]>
Commit | Line | Data |
---|---|---|
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 | // AliHMPIDReconHTA // | |
19 | // // | |
20 | // HMPID class to perfom pattern recognition based on Hough transfrom // | |
21 | // for single chamber // | |
22 | ////////////////////////////////////////////////////////////////////////// | |
23 | ||
24 | #include "AliHMPIDReconHTA.h"//class header | |
25 | #include "AliHMPIDCluster.h" //CkovHiddenTrk() | |
26 | #include "AliHMPIDRecon.h" //FunMinPhot() | |
27 | #include <TFile.h> //Database() | |
28 | #include <TMinuit.h> //FitFree() | |
29 | #include <TClonesArray.h> //CkovHiddenTrk() | |
30 | #include <AliESDtrack.h> //CkovHiddenTrk() | |
31 | #include <TH2F.h> //InitDatabase() | |
32 | #include <TGraph.h> //ShapeModel() | |
33 | #include <TSpline.h> //ShapeModel() | |
34 | #include <TCanvas.h> //ShapeModel() | |
35 | #include "TStopwatch.h" // | |
36 | ||
37 | Int_t AliHMPIDReconHTA::fgDB[500][150]={{75000*0}}; | |
38 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
39 | AliHMPIDReconHTA::AliHMPIDReconHTA(): | |
40 | TNamed("RichRec","RichPat"), | |
41 | fMipX(-999), | |
42 | fMipY(-999), | |
43 | fMipQ(-999), | |
44 | fRadX(-999), | |
45 | fRadY(-999), | |
46 | fIdxMip(0), | |
47 | fNClu(0), | |
48 | fXClu(0), | |
49 | fYClu(0), | |
50 | fPhiPhot(0), | |
51 | fThetaPhot(0), | |
52 | fClCk(0), | |
53 | fThTrkIn(-999), | |
54 | fPhTrkIn(-999), | |
55 | fThTrkFit(-999), | |
56 | fPhTrkFit(-999), | |
57 | fCkovFit(-999), | |
58 | fNCluFit(0), | |
59 | fCkovSig2(0), | |
60 | fFitStatus(0), | |
61 | fParam(AliHMPIDParam::Instance()) | |
62 | { | |
63 | //.. | |
64 | //hidden algorithm | |
65 | //.. | |
66 | fParam->SetRefIdx(fParam->MeanIdxRad()); // initialization of ref index to a default one | |
67 | InitDatabase(); | |
68 | } | |
69 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
70 | AliHMPIDReconHTA::~AliHMPIDReconHTA() | |
71 | { | |
72 | DeleteVars(); | |
73 | } | |
74 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
75 | void AliHMPIDReconHTA::InitVars(Int_t n) | |
76 | { | |
77 | //.. | |
78 | //Init some variables | |
79 | //.. | |
80 | fXClu = new Double_t[n]; | |
81 | fYClu = new Double_t[n]; | |
82 | fPhiPhot = new Double_t[n]; | |
83 | fThetaPhot = new Double_t[n]; | |
84 | fClCk = new Bool_t[n]; | |
85 | for(Int_t i=0;i<n;i++) fClCk[i] = kTRUE; | |
86 | // | |
87 | } | |
88 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
89 | void AliHMPIDReconHTA::DeleteVars()const | |
90 | { | |
91 | //.. | |
92 | //Delete variables | |
93 | //.. | |
94 | if(fXClu) delete [] fXClu; | |
95 | if(fYClu) delete [] fYClu; | |
96 | if(fPhiPhot) delete [] fPhiPhot; | |
97 | if(fThetaPhot) delete [] fThetaPhot; | |
98 | if(fClCk) delete [] fClCk; | |
99 | } | |
100 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
101 | Bool_t AliHMPIDReconHTA::CkovHiddenTrk(AliESDtrack *pTrk,TClonesArray *pCluLst,Int_t index, Double_t nmean) | |
102 | { | |
103 | // Pattern recognition method without any infos from tracking:HTA (Hidden Track Algorithm)... | |
104 | // The method finds in the chmuber the cluster with the highest charge | |
105 | // compatibile with a MIP, then the strategy is applied | |
106 | // Arguments: pTrk - pointer to ESD track | |
107 | // pCluLs - list of clusters for a given chamber | |
108 | // pNmean - pointer to ref. index | |
109 | // pQthre - pointer to qthre | |
110 | // Returns: - 0=ok,1=not fitted | |
111 | ||
112 | AliHMPIDParam *pParam = AliHMPIDParam::Instance(); | |
113 | ||
114 | if(!CluPreFilter(pCluLst)) return kFALSE; | |
115 | ||
116 | Int_t nCh=0; | |
117 | Int_t sizeClu=0; | |
118 | ||
119 | fNClu = pCluLst->GetEntriesFast(); | |
120 | ||
121 | for (Int_t iClu=0;iClu<fNClu;iClu++){ //clusters loop | |
122 | AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluLst->UncheckedAt(iClu); //get pointer to current cluster | |
123 | fXClu[iClu] = pClu->X();fYClu[iClu] = pClu->Y(); //store x,y for fitting procedure | |
124 | fClCk[iClu] = kTRUE; //all cluster are accepted at this stage to be reconstructed | |
125 | ||
126 | if(iClu == index) { | |
127 | ||
128 | fMipX = pClu->X(); | |
