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b8bfee30 1/**************************************************************************
2 * Copyright(c) 1998-1999, 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
17//-----------------------------------------------------------------
18// Base class for combining PID of different detectors //
19// (user selected) and compute Bayesian probabilities //
20// //
21// //
22// Origin: Pietro Antonioli, INFN-BO Pietro.Antonioli@cern.ch //
23// //
24//-----------------------------------------------------------------
25
26#include <TH1.h>
27
28#include <AliVTrack.h>
29#include <AliLog.h>
30#include <AliPID.h>
31#include <AliPIDResponse.h>
32
33#include "AliPIDCombined.h"
34
80f28562 35#include "TMath.h"
36#include "TFile.h"
37
38#include "AliOADBContainer.h"
39
40// initialize static members
00a38d07 41TH2F* AliPIDCombined::fDefaultPriorsTPC[]={0x0};
42fcc729 42Float_t AliPIDCombined::fTOFmismProb = 0;
80f28562 43
44ClassImp(AliPIDCombined);
45
b8bfee30 46AliPIDCombined::AliPIDCombined():
47 TNamed("CombinedPID","CombinedPID"),
48 fDetectorMask(0),
49 fRejectMismatchMask(0x7F),
50 fEnablePriors(kTRUE),
80f28562 51 fSelectedSpecies(AliPID::kSPECIES),
52 fUseDefaultTPCPriors(kFALSE)
b8bfee30 53{
54 //
55 // default constructor
56 //
00a38d07 57 for (Int_t i=0;i<AliPID::kSPECIESC;i++) fPriorsDistributions[i]=NULL;
b8bfee30 58 AliLog::SetClassDebugLevel("AliPIDCombined",10);
59}
60
61//-------------------------------------------------------------------------------------------------
62AliPIDCombined::AliPIDCombined(const TString& name,const TString& title):
63 TNamed(name,title),
64 fDetectorMask(0),
65 fRejectMismatchMask(0x7F),
66 fEnablePriors(kTRUE),
80f28562 67 fSelectedSpecies(AliPID::kSPECIES),
68 fUseDefaultTPCPriors(kFALSE)
b8bfee30 69{
70 //
71 // default constructor with name and title
72 //
00a38d07 73 for (Int_t i=0;i<AliPID::kSPECIESC;i++) fPriorsDistributions[i]=NULL;
b8bfee30 74 AliLog::SetClassDebugLevel("AliPIDCombined",10);
75
76}
77
78//-------------------------------------------------------------------------------------------------
79AliPIDCombined::~AliPIDCombined() {
80
00a38d07 81 for(Int_t i=0;i < AliPID::kSPECIESC;i++){
b8bfee30 82 if(fPriorsDistributions[i])
83 delete fPriorsDistributions[i];
84 }
85}
86
87//-------------------------------------------------------------------------------------------------
88void AliPIDCombined::SetPriorDistribution(AliPID::EParticleType type,TH1F *prior) {
00a38d07 89 if ( (type < 0) || ( type >= ((AliPID::EParticleType)AliPID::kSPECIESC) ) ){
b8bfee30 90 AliError(Form("Invalid EParticleType setting prior (offending type: %d)",type));
91 return;
92 }
93 if(prior) {
8de3b790 94 Int_t i = (Int_t)type;
b8bfee30 95 if (fPriorsDistributions[i]) {
96 delete fPriorsDistributions[i];
97 }
98 fPriorsDistributions[i]=new TH1F(*prior);
99 }
100}
101
102//-------------------------------------------------------------------------------------------------
103UInt_t AliPIDCombined::ComputeProbabilities(const AliVTrack *track, const AliPIDResponse *response, Double_t* bayesProbabilities) const {
3ed61c90 104 //
105 // (1) Get raw probabilities of requested detectors and combine
106 // (2) Get priors and propagate depending on detectors used
