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