129 | fMipY = pClu->Y(); | |
130 | fMipQ = pClu->Q(); | |
131 | sizeClu = pClu->Size(); | |
132 | nCh = pClu->Ch(); | |
133 | fClCk[index] = kFALSE; | |
134 | fIdxMip = index; | |
135 | AliDebug(1,Form(" MIP n. %i x %f y %f Q %f",iClu,pClu->X(),pClu->Y(),pClu->Q())); | |
136 | } | |
137 | }//clusters loop | |
138 | ||
139 | pParam->SetRefIdx(nmean); | |
140 | ||
141 | // | |
142 | Float_t xra,yra,th,ph; pTrk->GetHMPIDtrk(xra,yra,th,ph); | |
143 | AliDebug(1,Form(" simulated phiTRK %6.2f thetaTRK %6.2f",ph*TMath::RadToDeg(),th*TMath::RadToDeg())); | |
144 | // | |
145 | ||
146 | if(!DoRecHiddenTrk()) { | |
147 | pTrk->SetHMPIDsignal(pParam->kNoPhotAccept); | |
148 | return kFALSE; | |
149 | } //Do track and ring reconstruction,if problems returns 1 | |
150 | AliDebug(1,Form(" fitted phi %6.2f ",fPhTrkFit*TMath::RadToDeg())); | |
151 | ||
152 | pTrk->SetHMPIDtrk(fRadX,fRadY,fThTrkFit,fPhTrkFit); //store track intersection info | |
153 | pTrk->SetHMPIDmip(fMipX,fMipY,(Int_t)fMipQ,NCluFit()); //store mip info + n. phots of the ring | |
154 | pTrk->SetHMPIDcluIdx(nCh,fIdxMip+1000*sizeClu); //set cham number, index of cluster + cluster size | |
155 | pTrk->SetHMPIDsignal(fCkovFit); //find best Theta ckov for ring i.e. track | |
156 | pTrk->SetHMPIDchi2(fCkovSig2); //errors squared | |
157 | AliDebug(1,Form(" n clusters tot %i fitted to ring %i",fNClu,NCluFit())); | |
158 | for(Int_t i=0;i<fNClu;i++) { | |
159 | AliDebug(1,Form(" n.%3i ThetaCer %8.3f PhiCer %8.3f check %i",i,fThetaPhot[i],fPhiPhot[i],fClCk[i])); | |
160 | } | |
161 | AliDebug(1,Form("CkovHiddenTrk: thetaC %f th %f ph %f",fCkovFit,fThTrkFit*TMath::RadToDeg(),fPhTrkFit*TMath::RadToDeg())); | |
162 | ||
163 | return kTRUE; | |
164 | ||
165 | }//CkovHiddenTrk() | |
166 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
167 | Bool_t AliHMPIDReconHTA::DoRecHiddenTrk() | |
168 | { | |
169 | // Pattern recognition method without any infos from tracking... | |
170 | // First a preclustering filter to avoid part of the noise | |
171 | // Then only ellipsed-rings are fitted (no possibility, | |
172 | // for the moment, to reconstruct very inclined tracks) | |
173 | // Finally a fitting with (th,ph) free, starting by very close values | |
174 | // previously evaluated. | |
175 | // Arguments: none | |
176 | // Returns: none | |
177 | Double_t thTrkRec,phiTrkRec,thetaCRec; | |
178 | ||
179 | if(!FindShape(thTrkRec,phiTrkRec,thetaCRec)) { | |
180 | AliDebug(1,Form(" FindShape failed...!")); | |
181 | return kFALSE; | |
182 | } | |
183 | AliDebug(1,Form(" FindShape accepted...!")); | |
184 | ||
185 | if(!FitRing(thTrkRec,phiTrkRec)) { | |
186 | AliDebug(1,Form(" FitRing failed...!")); | |
187 | return kFALSE; | |
188 | } | |
189 | AliDebug(1,Form(" FitRing accepted...!")); | |
190 | ||
191 | if(!UniformDistrib()) { | |
192 | AliDebug(1,Form(" UniformDistrib failed...!")); | |
193 | return kFALSE; | |
194 | } | |
195 | AliDebug(1,Form(" UniformDistrib accepted...!")); | |
196 | ||
197 | return kTRUE; | |
198 | }//DoRecHiddenTrk() | |
199 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
200 | Bool_t AliHMPIDReconHTA::CluPreFilter(TClonesArray *pCluLst) | |
201 | { | |
202 | // Pre-filter of bkg clusters | |
203 | // Arguments: pSluLst - List of the clusters for a given chamber | |
204 | // Returns: status - TRUE if filtering leaves enough photons, FALSE if not | |
205 | // | |
206 | Int_t nClusTot = pCluLst->GetEntriesFast(); | |
207 | if(nClusTot<4||nClusTot>100) { | |
208 | return kFALSE; | |
209 | } else { | |
210 | InitVars(nClusTot); | |
211 | return kTRUE; | |
212 | } | |
213 | } | |
214 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
215 | Bool_t AliHMPIDReconHTA::FindShape(Double_t &thTrkRec,Double_t &phiTrkRec,Double_t &thetaCRec) | |
216 | { | |
217 | // Finds the estimates for phi and theta of the track and the ThetaCerenkov | |
218 | // by using a database of the shapes of the rings | |
219 | // Arguments: none | |
220 | // Returns: thTrkRec - estimate of theta track | |
221 | // phiTrkRec - estimate of phi track | |
222 | // thetaCRec - estimate of ThetaCerenkov | |