107 // (3) Compute Bayes probabilities
108 //
b8bfee30 109
110
3ed61c90 111 // (1) Get raw probabilities of selected detectors and combine
112 UInt_t usedMask=0; // detectors actually used for track
42fcc729 113 fTOFmismProb = 0; // reset TOF mismatch weights
114
3ed61c90 115 AliPIDResponse::EDetPidStatus status=AliPIDResponse::kDetNoSignal;
116 Double_t p[fSelectedSpecies]; // combined probabilities of selected detectors
42fcc729 117 Double_t pMismTOF[fSelectedSpecies]; // combined TOF mismatch probabilities using selected detectors
118 for (Int_t i=0;i<fSelectedSpecies;i++){ p[i]=1.;pMismTOF[i]=1.;} // no decision
3ed61c90 119 for (Int_t ibit = 0; ibit < 7 ; ibit++) {
120 AliPIDResponse::EDetCode detBit = (AliPIDResponse::EDetCode)(1<<ibit);
121 if (fDetectorMask & detBit) { // getting probabilities for requested detectors only
122 Double_t detProb[fSelectedSpecies];
123 status = response->ComputePIDProbability(detBit,track,fSelectedSpecies,detProb);
124 if (status == AliPIDResponse::kDetPidOk) {
125 if (fRejectMismatchMask & detBit) { // mismatch check (currently just for TOF)
126 if (detBit == AliPIDResponse::kDetTOF) {
42fcc729 127 fTOFmismProb = response->GetTOFMismatchProbability(); // mismatch weights computed with TOF probs (no arguments)
128 Float_t probMis = response->GetTOFMismatchProbability(track); // mismatch compatibility TPC-TOF cut
3ed61c90 129 SetCombinedStatus(status,&usedMask,detBit,detProb,probMis);
130 } else {
131 SetCombinedStatus(status,&usedMask,detBit);
132 }
133 } else {
134 SetCombinedStatus(status,&usedMask,detBit);
b8bfee30 135 }
42fcc729 136 for (Int_t i=0;i<fSelectedSpecies;i++){
137 p[i] *= detProb[i];
138 if(detBit == AliPIDResponse::kDetTOF) pMismTOF[i] *= fTOFmismProb;
139 else pMismTOF[i] *= detProb[i];
140 }
3ed61c90 141 }
142 }
143 }
144 // if no detectors available there is no point to go further
145 if (usedMask == 0) return usedMask;
146
147 // (2) Get priors and propagate depending on detectors used
148 Double_t priors[fSelectedSpecies];
149 memset(priors,0,fSelectedSpecies*sizeof(Double_t));
150 if (fEnablePriors){
151 GetPriors(track,priors,response->GetCurrentCentrality());
6d4e360d
AM		 152
153 // We apply the propagation factors of the more external detector
154 //
155 // TPC+HMPID --> apply HMPID propagation factors (TRD and TOF may be present)
3ed61c90 156 // TPC+EMCAL --> apply EMCAL propagation factors (TRD and TOF may be present)
6d4e360d
AM		 157 // TPC+TOF --> apply TOF propagation factors (TRD may be present, HMPID and EMCAL not (if requested))
158 // TPC+TRD --> apply TRD propagation factors (TOF, HMPID and EMCAL not present (if requested) )
159 //
3ed61c90 160 if(fUseDefaultTPCPriors) {
6d4e360d 161
3ed61c90 162 Double_t pt=TMath::Abs(track->Pt());
6d4e360d
AM		 163 if ( ( (usedMask & AliPIDResponse::kDetEMCAL)==AliPIDResponse::kDetEMCAL) || ( (usedMask & AliPIDResponse::kDetHMPID)==AliPIDResponse::kDetHMPID) ) {
164 // we assume EMCAL and HMPID cannot be simultaneously present
165 if ( (usedMask & AliPIDResponse::kDetEMCAL)==AliPIDResponse::kDetEMCAL ) {
3ed61c90 166 // EMCal case (for the moment only in combination with TPC)
167 // propagation factors determined from LHC11d MC (LHC12a15f)
168 // v2 clusterizer, dEta < 0.015, dPhi < 0.03, NonLinearityFunction = 6
