | |
393 | ||
394 | fHDensity->Fill(rmaxG / TMath::Pi()); | |
395 | fHCSize->Fill(2.28 * rmaxG * sigma2[im]); | |
19c5a36a | 396 | fHNCluster->Fill(Float_t(nk)); |
397 | ||
42dc9410 | 398 | Double_t dphic, detac; |
42dc9410 | 399 | |
b31787ca | 400 | if (rmaxG > 0. && TMath::Abs(etaC) < 0.4) { |
42dc9410 | 401 | // Analysis |
402 | // | |
403 | // Cluster Multiplicity | |
404 | Int_t mult[2] = {0, 0}; | |
405 | // | |
19c5a36a | 406 | if (nk > 1) { |
407 | dphic = DeltaPhi(mPhi[0], mPhi[1]); | |
408 | detac = TMath::Abs(mEta[0] - mEta[1]); | |
409 | fH2DPhiEtaC->Fill(dphic, detac); | |
410 | } | |
42dc9410 | 411 | // |
412 | // Random cluster position | |
413 | Int_t ir = Int_t(Float_t(ic) * gRandom->Rndm()); | |
a51f90df | 414 | |
42dc9410 | 415 | Double_t crPhi = phi[ir]; |
416 | Double_t crEta = eta[ir]; | |
417 | // | |
418 | Double_t sumPt = 0; | |
419 | Double_t sumPtC = 0; | |
19c5a36a | 420 | |
42dc9410 | 421 | for (Int_t i = 0; i < 1; i++) { |
19c5a36a | 422 | fH1CEta->Fill(mEta[im]); |
423 | fH1CPhi->Fill(mPhi[im]); | |
70f2ce9d | 424 | for (Int_t j = 0; j < ic; j++) { |
19c5a36a | 425 | Double_t r = DeltaR(mPhi[im], mEta[im], phi[j], eta[j]); |
426 | Double_t dphi = DeltaPhi(mPhi[im], phi[j]); | |
427 | Double_t deta = mEta[im] - eta[j]; | |
42dc9410 | 428 | Double_t rr = DeltaR(crPhi, crEta, phi[j], eta[j]); |
19c5a36a | 429 | |
42dc9410 | 430 | fH1DR->Fill(r); |
431 | fH1DPhi->Fill(dphi); | |
432 | fH2DPhiEta->Fill(dphi, TMath::Abs(deta)); | |
433 | if (j == icmax) fH2DPhiEtaL->Fill(dphi, TMath::Abs(deta)); | |
434 | ||
435 | if (r < 0.2) { | |
436 | fH1PtC2->Fill(pt[j]); | |
437 | } | |
19c5a36a | 438 | if (r < 0.3) { |
439 | fH1PtC1->Fill(pt[j]); | |
b31787ca | 440 | fHPtDensity->Fill(rmaxG/TMath::Pi(), pt[j]); |
19c5a36a | 441 | } |
442 | if (rr < 0.3) { | |
42dc9410 | 443 | fH1PtR->Fill(pt[j]); |
19c5a36a | 444 | } |
42dc9410 | 445 | |
19c5a36a | 446 | if (r < 0.4) { |
447 | sumPtC += pt[j]; | |
448 | mult[i]++; | |
449 | fH1PtC->Fill(pt[j]); | |
450 | } | |
451 | if (r > 0.7 && dphi < (TMath::Pi() - 0.3)) { | |
42dc9410 | 452 | fH1Pt->Fill(pt[j]); |
453 | } | |
454 | ||
455 | if (r > 0.7 && r < 1.) { | |
456 | sumPt += pt[j]; | |
457 | } | |
19c5a36a | 458 | |
42dc9410 | 459 | if (dphi > (TMath::Pi() - 0.3)) { |
b31787ca | 460 | fH1PtAS->Fill(pt[j], 1.); |
42dc9410 | 461 | } |
70f2ce9d | 462 | } |
42dc9410 | 463 | } |
70f2ce9d | 464 | |
42dc9410 | 465 | fH2N1N2->Fill(Float_t(mult[0]), Float_t(mult[1])); |
466 | fH1SPt ->Fill(sumPt); | |
467 | fH1SPtC->Fill(sumPtC); | |
19c5a36a | 468 | } |
42dc9410 | 469 | // |
19c5a36a | 470 | // Randomized phi |
42dc9410 | 471 | // |