223 | // status - TRUE if a good solution is found, FALSE if not | |
224 | ||
225 | Double_t phiphot[1000]; | |
226 | Double_t dist[1000]; | |
227 | Int_t indphi[1000]; | |
228 | ||
229 | Bool_t status; | |
230 | ||
231 | if(fNClu>1000) return kFALSE; // too many clusters.... | |
232 | ||
233 | // Sort in phi angle... | |
234 | for(Int_t i=0;i<fNClu;i++) { | |
235 | if(!fClCk[i]) { | |
236 | AliDebug(1,Form(" n.%3i xMIP %8.3f yMIP %8.3f check %i",i,fMipX,fMipY,fClCk[i])); | |
237 | phiphot[i] = 999.; | |
238 | dist[i] = 999.; | |
239 | continue; | |
240 | } | |
241 | phiphot[i] = (TMath::ATan2(fMipY-fYClu[i],fMipX-fXClu[i])+TMath::Pi())*TMath::RadToDeg(); | |
242 | dist[i]=TMath::Sqrt((fMipX-fXClu[i])*(fMipX-fXClu[i])+(fMipY-fYClu[i])*(fMipY-fYClu[i])); | |
243 | AliDebug(1,Form(" n.%3i phiphot %8.3f dist %8.3f check %i",i,phiphot[i],dist[i],fClCk[i])); | |
244 | } | |
245 | ||
246 | TMath::Sort(fNClu,phiphot,indphi,kFALSE); | |
247 | ||
248 | // Purify with a truncated mean; | |
249 | Int_t np=0; | |
250 | Double_t dMean = 0; | |
251 | Double_t dMean2 = 0; | |
252 | for(Int_t i=0;i<fNClu;i++) { | |
253 | if(!fClCk[indphi[i]]) continue; // Check if a good photon candidate or not | |
254 | dMean +=dist[indphi[i]]; | |
255 | dMean2+=dist[indphi[i]]*dist[indphi[i]]; | |
256 | np++; | |
257 | } | |
258 | ||
259 | if(np>0){ | |
260 | dMean /=(Double_t)np; | |
261 | dMean2 /=(Double_t)np;} | |
262 | Double_t rms = TMath::Sqrt(dMean2 - dMean*dMean); | |
263 | ||
264 | for(Int_t i=0;i<fNClu;i++) { | |
265 | if(!fClCk[indphi[i]]) continue; // Check if a good photon candidate or not | |
266 | if(TMath::Abs(dMean-dist[indphi[i]]) > 1.5*rms) { | |
267 | fClCk[indphi[i]] = kFALSE; | |
268 | continue; | |
269 | } | |
270 | } | |
271 | ||
272 | AliDebug(1,"Purification of photons..."); | |
273 | // | |
274 | // purify vectors for good photon candidates | |
275 | // | |
276 | Int_t npeff=0; | |
277 | Double_t *phiphotP = new Double_t[fNClu+1]; | |
278 | Double_t *distP = new Double_t[fNClu+1]; | |
279 | for(Int_t i=0;i<fNClu;i++) { | |
280 | AliDebug(1,Form(" n. %3i phiphot %8.3f dist %8.3f check %i",i,phiphot[indphi[i]],dist[indphi[i]],fClCk[indphi[i]])); | |
281 | if(!fClCk[indphi[i]]) continue; // Check if a good photon candidate or not | |
282 | phiphotP[npeff] = phiphot[indphi[i]]; | |
283 | distP[npeff] = dist[indphi[i]]; | |
284 | npeff++; | |
285 | } | |
286 | ||
287 | if(npeff<3) { | |
288 | AliDebug(1,Form("FindShape failed: no enough photons = %i...",npeff)); | |
289 | delete [] phiphotP; | |
290 | delete [] distP; | |
291 | return kFALSE; | |
292 | } | |
293 | ||
294 | Double_t xA,xB; | |
295 | status = kFALSE; | |
296 | ||
297 | if(!ShapeModel(npeff,phiphotP,distP,xA,xB,phiTrkRec)) {AliDebug(1,Form("ShapeModel failed ")); return kFALSE;} | |
298 | ||
299 | // if(xA > 50 || xB > 15) {AliDebug(1,Form("xA and xB failed out of range")); return kFALSE;} | |
300 | ||
301 | Int_t binxDB,binyDB; | |
302 | Int_t compactDB=-1; | |
303 | ||
304 | if(xA > xB) { //geometrically not possible, try to recover on a mean values... | |
305 | ||
306 | FindBinDB(xA,xA,binxDB,binyDB); | |
307 | if(binxDB<0 || binyDB<0) {AliDebug(1,Form("bin < 0 ! failed ")); return kFALSE;} | |
308 | Int_t compactDB1 = CompactDB(binxDB,binyDB); | |
309 | FindBinDB(xB,xB,binxDB,binyDB); | |
310 | if(binxDB<0 || binyDB<0) {AliDebug(1,Form("bin < 0 ! failed ")); return kFALSE;} | |
311 | Int_t compactDB2 = CompactDB(binxDB,binyDB); | |
312 | Double_t thetaCRec1 = (Double_t)(compactDB1%1000); | |
313 | Double_t thetaCRec2 = (Double_t)(compactDB2%1000); | |
314 | Double_t thTrkRec1 = (Double_t)(compactDB1/1000); | |
315 | Double_t thTrkRec2 = (Double_t)(compactDB2/1000); | |
316 | thetaCRec = 0.5*(thetaCRec1+thetaCRec2); | |
317 | thTrkRec = 0.5*( thTrkRec1+ thTrkRec2); | |
318 | ||
319 | } else { | |
320 | ||
321 | FindBinDB(xA,xB,binxDB,binyDB); | |
322 | if(binxDB<0 || binyDB<0) {AliDebug(1,Form("bin < 0 ! failed ")); return kFALSE;} | |
323 | ||
324 | compactDB = CompactDB(binxDB,binyDB); | |
325 | ||
326 | if(compactDB<0) {AliDebug(1,Form("compact< 0! failed ")); return kFALSE;} | |
327 | // | |
328 | // | |
329 | thetaCRec = (Double_t)(compactDB%1000); | |