44bea91d 169
3ed61c90 170 Float_t electronEMCALfactor=0.1;
171 Float_t kaonEMCALfactor = 0.1;
172 Float_t protonEMCALfactor = 0.1;
44bea91d 173
3ed61c90 174 if(track->Charge() > 0){
175 // positiv charge (start parametrization at 0.75 GeV/c and stop at 20 GeV/c for the moment)
176 if(pt > 0.75 && pt < 20.0){
177 electronEMCALfactor = ( 0.214159 * ( 1 - TMath::Exp(-TMath::Power(pt,0.484512)/0.700499)*TMath::Power(pt,-0.669644)) ) / ( 0.210436 * ( 1 - TMath::Exp(-TMath::Power(pt,-0.219228)/0.947432)*TMath::Power(pt,-0.700792)) );
178 kaonEMCALfactor = ( 0.208686 * ( 1 - TMath::Exp(-TMath::Power(pt,-3.98149e-05)/1.28447)*TMath::Power(pt,-0.629191)) ) / ( 0.210436 * ( 1 - TMath::Exp(-TMath::Power(pt,-0.219228)/0.947432)*TMath::Power(pt,-0.700792)) );
179 protonEMCALfactor = ( 0.27555 * ( 1 - TMath::Exp(-TMath::Power(pt,-1.97226e-05)/1.52719)*TMath::Power(pt,-0.209068)) ) / ( 0.210436 * ( 1 - TMath::Exp(-TMath::Power(pt,-0.219228)/0.947432)*TMath::Power(pt,-0.700792)) );
44bea91d 180
3ed61c90 181 }
182 }
44bea91d 183
3ed61c90 184 if(track->Charge() < 0){
185 // negative charge (start parametrization at 0.75 GeV/c and stop at 20 GeV/c for the moment)
186 if(pt > 0.75 && pt < 20.0){
187 electronEMCALfactor = ( 0.216895 * ( 1 - TMath::Exp(-TMath::Power(pt,0.000105924)/0.865938)*TMath::Power(pt,-1.32787)) ) / ( 0.210385 * ( 1 - TMath::Exp(-TMath::Power(pt,4.41206e-07)/1.08984)*TMath::Power(pt,-0.544375)) );
188 kaonEMCALfactor = ( 0.204117 * ( 1 - TMath::Exp(-TMath::Power(pt,-1.6853e-05)/1.61765)*TMath::Power(pt,-0.738355)) ) / ( 0.210385 * ( 1 - TMath::Exp(-TMath::Power(pt,4.41206e-07)/1.08984)*TMath::Power(pt,-0.544375)) );
189 protonEMCALfactor = ( 0.215679 * ( 1 - TMath::Exp(-TMath::Power(pt,-4.10015e-05)/1.40921)*TMath::Power(pt,-0.533752)) ) / ( 0.210385 * ( 1 - TMath::Exp(-TMath::Power(pt,4.41206e-07)/1.08984)*TMath::Power(pt,-0.544375)) );
190 }
191 }
192 priors[0] *= electronEMCALfactor;
193 priors[3] *= kaonEMCALfactor;
194 priors[4] *= protonEMCALfactor;
195 } // end of EMCAL case
6d4e360d
AM		 196
197 else if ( (usedMask & AliPIDResponse::kDetHMPID)==AliPIDResponse::kDetHMPID ) { // HMPID case
198
199 Float_t kaonHMPIDfactor = 0.;
200 Float_t protonHMPIDfactor = 0.;
201 if(pt>1. && pt<6.) kaonHMPIDfactor = (-0.0729337 + pt*0.0999531 - pt*pt*0.0371803 + pt*pt*pt*0.00706436 - pt*pt*pt*pt*0.000643619 + pt*pt*pt*pt*pt*2.21853e-05)/(-0.00896231+ pt*0.0330702 - pt*pt*0.0109562+ pt*pt*pt*0.00232895 - pt*pt*pt*pt*0.000246143 + pt*pt*pt*pt*pt*9.59812e-06);
202 if(pt>1.4 && pt<6.) protonHMPIDfactor = (-0.0444188 + pt*0.0681506 - pt*pt*0.0231819 + pt*pt*pt*0.00400771 - pt*pt*pt*pt*0.000339315 + pt*pt*pt*pt*pt*1.12616e-05)/(-0.00896231+ pt*0.0330702 - pt*pt*0.0109562+ pt*pt*pt*0.00232895 - pt*pt*pt*pt*0.000246143 + pt*pt*pt*pt*pt*9.59812e-06);
203 if(pt>6. && pt<8.) kaonHMPIDfactor = (-0.0729337 + pt*0.0999531 - pt*pt*0.0371803 + pt*pt*pt*0.00706436 - pt*pt*pt*pt*0.000643619 + pt*pt*pt*pt*pt*2.21853e-05)/0.0530456;
204 if(pt>8.) kaonHMPIDfactor = 0.0550432/0.0530456;
205 if(pt>6. && pt<8.5) protonHMPIDfactor = (-0.0444188 + pt*0.0681506 - pt*pt*0.0231819 + pt*pt*pt*0.00400771 - pt*pt*pt*pt*0.000339315 + pt*pt*pt*pt*pt*1.12616e-05)/0.0530456;
206 if(pt>8.5) protonHMPIDfactor = 0.0530071/0.0530456;
207