b31787ca | 472 | rmaxG = -1.; |
473 | for (Int_t k = 0; k < 20; k++) { | |
474 | Float_t rmax = -1.; | |
475 | Int_t imax = 0; | |
19c5a36a | 476 | for (Int_t i = 0; i < fK; i++) { |
477 | res = fB[i]; | |
478 | AliKMeansClustering::SoftKMeans2(i+1, ic, phiR, etaR, res->GetMx(),res->GetMy(), res->GetSigma2(), res->GetRk()); | |
479 | res->Sort(ic, phiR, etaR); | |
19c5a36a | 480 | Int_t j = (res->GetInd())[0]; |
481 | rk0[i] = (res->GetTarget())[j]; | |
19c5a36a | 482 | if (rk0[i] > rmax) { |
b31787ca | 483 | rmax = rk0[i]; |
484 | imax = i; | |
485 | } | |
19c5a36a | 486 | } |
b31787ca | 487 | if (rmax > rmaxG) { |
488 | rmaxG = rmax; | |
489 | best.CopyResults(fB[imax]); | |
490 | } | |
491 | } | |
492 | ||
493 | mPhi = best.GetMx(); | |
494 | mEta = best.GetMy(); | |
b31787ca | 495 | nk = best.GetK(); |
496 | im = (best.GetInd())[0]; | |
497 | etaC = mEta[im]; | |
498 | ||
19c5a36a | 499 | // |
500 | // Cluster Multiplicity | |
b31787ca | 501 | if (rmaxG > 0. && TMath::Abs(etaC) < 0.4) { |
19c5a36a | 502 | for (Int_t i = 0; i < 1; i++) { |
c87f0b8c | 503 | im = (best.GetInd())[i]; |
19c5a36a | 504 | fH1CEtaR->Fill(mEta[im]); |
505 | } | |
506 | ||
507 | for (Int_t i = 0; i < 1; i++) { | |
c87f0b8c | 508 | im = (best.GetInd())[i]; |
19c5a36a | 509 | for (Int_t j = 0; j < ic; j++) { |
510 | Double_t dphi = DeltaPhi(mPhi[im], phiR[j]); | |
511 | Double_t deta = mEta[im] - etaR[j]; | |
512 | Double_t r = DeltaR(mPhi[im], mEta[im], phiR[j], etaR[j]); | |
513 | fH1DRR->Fill(r); | |
514 | fH2DPhiEtaR->Fill(dphi, TMath::Abs(deta)); | |
515 | if (j == icmax) fH2DPhiEtaLR->Fill(dphi, TMath::Abs(deta)); | |
516 | } | |
517 | } | |
518 | if (nk > 1) { | |
519 | dphic = DeltaPhi(mPhi[0], mPhi[1]); | |
520 | detac = TMath::Abs(mEta[0] - mEta[1]); | |
521 | fH2DPhiEtaCR->Fill(dphic, detac); | |
70f2ce9d | 522 | } |
42dc9410 | 523 | } |
19c5a36a | 524 | PostData(1, fHists); |
70f2ce9d | 525 | } |
526 | ||
527 | Double_t AliAnalysisTaskKMeans::DeltaPhi(Double_t phi1, Double_t phi2) | |
528 | { | |
529 | Double_t dphi = TMath::Abs(phi1 - phi2); | |
530 | if (dphi > TMath::Pi()) dphi = 2. * TMath::Pi() - dphi; | |
531 | return dphi; | |
532 | } | |
533 | ||
534 | Double_t AliAnalysisTaskKMeans::DeltaR(Double_t phi1, Double_t eta1, Double_t phi2, Double_t eta2) | |
535 | { | |
536 | Double_t dphi = DeltaPhi(phi1, phi2); | |
537 | Double_t deta = eta1 - eta2; | |
538 | return (TMath::Sqrt(dphi * dphi + deta * deta)); | |
539 | ||
540 | } | |
541 | ||
542 | //________________________________________________________________________ | |
543 | void AliAnalysisTaskKMeans::Terminate(Option_t *) | |
544 | { | |
545 | } | |
546 |