330 | thTrkRec = (Double_t)(compactDB/1000); | |
331 | ||
332 | } | |
333 | ||
334 | AliDebug(1,Form(" CompactDB %i thTrkRec %8.3f thetaCRec %8.3f ",compactDB,thTrkRec,thetaCRec)); | |
335 | ||
336 | phiTrkRec *= TMath::DegToRad(); | |
337 | thTrkRec *= TMath::DegToRad(); | |
338 | thetaCRec *= TMath::DegToRad(); | |
339 | ||
340 | status = kTRUE; | |
341 | ||
342 | delete [] phiphotP; | |
343 | delete [] distP; | |
344 | ||
345 | return status; | |
346 | } | |
347 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
348 | Bool_t AliHMPIDReconHTA::ShapeModel(Int_t np,Double_t *phiphot,Double_t *dist,Double_t &xA,Double_t &xB,Double_t &phiStart) | |
349 | { | |
350 | // Find a Spline curve to define dist. vs. phi angle | |
351 | // in order to estimate the phi of the track | |
352 | // Arguments: np - # points corresponding to # photon candidates | |
353 | // dist - distance of each photon from MIP | |
354 | // phiphot - phi of the photon in the DRS | |
355 | // Returns: xA - min. distance from MIP | |
356 | // xB - dist. from mip perpedicular to the major axis | |
357 | // phiStart- estimate of the track phi | |
358 | ||
359 | TGraph *phigr = new TGraph(np,phiphot,dist); | |
360 | phiStart = FindSimmPhi(); | |
361 | ||
362 | Double_t phiStart1 = phiStart; | |
363 | if(phiStart1 > 360) phiStart1 -= 360; | |
364 | Double_t phiStart2 = phiStart+90; | |
365 | if(phiStart2 > 360) phiStart2 -= 360; | |
366 | xA = phigr->Eval(phiStart1); | |
367 | xB = phigr->Eval(phiStart2); | |
368 | //--- | |
369 | AliDebug(1,Form("phiStart %f phiStart1 %f phiStart2 %f ",phiStart,phiStart1,phiStart2)); | |
370 | AliDebug(1,Form("xA %f xB %f",xA,xB)); | |
371 | ||
372 | phiStart += 180; | |
373 | if(phiStart>360) phiStart-=360; | |
374 | ||
375 | return kTRUE; | |
376 | } | |
377 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
378 | Double_t AliHMPIDReconHTA::VertParab(Double_t x1,Double_t y1,Double_t x2, Double_t y2, Double_t x3, Double_t y3)const | |
379 | { | |
380 | // It uses parabola from 3 points to evaluate the x-coord of the parab | |
381 | // Arguments: xi,yi - points | |
382 | // Returns: x-coord of the vertex | |
383 | ||
384 | Double_t a = ((x1-x3)*(y1-y2)-(x1-x2)*(y1-y3))/((x1*x1-x2*x2)*(x1-x3)-(x1*x1-x3*x3)*(x1-x2)); | |
385 | Double_t b = (y1-y2 - a*(x1*x1-x2*x2))/(x1-x2); | |
386 | // Double_t c = y1 - a*x1*x1-b*x1; | |
387 | return -0.5*b/a; | |
388 | } | |
389 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
390 | Bool_t AliHMPIDReconHTA::FitRing(Double_t thTrkRec,Double_t phiTrkRec) | |
391 | { | |
392 | Double_t th = thTrkRec; | |
393 | Double_t ph = phiTrkRec; | |
394 | ||
395 | FitFree(th,ph); | |
396 | while(FitStatus()) { | |
397 | th = fThTrkFit; | |
398 | ph = fPhTrkFit; | |
399 | FitFree(th,ph); | |
400 | } | |
401 | return kTRUE; | |
402 | } | |
403 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
404 | Bool_t AliHMPIDReconHTA::FitFree(Double_t thTrkRec,Double_t phiTrkRec) | |
405 | { | |
406 | // Fit performed by minimizing RMS/sqrt(n) of the | |
407 | // photons reconstructed. First phi is fixed and theta | |
408 | // is fouond, then (th,ph) of the track | |
409 | // as free parameters | |
410 | // Arguments: PhiRec phi of the track | |
411 | // Returns: none | |
412 | ||
413 | TMinuit *pMinuit = new TMinuit(2); | |
414 | pMinuit->mncler(); | |
415 | gMinuit->SetObjectFit((TObject*)this); gMinuit->SetFCN(AliHMPIDReconHTA::FunMinPhot); //set fit function | |
416 | Double_t aArg=-1,parStep,parLow,parHigh; Int_t iErrFlg; //tmp vars for TMinuit | |
417 | Double_t d1,d2,d3; | |
418 | TString sName; | |
419 | Double_t th,ph; | |
420 | ||
421 | pMinuit->mnexcm("SET PRI",&aArg,1,iErrFlg); //suspend all printout from TMinuit | |
422 | pMinuit->mnexcm("SET NOW",&aArg,0,iErrFlg); | |
423 | ||
424 | if(thTrkRec==0) thTrkRec = 3.*TMath::DegToRad(); // not to start from the edge... | |
425 | ||
426 | AliDebug(1,Form(" Minimization STARTED with phiTRK %6.2f thetaTRK %6.2f",phiTrkRec,thTrkRec)); | |
427 | ||
428 | pMinuit->mnparm(0," thTrk ",thTrkRec ,parStep=0.01,parLow=0,parHigh=TMath::PiOver4(),iErrFlg); | |