208 if(track->Charge() < 0){
209 if(pt>0.4 && pt<6.) protonHMPIDfactor = (-0.0351485 + pt*0.0473821 - pt*pt*0.0147947 + pt*pt*pt*0.00254811- pt*pt*pt*pt*0.000224724 + pt*pt*pt*pt*pt*7.9303e-06)/(-0.00896231+ pt*0.0330702 - pt*pt*0.0109562+ pt*pt*pt*0.00232895 - pt*pt*pt*pt*0.000246143 + pt*pt*pt*pt*pt*9.59812e-06);
210 if(pt>6. && pt<8.5) protonHMPIDfactor = (-0.0351485 + pt*0.0473821 - pt*pt*0.0147947 + pt*pt*pt*0.00254811- pt*pt*pt*pt*0.000224724 + pt*pt*pt*pt*pt*7.9303e-06)/0.0530456;
211 if(pt>8.5) protonHMPIDfactor = 0.0457756/0.0530456;
212 }
213
214 priors[3] *= kaonHMPIDfactor;
215 priors[4] *= protonHMPIDfactor;
216
217 }
218
219 } // end of outer cases: EMCAL/HMPID
3ed61c90 220 else if ( (usedMask & AliPIDResponse::kDetTOF) == AliPIDResponse::kDetTOF ){
221 Float_t kaonTOFfactor = 0.1;
222 if(pt > 0.35) kaonTOFfactor = 1 - TMath::Exp(-TMath::Power(pt,4.19618E-07)/5.68017E-01)*TMath::Power(pt,-1.50705);
223 Float_t protonTOFfactor = 0.1;
224 if(pt > 0.4) protonTOFfactor = 1 - TMath::Exp(-TMath::Power(pt,3.30978)/8.57396E-02)*TMath::Power(pt,-4.42661E-01);
df0293b3 225
3ed61c90 226 if(track->Charge() < 0){ // for negative tracks
227 kaonTOFfactor *= 1 - TMath::Exp(-TMath::Power(pt,4.87912E-07)/3.26431E-01)*TMath::Power(pt,-1.22893);
228 protonTOFfactor *= 1 - TMath::Exp(-TMath::Power(pt,2.00575E-07)/4.95605E-01)*TMath::Power(pt,-6.71305E-01);
229 }
230 // TODO: we may need an electron factor for TOF as well, especially if TRD is present!
231 priors[3] *= kaonTOFfactor;
232 priors[4] *= protonTOFfactor;
233 } // end of TOF case
234 else if ( (usedMask & AliPIDResponse::kDetTRD)==AliPIDResponse::kDetTRD ) {
235 Float_t electronTRDfactor=0.1;
236 Float_t kaonTRDfactor = 0.1;
237 Float_t protonTRDfactor = 0.1;
df0293b3 238
3ed61c90 239 if(track->Charge() > 0){
240 // positiv charge
241 if(pt > 0.25) electronTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,5.13315e-03)/2.11145e-01)*TMath::Power(pt,-2.97659e+00);
242 if(pt > 0.35) kaonTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,-4.29549e-02)/4.87989e-01)*TMath::Power(pt,-1.54270e+00);
243 if(pt > 0.35) protonTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,2.81238e+00)/7.57082e-02)*TMath::Power(pt,-8.12595e-01);
244 }
df0293b3 245
3ed61c90 246 if(track->Charge() < 0){
247 // negative charge
248 if(pt > 0.25) electronTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,2.45537e-02)/1.90397e-01)*TMath::Power(pt,-3.33121e+00);
249 if(pt > 0.35) kaonTRDfactor = 1 - TMath::Exp(-TMath::Power(pt, -3.42831e-03)/5.57013e-01)*TMath::Power(pt,-1.39202e+00);
250 if(pt > 0.35) protonTRDfactor = 1 - TMath::Exp(-TMath::Power(pt,3.36631e+00)/7.18819e-02)*TMath::Power(pt,-2.00577e-01);
251 }
252 // what about electrons
253 priors[0] *= electronTRDfactor;
254 priors[3] *= kaonTRDfactor;
255 priors[4] *= protonTRDfactor;
256 } // end of TRD case
257 } // end of fUseDefaultTPCPriors
258 } // end of use priors
259 else { for (Int_t i=0;i<fSelectedSpecies;i++) priors[i]=1.;}
260
261 // (3) Compute Bayes probabilities
262 ComputeBayesProbabilities(bayesProbabilities,p,priors);
42fcc729 263
264 // compute TOF probability contribution from mismatch
265 fTOFmismProb = 0;
266 for (Int_t i=0;i<fSelectedSpecies;i++) fTOFmismProb += pMismTOF[i];
267
3ed61c90 268 return usedMask;
b8bfee30 269}
270
271
272//-------------------------------------------------------------------------------------------------
80f28562 273void AliPIDCombined::GetPriors(const AliVTrack *track, Double_t* p,Float_t centrality) const {
b8bfee30 274
275 //
276 // get priors from distributions
277 //
278
279 Double_t pt=TMath::Abs(track->Pt());
80f28562 280
281 if(fUseDefaultTPCPriors){ // use default priors if requested
282 Float_t usedCentr = centrality+5*(centrality>0);
283 if(usedCentr < -0.99) usedCentr = -0.99;
284 else if(usedCentr > 99) usedCentr = 99;
285 if(pt > 9.99) pt = 9.99;
286 else if(pt < 0.01) pt = 0.01;
287
288 for(Int_t i=0;i<5;i++) p[i] = fDefaultPriorsTPC[i]->Interpolate(usedCentr,pt);
289
290 return;
291 }
292
b8bfee30 293 Double_t sumPriors = 0;
294 for (Int_t i=0;i<fSelectedSpecies;++i){
295 if (fPriorsDistributions[i]){
296 p[i]=fPriorsDistributions[i]->Interpolate(pt);
297 }
298 else {
299 p[i]=0.;
300 }
301 sumPriors+=p[i];
302 }
303
304 // normalizing priors
305 if (sumPriors == 0) return;
306 for (Int_t i=0;i<fSelectedSpecies;++i){
307 p[i]=p[i]/sumPriors;
308 }
309 return;
310}
80f28562 311//-------------------------------------------------------------------------------------------------
312void AliPIDCombined::GetPriors(const AliVTrack *track,Double_t* p,const AliPIDResponse *response,UInt_t detUsed) const{
313
314 //
315 // get priors from distributions
316 //
317 Double_t pt=TMath::Abs(track->Pt());
318
319 if(fUseDefaultTPCPriors){ // use default priors if requested
320 Float_t usedCentr = response->GetCurrentCentrality()+5*(response->GetCurrentCentrality()>0);
321 if(usedCentr < -0.99) usedCentr = -0.99;
322 else if(usedCentr > 99) usedCentr = 99;
323 if(pt > 9.99) pt = 9.99;
324 else if(pt < 0.01) pt = 0.01;
325
326 for(Int_t i=0;i<5;i++) p[i] = fDefaultPriorsTPC[i]->Interpolate(usedCentr,pt);
327
328 // Extra factor if TOF matching was required
329 if(detUsed & AliPIDResponse::kDetTOF){
330 Float_t kaonTOFfactor = 0.1;
331 if(pt > 0.35) kaonTOFfactor = 1 - TMath::Exp(-TMath::Power(pt,4.19618E-07)/5.68017E-01)*TMath::Power(pt,-1.50705);
332 Float_t protonTOFfactor = 0.1;
333 if(pt > 0.4) protonTOFfactor = 1 - TMath::Exp(-TMath::Power(pt,3.30978)/8.57396E-02)*TMath::Power(pt,-4.42661E-01);
334
335 if(track->Charge() < 0){ // for negative tracks
336 kaonTOFfactor *= 1 - TMath::Exp(-TMath::Power(pt,4.87912E-07)/3.26431E-01)*TMath::Power(pt,-1.22893);
337 protonTOFfactor *= 1 - TMath::Exp(-TMath::Power(pt,2.00575E-07)/4.95605E-01)*TMath::Power(pt,-6.71305E-01);
338 }
339
340 p[3] *= kaonTOFfactor;
341 p[4] *= protonTOFfactor;
342 }
343
344 return;
345 }
346
347
348 Double_t sumPriors = 0;
349 for (Int_t i=0;i<fSelectedSpecies;++i){
350 if (fPriorsDistributions[i]){
351 p[i]=fPriorsDistributions[i]->Interpolate(pt);
352 }
353 else {
354 p[i]=0.;
355 }
356 sumPriors+=p[i];
357 }
b8bfee30 358
80f28562 359 // normalizing priors
360 if (sumPriors == 0) return;
361 for (Int_t i=0;i<fSelectedSpecies;++i){
362 p[i]=p[i]/sumPriors;
363 }
364 return;
365}
b8bfee30 366//-------------------------------------------------------------------------------------------------
42fcc729 367void AliPIDCombined::ComputeBayesProbabilities(Double_t* probabilities, const Double_t* probDensity, const Double_t* prior, Double_t* probDensityMism) const {