429 | pMinuit->mnparm(1," phiTrk ",phiTrkRec,parStep=0.01,parLow=0,parHigh=TMath::TwoPi(),iErrFlg); | |
430 | ||
431 | pMinuit->FixParameter(1); | |
432 | pMinuit->mnexcm("SIMPLEX" ,&aArg,0,iErrFlg); | |
433 | pMinuit->mnexcm("MIGRAD" ,&aArg,0,iErrFlg); | |
434 | pMinuit->Release(1); | |
435 | pMinuit->mnexcm("MIGRAD" ,&aArg,0,iErrFlg); | |
436 | ||
437 | pMinuit->mnpout(0,sName,th,d1,d2,d3,iErrFlg); | |
438 | pMinuit->mnpout(1,sName,ph,d1,d2,d3,iErrFlg); | |
439 | ||
440 | Double_t f,par[2]; | |
441 | Double_t *grad=0x0; | |
442 | par[0] = th;par[1] = ph; | |
443 | pMinuit->Eval(2,grad,f,par,3); | |
444 | ||
445 | SetTrkFit(th,ph); | |
446 | return kTRUE; | |
447 | } | |
448 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
449 | void AliHMPIDReconHTA::FunMinPhot(Int_t &/* */,Double_t* /* */,Double_t &f,Double_t *par,Int_t iflag) | |
450 | { | |
451 | // Minimization function to find best track and thetaC parameters | |
452 | // Arguments: f = function value to minimize | |
453 | // par = list of parameter to find | |
454 | // iflag = flag status. See Minuit instructions | |
455 | // Returns: none | |
456 | // | |
457 | // Note: it is necessary to call an instance of AlihMPIDParam. Not possible to use fParam | |
458 | // because of the static instantiation of the function in Minuit | |
459 | ||
460 | AliHMPIDParam *pParam=AliHMPIDParam::Instance(); | |
461 | AliHMPIDReconHTA *pRecHTA=(AliHMPIDReconHTA*)gMinuit->GetObjectFit(); | |
462 | AliHMPIDRecon pRec; | |
463 | Double_t sizeCh = 0.5*pParam->RadThick()+pParam->WinThick()+pParam->GapThick(); | |
464 | Double_t thTrk = par[0]; | |
465 | Double_t phTrk = par[1]; | |
466 | Double_t xrad = pRecHTA->MipX() - sizeCh*TMath::Tan(thTrk)*TMath::Cos(phTrk); | |
467 | Double_t yrad = pRecHTA->MipY() - sizeCh*TMath::Tan(thTrk)*TMath::Sin(phTrk); | |
468 | pRecHTA->SetRadXY(xrad,yrad); | |
469 | pRec.SetTrack(xrad,yrad,thTrk,phTrk); | |
470 | ||
471 | Double_t meanCkov =0; | |
472 | Double_t meanCkov2=0; | |
473 | Double_t thetaCer,phiCer; | |
474 | Int_t nClAcc = 0; | |
475 | Int_t nClTot=pRecHTA->NClu(); | |
476 | ||
477 | for(Int_t i=0;i<nClTot;i++) { | |
478 | ||
479 | if(pRecHTA->IdxMip() == i) { | |
480 | pRecHTA->SetPhotAngles(i,999.,999.); | |
481 | continue; | |
482 | } | |
483 | ||
484 | if(!(pRecHTA->ClCk(i))) continue; | |
485 | ||
486 | Bool_t status = pRec.FindPhotCkov(pRecHTA->XClu(i),pRecHTA->YClu(i),thetaCer,phiCer); | |
487 | if(!status) { | |
488 | pRecHTA->SetPhotAngles(i,999.,999.); | |
489 | continue; | |
490 | } | |
491 | pRecHTA->SetPhotAngles(i,thetaCer,phiCer); | |
492 | meanCkov += thetaCer; | |
493 | meanCkov2 += thetaCer*thetaCer; | |
494 | nClAcc++; | |
495 | } | |
496 | ||
497 | if(nClAcc==0) {f=999;return;} | |
498 | meanCkov /=(Double_t)nClAcc; | |
499 | meanCkov2 /=(Double_t)nClAcc; | |
500 | Double_t rms = TMath::Sqrt(TMath::Abs(meanCkov2 - meanCkov*meanCkov)); | |
501 | f = rms/TMath::Sqrt((Double_t)nClAcc); | |
502 | ||
503 | if(iflag==3) { | |
504 | Int_t nClAccStep1 = nClAcc; | |
505 | nClAcc = 0; | |
506 | Double_t meanCkov1=0; | |
507 | Double_t meanCkov3=0; | |
508 | for(Int_t i=0;i<nClTot;i++) { | |
509 | ||
510 | if(!(pRecHTA->ClCk(i))) continue; | |
511 | thetaCer = pRecHTA->PhotTheta(i); | |
512 | if(TMath::Abs(thetaCer-meanCkov)<2*rms) { | |
513 | meanCkov1 += thetaCer; | |
514 | meanCkov3 += thetaCer*thetaCer; | |
515 | nClAcc++; | |
516 | } else pRecHTA->SetClCk(i,kFALSE); | |
517 | } | |
518 | ||
519 | if(nClAcc<3) { | |
520 | pRecHTA->SetFitStatus(kFALSE); | |
521 | pRecHTA->SetCkovFit(meanCkov); | |
522 | pRecHTA->SetCkovSig2(rms*rms); | |
523 | pRecHTA->SetNCluFit(nClAccStep1); | |
524 | return; | |
525 | } | |
526 | ||
527 | meanCkov1/=nClAcc; | |
528 | Double_t rms2 = (meanCkov3 - meanCkov*meanCkov*nClAcc)/nClAcc; | |
529 | ||
530 | // get a logger instance | |
531 | // what for?? | |
532 | //AliLog::GetRootLogger(); | |
533 | ||
534 | if(nClAcc!=nClAccStep1) pRecHTA->SetFitStatus(kTRUE); else pRecHTA->SetFitStatus(kFALSE); | |
535 | ||
536 | pRecHTA->SetCkovFit(meanCkov1); | |
537 | pRecHTA->SetCkovSig2(rms2); | |
538 | pRecHTA->SetNCluFit(nClAcc); | |
539 | } | |
540 | }//FunMinPhot() | |