b8bfee30 368
369
370 //
371 // calculate Bayesian probabilities
372 //
373 Double_t sum = 0.;
374 for (Int_t i = 0; i < fSelectedSpecies; i++) {
375 sum += probDensity[i] * prior[i];
376 }
377 if (sum <= 0) {
80f28562 378
b8bfee30 379 AliError("Invalid probability densities or priors");
380 for (Int_t i = 0; i < fSelectedSpecies; i++) probabilities[i] = -1;
381 return;
382 }
383 for (Int_t i = 0; i < fSelectedSpecies; i++) {
384 probabilities[i] = probDensity[i] * prior[i] / sum;
42fcc729 385 if(probDensityMism) probDensityMism[i] *= prior[i] / sum;
b8bfee30 386 }
387
388
389}
390
3ed61c90 391
b8bfee30 392//----------------------------------------------------------------------------------------
3ed61c90 393void AliPIDCombined::SetCombinedStatus(AliPIDResponse::EDetPidStatus status, UInt_t *maskDetIn, AliPIDResponse::EDetCode bit) const {
b8bfee30 394 switch (status) {
3ed61c90 395 case AliPIDResponse::kDetNoParams:
396 case AliPIDResponse::kDetNoSignal:
397 case AliPIDResponse::kDetMismatch: // for backward compatibilty, we need then to remove kDetMismatch from AliPIDResponse
b8bfee30 398 break;
399 case AliPIDResponse::kDetPidOk:
400 *maskDetIn = *maskDetIn | bit;
401 break;
3ed61c90 402 }
403
404}
405
406//----------------------------------------------------------------------------------------
407void AliPIDCombined::SetCombinedStatus(AliPIDResponse::EDetPidStatus status, UInt_t *maskDetIn, AliPIDResponse::EDetCode bit, Double_t* p, const Float_t probMis) const {
408 switch (status) {
409 case AliPIDResponse::kDetNoParams:
410 case AliPIDResponse::kDetNoSignal:
411 case AliPIDResponse::kDetMismatch: // for backward compatibility, we need then to remove kDeteMismatch from AliPIDResponse
412 break;
413 case AliPIDResponse::kDetPidOk:
414 if (probMis > 0.5) for (Int_t j=0;j<fSelectedSpecies;j++) p[j]=1./fSelectedSpecies;
415 else *maskDetIn = *maskDetIn | bit;
b8bfee30 416 break;
417 }
418
419}
420
3ed61c90 421
422
80f28562 423//----------------------------------------------------------------------------------------
424void AliPIDCombined::SetDefaultTPCPriors(){
425 fEnablePriors=kTRUE;
426 fUseDefaultTPCPriors = kTRUE;
427
00a38d07 428 //check if priors are already initialized
429 if (fDefaultPriorsTPC[0]) return;
430
80f28562 431 TString oadbfilename("$ALICE_ROOT/OADB/COMMON/PID/data/");
432 oadbfilename += "/PIDdefaultPriors.root";
433 TFile * foadb = TFile::Open(oadbfilename.Data());
00a38d07 434 if(!foadb || !foadb->IsOpen()) {
435 delete foadb;
436 AliFatal(Form("Cannot open OADB file %s", oadbfilename.Data()));
437 return;
438 }
80f28562 439
440 AliOADBContainer * priorsContainer = (AliOADBContainer*) foadb->Get("priorsTPC");
441 if (!priorsContainer) AliFatal("Cannot fetch OADB container for Priors");
442
00a38d07 443 const char *namespecies[AliPID::kSPECIES] = {"El","Mu","Pi","Ka","Pr"};
80f28562 444 char name[100];
445
00a38d07 446 for(Int_t i=0;i < AliPID::kSPECIES;i++){
4c234df8 447 snprintf(name,99,"hDefault%sPriors",namespecies[i]);
80f28562 448 fDefaultPriorsTPC[i] = (TH2F*) priorsContainer->GetDefaultObject(name);
449 if (!fDefaultPriorsTPC[i]) AliFatal(Form("Cannot find priors for %s", namespecies[i]));
450 }
00a38d07 451
452 delete foadb;
80f28562 453}