541 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
542 | void AliHMPIDReconHTA::InitDatabase() | |
543 | { | |
544 | // Construction a database of ring shapes on fly | |
545 | // Arguments: none | |
546 | // Returns : none | |
547 | // N.B. fgDB is the distance with x-min from MIP | |
548 | // y-dist from the ring of the MIP perpendicular to major axis | |
549 | // The content is the packed info of track theta and thetaC in degrees | |
550 | // thetaC+1000*thTrk | |
551 | // | |
552 | // TFile *pout = new TFile("./database.root","recreate"); | |
553 | ||
554 | static Bool_t isDone = kFALSE; | |
555 | ||
556 | TStopwatch timer; | |
557 | ||
558 | if(isDone) { | |
559 | return; | |
560 | } | |
561 | ||
562 | if(!isDone) { | |
563 | timer.Start(); | |
564 | } | |
565 | ||
566 | AliInfo(Form("database HTA is being built.Please, wait...")); | |
567 | // | |
568 | Double_t x[3]={0,0,0},y[3]; | |
569 | ||
570 | AliHMPIDRecon rec; | |
571 | ||
572 | if(!fParam) fParam=AliHMPIDParam::Instance(); | |
573 | Double_t thetaMax = TMath::ACos(1./fParam->MeanIdxRad()); | |
574 | Double_t thTrkMax = 1./TMath::ASin(fParam->MeanIdxRad()); | |
575 | ||
576 | Int_t nstepx = 1000; | |
577 | Int_t nstepy = 1000; | |
578 | ||
579 | // | |
580 | Double_t xrad = 0; | |
581 | Double_t yrad = 0; | |
582 | Double_t phTrk = 0; | |
583 | ||
584 | for(Int_t i=0;i<nstepx;i++) { //loop on thetaC | |
585 | for(Int_t j=0;j<nstepy;j++) { //loop on theta particle | |
586 | Double_t thetaC = thetaMax/nstepx*((Double_t)i+0.5); | |
587 | Double_t thTrk = thTrkMax/nstepy*((Double_t)j+0.5); | |
588 | // | |
589 | //mip position | |
590 | // | |
591 | Double_t sizeCh = 0.5*fParam->RadThick()+fParam->WinThick()+fParam->GapThick(); | |
592 | Double_t xmip = xrad + sizeCh*TMath::Tan(thTrk)*TMath::Cos(phTrk); | |
593 | Double_t ymip = yrad + sizeCh*TMath::Tan(thTrk)*TMath::Sin(phTrk); | |
594 | ||
595 | Double_t dist1,dist2; | |
596 | // | |
597 | //first point at phi=0 | |
598 | // | |
599 | rec.SetTrack(xrad,yrad,thTrk,phTrk); | |
600 | TVector2 pos; | |
601 | pos=rec.TracePhot(thetaC,0); | |
602 | ||
603 | if(pos.X()==-999) { | |
604 | dist1 = 0; //open ring...only the distance btw mip and point at 180 will be considered | |
605 | } else { | |
606 | x[0] = pos.X(); y[0] = pos.Y(); | |
607 | dist1 = TMath::Sqrt((x[0]-xmip)*(x[0]-xmip)+(y[0]-ymip)*(y[0]-ymip)); | |
608 | } | |
609 | // | |
610 | //second point at phi=180 | |
611 | // | |
612 | rec.SetTrack(xrad,yrad,thTrk,phTrk); | |
613 | pos=rec.TracePhot(thetaC,TMath::Pi()); | |
614 | ||
615 | if(pos.X()==-999) {AliDebug(1,Form("it should not happens!Bye"));return;} | |
616 | x[1] = pos.X(); y[1] = pos.Y(); | |
617 | if((x[1]-xmip)*(x[0]-xmip)>0) continue; // to avoid circles out mips (for very low ThetaC) | |
618 | dist2 = TMath::Sqrt((x[1]-xmip)*(x[1]-xmip)+(y[1]-ymip)*(y[1]-ymip)); | |
619 | ||
620 | // Double_t distA = dist1+dist2; | |
621 | Double_t distA = dist2; // only the minimum: problem of acceptance | |
622 | // | |
623 | //second point at phi=90 | |
624 | // | |
625 | rec.SetTrack(xrad,yrad,thTrk,phTrk); | |
626 | pos=rec.TracePhot(thetaC,TMath::PiOver2()); | |
627 | ||
628 | if(pos.X()==-999) continue; | |
629 | x[2] = pos.X(); y[2] = pos.Y(); | |
630 | Double_t distB = TMath::Sqrt((x[2]-xmip)*(x[2]-xmip)+(y[2]-ymip)*(y[2]-ymip)); | |
631 | // compact the infos... | |
632 | Int_t compact = (Int_t)(thetaC*TMath::RadToDeg())+1000*(Int_t)(thTrk*TMath::RadToDeg()); | |
633 | Int_t binxDB,binyDB; | |
634 | FindBinDB(distA,distB,binxDB,binyDB); | |
635 | if(fgDB[binxDB][binyDB]==0) fgDB[binxDB][binyDB] = compact; | |
636 | } | |
637 | } | |
638 | ||
639 | FillZeroChan(); | |
640 | ||
641 | if(!isDone) { | |
642 | timer.Stop(); | |
643 | Double_t nSecs = timer.CpuTime(); | |
644 | AliInfo(Form("database HTA successfully open in %3.1f sec.(CPU). Reconstruction is started.",nSecs)); | |
645 | isDone = kTRUE; | |
646 | } | |
647 | ||
648 | // pout->Write(); | |
649 | // pout->Close(); | |
650 | ||
651 | }//InitDatabase() | |
652 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
653 | void AliHMPIDReconHTA::FillZeroChan()const | |
654 | { | |
655 | //If fills eventually channel without entries | |
656 | //inthe histo "database" jyst interpolating the neighboring cells | |
657 | // Arguments: histogram pointer of the database | |
658 | // Returns: none | |
659 | // | |
660 | const Int_t nxDB = 500; | |
661 | const Int_t nyDB = 150; | |
662 | ||
663 | for(Int_t i = 0;i<nxDB;i++) { | |
664 | for(Int_t j = 0;j<nyDB;j++) { | |
665 | if(fgDB[i][j] == 0) { | |
666 | fgDB[i][j] = -1; | |
667 | Int_t nXmin = i-1; Int_t nXmax=i+1; | |
668 | Int_t nYmin = j-1; Int_t nYmax=j+1; | |
669 | Int_t nc = 0; | |
670 | Double_t meanC =0; | |
671 | Double_t meanTrk =0; | |
672 | for(Int_t ix=nXmin;ix<=nXmax;ix++) { | |
673 | if(ix<0||ix>=nxDB) continue; | |
674 | for(Int_t iy=nYmin;iy<=nYmax;iy++) { | |
675 | if(iy<0||iy>=nyDB) continue; | |
676 | meanC += (Int_t)(fgDB[ix][iy]%1000); | |
677 | meanTrk+= (Int_t)(fgDB[ix][iy]/1000); | |
678 | nc++; | |
679 | } | |
680 | meanC/=nc; meanTrk/=nc; | |
681 | Int_t compact = (Int_t)meanC+1000*(Int_t)meanTrk; | |
682 | if(compact>0)fgDB[i][j] = compact; | |
683 | } | |
684 | } | |
685 | } | |
686 | } | |
687 | }//FillZeroChan() | |
688 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
689 | Int_t AliHMPIDReconHTA::r2(Double_t *coef, Double_t &x1, Double_t &x2) | |
690 | { | |
691 | //2nd deg. equation | |
692 | //solution | |
693 | // Arguments: coef 2 1 0: ax^2+bx+c=0 | |
694 | // Returns: n. of solutions | |
695 | // x1= 1st sol | |
696 | // x2= 2nd sol | |
697 | Double_t a,b,c; | |
698 | a = coef[2]; | |
699 | b = coef[1]; | |
700 | c = coef[0]; | |
701 | Double_t delta = b*b-4*a*c; | |
702 | if(delta<0) {return 0;} | |
703 | if(delta==0) { | |
704 | x1=x2=-b/(2*a); | |
705 | return 1; | |
706 | } | |
707 | if(a==0) { | |
708 | x1 = -c/b; | |
709 | return 1; | |
710 | } | |
711 | // delta>0 | |
712 | x1 = (-b+TMath::Sqrt(delta))/(2*a); | |
713 | x2 = (-b-TMath::Sqrt(delta))/(2*a); | |
714 | return 2; | |
715 | }//r2() | |
716 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
717 | ||
718 | Double_t AliHMPIDReconHTA::FindSimmPhi() | |
719 | { | |
720 | //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
721 | // Reconstruction of phiTRK angle with two methods (in switching) | |
722 | // | |
723 | // - least square method (for closed rings) | |
724 | // - by minimum distance mip-photon (for open rings) | |
725 | ||
726 | Float_t coeff1ord=0; Float_t coeff2ord=0; Float_t coeff0ord=0; | |
727 | Float_t xrotsumm =0; Float_t yrotsumm =0; Float_t xx =0; | |
728 | Float_t yy =0; Float_t xy =0; | |
729 | Double_t xmin=0; | |
730 | Double_t ymin=0; | |
731 | ||
732 | Int_t np=0; | |
733 | ||
734 | Double_t distMin = 999.; | |
735 | ||
736 | for(Int_t i=0;i<fNClu;i++) { | |
737 | if(!fClCk[i]) continue; | |
738 | np++; | |
739 | xrotsumm+=fXClu[i]; // summ xi | |
740 | yrotsumm+=fYClu[i]; // summ yi | |
741 | xx+=fXClu[i]*fXClu[i]; // summ xixi | |
742 | yy+=fYClu[i]*fYClu[i]; // summ yiyi | |
743 | xy+=fXClu[i]*fYClu[i]; // summ yixi | |
744 | Double_t dist2= (fXClu[i]-fMipX)*(fXClu[i]-fMipX)+(fYClu[i]-fMipY)*(fYClu[i]-fMipY); | |
745 | if(dist2<distMin) { | |
746 | distMin = dist2; | |
747 | xmin = fXClu[i]; | |
748 | ymin = fYClu[i]; | |
749 | } | |
750 | } | |
751 | ||
752 | Double_t AngM = TMath::ATan2(ymin-fMipY,(xmin-fMipX))*TMath::RadToDeg(); | |
753 | if (AngM<0) AngM+=360; | |
754 | ||
755 | AliDebug(1,Form(" Simple angle prediction with MIN phi = %f",AngM)); | |
756 | ||
757 | //_____calc. met min quadr using effective distance _________________________________________________ | |
758 | ||
759 | if(np>0){ | |
760 | coeff2ord = xy-xrotsumm*yrotsumm/np; | |
761 | coeff1ord = yrotsumm*yrotsumm/np - xrotsumm*xrotsumm/np - yy + xx; | |
762 | } | |
763 | coeff0ord = -coeff2ord; | |
764 | ||
765 | AliDebug(1,Form(" a = %f b = %f c = %f",coeff2ord,coeff1ord,coeff0ord)); | |
766 | ||
767 | Double_t m1=0, m2=0; Double_t n1=0, n2=0; | |
768 | // c // b // a | |
769 | Double_t coeff[3]={coeff0ord,coeff1ord,coeff2ord}; | |
770 | ||
771 | r2(coeff,m1,m2); | |
772 | ||
773 | if(np>0){ | |
774 | n1=(yrotsumm-m1*xrotsumm)/np; | |
775 | n2=(yrotsumm-m2*xrotsumm)/np;} | |
776 | // 2 solutions................. | |
777 | ||
778 | // negative angles solved... | |
779 | ||
780 | Double_t d1 =(1/(m1*m1+1))*(yy+m1*m1*xx+np*n1*n1-2*m1*xy-2*n1*yrotsumm+2*m1*n1*xrotsumm); | |
781 | Double_t d2 =(1/(m2*m2+1))*(yy+m2*m2*xx+np*n2*n2-2*m2*xy-2*n2*yrotsumm+2*m2*n2*xrotsumm); | |
782 | ||
783 | AliDebug(1,Form(" predicted distance d1 %f for angle %6.2f d2 %f for angle %6.2f",d1,TMath::ATan(m1)*TMath::RadToDeg(), | |
784 | d2,TMath::ATan(m2)*TMath::RadToDeg())); | |
785 | Double_t mMin; | |
786 | if(d1 > d2) mMin = m2; else mMin = m1; | |
787 | ||
788 | Double_t phiTrk=0; | |
789 | // | |
790 | if(ymin < fMipY && xmin > fMipX) {phiTrk = TMath::ATan(mMin)*TMath::RadToDeg()+180;} | |
791 | if(ymin > fMipY && xmin < fMipX) {phiTrk = TMath::ATan(mMin)*TMath::RadToDeg()+360;} | |
792 | if(ymin > fMipY && xmin > fMipX) {phiTrk = TMath::ATan(mMin)*TMath::RadToDeg()+180;} | |
793 | if(ymin < fMipY && xmin < fMipX) {phiTrk = TMath::ATan(mMin)*TMath::RadToDeg();} | |
794 | if(ymin == fMipY && xmin > fMipX) {phiTrk = TMath::ATan(mMin)*TMath::RadToDeg()+180;} | |
795 | if(ymin == fMipY && xmin < fMipX) {phiTrk = TMath::ATan(mMin)*TMath::RadToDeg();} | |
796 | if(ymin < fMipY && xmin == fMipX) {phiTrk = 90;} | |
797 | if(ymin > fMipY && xmin == fMipX) {phiTrk = 270;} | |
798 | ||
799 | // ------------------------- choose the best----------------------- | |
800 | ||
801 | ||
802 | if( AngM-40 <= phiTrk && AngM+40 >= phiTrk) return phiTrk; else return AngM; | |
803 | } | |
804 | //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
805 | void AliHMPIDReconHTA::FindBinDB(Double_t x,Double_t y,Int_t &binX,Int_t &binY) | |
806 | { | |
807 | const Int_t nxDB = 500; | |
808 | const Int_t nyDB = 150; | |
809 | const Double_t xlowDB = 0; | |
810 | const Double_t xhigDB = 50; | |
811 | const Double_t ylowDB = 0; | |
812 | const Double_t yhigDB = 30; | |
813 | ||
814 | binX = -1; | |
815 | binY = -1; | |
816 | if(x<xlowDB && x>xhigDB && | |
817 | y<ylowDB && y>yhigDB) return; | |
818 | binX = Int_t((x-xlowDB)/(xhigDB-xlowDB)*nxDB); | |
819 | binY = Int_t((y-ylowDB)/(yhigDB-ylowDB)*nyDB); | |
820 | if(binX>=nxDB || binY>=nyDB) { | |
821 | binX = -1; | |
822 | binY = -1; | |
823 | } | |
824 | ||
825 | } | |
826 | //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | |
827 | Bool_t AliHMPIDReconHTA::UniformDistrib() | |
828 | { | |
829 | AliHMPIDParam *pParam=AliHMPIDParam::Instance(); | |
830 | AliHMPIDRecon pRec; | |
831 | ||
832 | Double_t sizeCh = 0.5*pParam->RadThick()+pParam->WinThick()+pParam->GapThick(); | |
833 | Double_t xrad = MipX() - sizeCh*TMath::Tan(fThTrkFit)*TMath::Cos(fPhTrkFit); | |
834 | Double_t yrad = MipY() - sizeCh*TMath::Tan(fThTrkFit)*TMath::Sin(fPhTrkFit); | |
835 | ||
836 | pRec.SetTrack(xrad,yrad,fThTrkFit,fPhTrkFit); | |
837 | ||
838 | Int_t npeff=0; | |
839 | Int_t nPhotPerBin = 4; | |
840 | for(Int_t i=0;i<fNClu;i++) { | |
841 | if(!ClCk(i)) continue; | |
842 | npeff++; | |
843 | } | |
844 | ||
845 | Int_t nPhiBins = npeff/nPhotPerBin+1; | |
846 | if(nPhiBins<=1) nPhiBins = 2; | |
847 | ||
848 | Double_t *iPhiBin; | |
849 | iPhiBin = new Double_t[nPhiBins]; | |
850 | ||
851 | for(Int_t i=0;i<nPhiBins;i++) iPhiBin[i] =0; | |
852 | ||
853 | for(Int_t i=0;i<fNClu;i++) { | |
854 | if(!ClCk(i)) continue; | |
855 | Double_t phiCer = PhotPhi(i); | |
856 | ||
857 | Double_t PhiProva = phiCer*TMath::RadToDeg(); | |
858 | if(PhiProva<0) PhiProva+= 360; | |
859 | Int_t index = (Int_t)((Float_t)nPhiBins*PhiProva/360.); | |
860 | iPhiBin[index]++; | |
861 | } | |
862 | ||
863 | Double_t chi2 = 0; | |
864 | for(Int_t i=0;i<nPhiBins;i++) { | |
865 | Double_t theo = (Double_t)npeff/(Double_t)nPhiBins; | |
866 | if(theo==0) continue; | |
867 | chi2+= (iPhiBin[i] - theo)*(iPhiBin[i] - theo)/theo; | |
868 | } | |
869 | ||
870 | delete [] iPhiBin; | |
871 | ||
872 | Double_t prob = TMath::Prob(chi2, nPhiBins-1); | |
873 | AliDebug(1,Form(" Probability for uniform distrib: %6f.3 %s",prob,(prob<0.05) ? "rejected" : "accepted")); | |
874 | if(prob<0.05) return kFALSE; | |
875 | return kTRUE; | |
876 | ||
877 | } | |
878 | //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |