1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercialf 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 **************************************************************************/
16 /* $Id: AliTRDtrackingResolution.cxx 27496 2008-07-22 08:35:45Z cblume $ */
18 ////////////////////////////////////////////////////////////////////////////
20 // TRD tracking resolution //
22 // The class performs resolution and residual studies
23 // of the TRD tracks for the following quantities :
24 // - spatial position (y, [z])
25 // - angular (phi) tracklet
26 // - momentum at the track level
28 // The class has to be used for regular detector performance checks using the official macros:
29 // - $ALICE_ROOT/TRD/qaRec/run.C
30 // - $ALICE_ROOT/TRD/qaRec/makeResults.C
32 // For stand alone usage please refer to the following example:
34 // gSystem->Load("libANALYSIS.so");
35 // gSystem->Load("libTRDqaRec.so");
36 // AliTRDtrackingResolution *res = new AliTRDtrackingResolution();
37 // //res->SetMCdata();
38 // //res->SetVerbose();
39 // //res->SetVisual();
40 // res->Load("TRD.TaskResolution.root");
41 // if(!res->PostProcess()) return;
42 // res->GetRefFigure(0);
46 // Alexandru Bercuci <A.Bercuci@gsi.de> //
47 // Markus Fasel <M.Fasel@gsi.de> //
49 ////////////////////////////////////////////////////////////////////////////
56 #include <TObjArray.h>
63 #include <TGraphErrors.h>
65 #include "TTreeStream.h"
66 #include "TGeoManager.h"
68 #include "AliAnalysisManager.h"
69 #include "AliTrackReference.h"
70 #include "AliTrackPointArray.h"
71 #include "AliCDBManager.h"
73 #include "AliTRDSimParam.h"
74 #include "AliTRDgeometry.h"
75 #include "AliTRDpadPlane.h"
76 #include "AliTRDcluster.h"
77 #include "AliTRDseedV1.h"
78 #include "AliTRDtrackV1.h"
79 #include "AliTRDtrackerV1.h"
80 #include "AliTRDReconstructor.h"
81 #include "AliTRDrecoParam.h"
83 #include "AliTRDtrackInfo/AliTRDclusterInfo.h"
84 #include "AliTRDtrackInfo/AliTRDtrackInfo.h"
85 #include "AliTRDtrackingResolution.h"
87 ClassImp(AliTRDtrackingResolution)
89 //________________________________________________________
90 AliTRDtrackingResolution::AliTRDtrackingResolution()
91 :AliTRDrecoTask("Resolution", "Tracking Resolution")
102 fReconstructor = new AliTRDReconstructor();
103 fReconstructor->SetRecoParam(AliTRDrecoParam::GetLowFluxParam());
104 fGeo = new AliTRDgeometry();
108 DefineOutput(1, TObjArray::Class()); // cluster2track
109 DefineOutput(2, TObjArray::Class()); // tracklet2track
110 DefineOutput(3, TObjArray::Class()); // cluster2mc
111 DefineOutput(4, TObjArray::Class()); // tracklet2mc
114 //________________________________________________________
115 AliTRDtrackingResolution::~AliTRDtrackingResolution()
117 if(fGraphS){fGraphS->Delete(); delete fGraphS;}
118 if(fGraphM){fGraphM->Delete(); delete fGraphM;}
120 delete fReconstructor;
121 if(gGeoManager) delete gGeoManager;
122 if(fCl){fCl->Delete(); delete fCl;}
123 if(fTrklt){fTrklt->Delete(); delete fTrklt;}
124 if(fMCcl){fMCcl->Delete(); delete fMCcl;}
125 if(fMCtrklt){fMCtrklt->Delete(); delete fMCtrklt;}
129 //________________________________________________________
130 void AliTRDtrackingResolution::CreateOutputObjects()
132 // spatial resolution
133 OpenFile(0, "RECREATE");
135 fContainer = Histos();
137 fCl = new TObjArray();
138 fCl->SetOwner(kTRUE);
139 fTrklt = new TObjArray();
140 fTrklt->SetOwner(kTRUE);
141 fMCcl = new TObjArray();
142 fMCcl->SetOwner(kTRUE);
143 fMCtrklt = new TObjArray();
144 fMCtrklt->SetOwner(kTRUE);
147 //________________________________________________________
148 void AliTRDtrackingResolution::Exec(Option_t *opt)
155 AliTRDrecoTask::Exec(opt);
160 PostData(4, fMCtrklt);
163 //________________________________________________________
164 TH1* AliTRDtrackingResolution::PlotCluster(const AliTRDtrackV1 *track)
166 if(track) fTrack = track;
168 AliWarning("No Track defined.");
172 if(!(h = ((TH2I*)fContainer->At(kCluster)))){
173 AliWarning("No output histogram defined.");
178 Float_t x0, y0, z0, dy, dydx, dzdx;
179 AliTRDseedV1 *fTracklet = 0x0;
180 for(Int_t ily=0; ily<AliTRDgeometry::kNlayer; ily++){
181 if(!(fTracklet = fTrack->GetTracklet(ily))) continue;
182 if(!fTracklet->IsOK()) continue;
183 x0 = fTracklet->GetX0();
185 // retrive the track angle with the chamber
186 y0 = fTracklet->GetYref(0);
187 z0 = fTracklet->GetZref(0);
188 dydx = fTracklet->GetYref(1);
189 dzdx = fTracklet->GetZref(1);
190 fTracklet->GetCovRef(cov);
191 Float_t tilt = fTracklet->GetTilt();
192 AliTRDcluster *c = 0x0;
193 fTracklet->ResetClusterIter(kFALSE);
194 while((c = fTracklet->PrevCluster())){
195 Float_t xc = c->GetX();
196 Float_t yc = c->GetY();
197 Float_t zc = c->GetZ();
198 Float_t dx = x0 - xc;
199 Float_t yt = y0 - dx*dydx;
200 Float_t zt = z0 - dx*dzdx;
201 yc -= tilt*(zc-zt); // tilt correction
204 h->Fill(dydx, dy/TMath::Sqrt(cov[0] + c->GetSigmaY2()));
207 // Get z-position with respect to anode wire
208 AliTRDSimParam *simParam = AliTRDSimParam::Instance();
209 Int_t istk = fGeo->GetStack(c->GetDetector());
210 AliTRDpadPlane *pp = fGeo->GetPadPlane(ily, istk);
211 Float_t row0 = pp->GetRow0();
212 Float_t d = row0 - zt + simParam->GetAnodeWireOffset();
213 d -= ((Int_t)(2 * d)) / 2.0;
214 if (d > 0.25) d = 0.5 - d;
216 /* AliTRDclusterInfo *clInfo = new AliTRDclusterInfo;
218 clInfo->SetCluster(c);
219 clInfo->SetGlobalPosition(yt, zt, dydx, dzdx);
220 clInfo->SetResolution(dy);
221 clInfo->SetAnisochronity(d);
222 clInfo->SetDriftLength(dx);
223 (*fDebugStream) << "ClusterResiduals"
224 <<"clInfo.=" << clInfo
233 //________________________________________________________
234 TH1* AliTRDtrackingResolution::PlotTracklet(const AliTRDtrackV1 *track)
236 if(track) fTrack = track;
238 AliWarning("No Track defined.");
242 if(!(h = ((TH2I*)fContainer->At(kTrackletY)))){
243 AliWarning("No output histogram defined.");
247 Double_t cov[3], covR[3];
248 Float_t xref, y0, dx, dy, dydx;
249 AliTRDseedV1 *fTracklet = 0x0;
250 for(Int_t il=AliTRDgeometry::kNlayer; il--;){
251 if(!(fTracklet = fTrack->GetTracklet(il))) continue;
252 if(!fTracklet->IsOK()) continue;
253 y0 = fTracklet->GetYref(0);
254 dydx = fTracklet->GetYref(1);
255 xref = fTracklet->GetXref();
256 dx = fTracklet->GetX0() - xref;
257 dy = y0-dx*dydx - fTracklet->GetYat(xref);
258 fTracklet->GetCovAt(xref, cov);
259 fTracklet->GetCovRef(covR);
260 h->Fill(dydx, dy/TMath::Sqrt(cov[0] + covR[0]));
265 //________________________________________________________
266 TH1* AliTRDtrackingResolution::PlotTrackletPhi(const AliTRDtrackV1 *track)
268 if(track) fTrack = track;
270 AliWarning("No Track defined.");
274 if(!(h = ((TH2I*)fContainer->At(kTrackletPhi)))){
275 AliWarning("No output histogram defined.");
279 AliTRDseedV1 *tracklet = 0x0;
280 for(Int_t il=0; il<AliTRDgeometry::kNlayer; il++){
281 if(!(tracklet = fTrack->GetTracklet(il))) continue;
282 if(!tracklet->IsOK()) continue;
283 h->Fill(tracklet->GetYref(1), TMath::ATan(tracklet->GetYref(1))-TMath::ATan(tracklet->GetYfit(1)));
289 //________________________________________________________
290 TH1* AliTRDtrackingResolution::PlotResolution(const AliTRDtrackV1 *track)
293 AliWarning("No MC defined. Results will not be available.");
296 if(track) fTrack = track;
298 AliWarning("No Track defined.");
303 Int_t pdg = fMC->GetPDG(), det=-1;
304 Int_t label = fMC->GetLabel();
305 Float_t p, pt, x0, y0, z0, dx, dy, dz, dydx, dzdx;
308 Double_t DX[12], DY[12], DZ[12], DPt[12], COV[12][15];
309 fMC->PropagateKalman(DX, DY, DZ, DPt, COV);
310 (*fDebugStream) << "MCkalman"
327 AliTRDseedV1 *fTracklet = 0x0;
328 for(Int_t ily=0; ily<AliTRDgeometry::kNlayer; ily++){
329 if(!(fTracklet = fTrack->GetTracklet(ily)) ||
330 !fTracklet->IsOK()) continue;
332 det = fTracklet->GetDetector();
333 x0 = fTracklet->GetX0();
334 //radial shift with respect to the MC reference (radial position of the pad plane)
335 dx = x0 - fTracklet->GetXref();
336 if(!fMC->GetDirections(x0, y0, z0, dydx, dzdx, pt, s)) continue;
337 // MC track position at reference radial position
338 Float_t yt = y0 - dx*dydx;
339 Float_t zt = z0 - dx*dzdx;
340 p = pt*(1.+dzdx*dzdx); // pt -> p
342 // add Kalman residuals for y, z and pt
343 Float_t dxr= fTracklet->GetX0() - x0 + dx;
344 Float_t yr = fTracklet->GetYref(0) - dxr*fTracklet->GetYref(1);
346 Float_t zr = fTracklet->GetZref(0) - dxr*fTracklet->GetZref(1);
348 Float_t tgl = fTracklet->GetTgl();
349 Float_t ptr = fTracklet->GetMomentum()/(1.+tgl*tgl);
351 ((TH2I*)fContainer->At(kMCtrackY))->Fill(dydx, dy);
352 ((TH2I*)fContainer->At(kMCtrackZ))->Fill(dzdx, dz);
353 if(pdg!=kElectron && pdg!=kPositron) ((TH2I*)fContainer->At(kMCtrackPt))->Fill(1./pt, ptr-pt);
354 // Fill Debug stream for Kalman track
356 Float_t dydxr = fTracklet->GetYref(1);
357 (*fDebugStream) << "MCtrack"
373 // recalculate tracklet based on the MC info
374 AliTRDseedV1 tt(*fTracklet);
377 if(!tt.Fit(kTRUE)) continue;
379 // add tracklet residuals for y and dydx
380 Float_t yf = tt.GetYfit(0) - dxr*tt.GetYfit(1);
382 Float_t dphi = (tt.GetYfit(1) - dydx);
383 dphi /= 1.- tt.GetYfit(1)*dydx;
384 ((TH2I*)fContainer->At(kMCtrackletY))->Fill(dydx, dy);
385 ((TH2I*)fContainer->At(kMCtrackletPhi))->Fill(dydx, dphi*TMath::RadToDeg());
388 Bool_t rc = fTracklet->IsRowCross();
390 // add tracklet residuals for z
391 Double_t *xyz = tt.GetCrossXYZ();
392 dz = xyz[2] - (z0 - (x0 - xyz[0])*dzdx) ;
393 ((TH2I*)fContainer->At(kMCtrackletZ))->Fill(dzdx, dz);
396 // Fill Debug stream for tracklet
398 (*fDebugStream) << "MCtracklet"
413 Int_t istk = AliTRDgeometry::GetStack(det);
414 AliTRDpadPlane *pp = fGeo->GetPadPlane(ily, istk);
415 Float_t zr0 = pp->GetRow0() + AliTRDSimParam::Instance()->GetAnodeWireOffset();
416 Float_t tilt = fTracklet->GetTilt();
419 AliTRDcluster *c = 0x0;
420 fTracklet->ResetClusterIter(kFALSE);
421 while((c = fTracklet->PrevCluster())){
422 Float_t q = TMath::Abs(c->GetQ());
423 //AliTRDseedV1::GetClusterXY(c,x,y);
424 x = c->GetX(); y = c->GetY();
427 Float_t zc = c->GetZ();
429 Float_t yt = y0 - dx*dydx;
430 Float_t zt = z0 - dx*dzdx;
431 dy = yt - (yc - tilt*(zc-zt));
434 if(q>20. && q<250.) ((TH2I*)fContainer->At(kMCcluster))->Fill(dydx, dy);
436 // Fill calibration container
437 Float_t d = zr0 - zt;
438 d -= ((Int_t)(2 * d)) / 2.0;
439 if (d > 0.25) d = 0.5 - d;
440 AliTRDclusterInfo *clInfo = new AliTRDclusterInfo;
442 clInfo->SetCluster(c);
443 clInfo->SetMC(pdg, label);
444 clInfo->SetGlobalPosition(yt, zt, dydx, dzdx);
445 clInfo->SetResolution(dy);
446 clInfo->SetAnisochronity(d);
447 clInfo->SetDriftLength(dx);
448 clInfo->SetTilt(tilt);
453 (*fDebugStream) << "MCcluster"
454 <<"clInfo.=" << clInfo
463 //________________________________________________________
464 Bool_t AliTRDtrackingResolution::GetRefFigure(Int_t ifig)
466 Float_t y[2] = {0., 0.};
469 TGraphErrors *g = 0x0;
472 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
474 ax = g->GetHistogram()->GetYaxis();
475 y[0] = -0.5; y[1] = 2.5;
476 ax->SetRangeUser(y[0], y[1]);
477 ax->SetTitle("Cluster-Track Pools #sigma/#mu [mm]");
478 ax = g->GetHistogram()->GetXaxis();
479 ax->SetTitle("tg(#phi)");
480 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
482 b = new TBox(-.15, y[0], .15, y[1]);
483 b->SetFillStyle(3002);b->SetFillColor(kGreen);
484 b->SetLineColor(0); b->Draw();
487 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
489 ax = g->GetHistogram()->GetYaxis();
490 ax->SetRangeUser(-.5, 3.);
491 ax->SetTitle("Tracklet-Track Y-Pools #sigma/#mu [mm]");
492 ax = g->GetHistogram()->GetXaxis();
493 ax->SetTitle("tg(#phi)");
494 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
496 b = new TBox(-.15, y[0], .15, y[1]);
497 b->SetFillStyle(3002);b->SetFillColor(kGreen);
498 b->SetLineColor(0); b->Draw();
501 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
503 ax = g->GetHistogram()->GetYaxis();
504 ax->SetRangeUser(-.5, 2.);
505 ax->SetTitle("Tracklet-Track Phi-Residuals #sigma/#mu [rad]");
506 ax = g->GetHistogram()->GetXaxis();
507 ax->SetTitle("tg(#phi)");
508 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
510 b = new TBox(-.15, y[0], .15, y[1]);
511 b->SetFillStyle(3002);b->SetFillColor(kGreen);
512 b->SetLineColor(0); b->Draw();
515 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
516 ax = g->GetHistogram()->GetYaxis();
517 y[0] = -.1; y[1] = 1.5;
518 ax->SetRangeUser(y[0], y[1]);
519 ax->SetTitle("Y_{cluster} #sigma/#mu [mm]");
520 ax = g->GetHistogram()->GetXaxis();
521 ax->SetTitle("tg(#phi)");
523 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
525 b = new TBox(-.15, y[0], .15, y[1]);
526 b->SetFillStyle(3002);b->SetFillColor(kBlue);
527 b->SetLineColor(0); b->Draw();
530 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
531 ax = g->GetHistogram()->GetYaxis();
532 y[0] = -.05; y[1] = 0.3;
533 ax->SetRangeUser(y[0], y[1]);
534 ax->SetTitle("Y_{tracklet} #sigma/#mu [mm]");
535 ax = g->GetHistogram()->GetXaxis();
536 ax->SetTitle("tg(#phi)");
538 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
540 b = new TBox(-.15, y[0], .15, y[1]);
541 b->SetFillStyle(3002);b->SetFillColor(kBlue);
542 b->SetLineColor(0); b->Draw();
545 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
546 ax = g->GetHistogram()->GetYaxis();
547 ax->SetRangeUser(-.5, 1.);
548 ax->SetTitle("Z_{tracklet} #sigma/#mu [mm]");
549 ax = g->GetHistogram()->GetXaxis();
550 ax->SetTitle("tg(#theta)");
552 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
556 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
557 ax = g->GetHistogram()->GetYaxis();
558 y[0] = -.05; y[1] = .2;
559 ax->SetRangeUser(y[0], y[1]);
560 ax->SetTitle("#Phi_{tracklet} #sigma/#mu [deg]");
561 ax = g->GetHistogram()->GetXaxis();
562 ax->SetTitle("tg(#phi)");
564 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
568 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
569 ax = g->GetHistogram()->GetYaxis();
570 y[0] = -.05; y[1] = 0.2;
571 ax->SetRangeUser(y[0], y[1]);
572 ax->SetTitle("Y_{track} #sigma/#mu [mm]");
573 ax = g->GetHistogram()->GetXaxis();
574 ax->SetTitle("tg(#phi)");
576 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
578 b = new TBox(-.15, y[0], .15, y[1]);
579 b->SetFillStyle(3002);b->SetFillColor(kBlue);
580 b->SetLineColor(0); b->Draw();
583 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
584 ax = g->GetHistogram()->GetYaxis();
585 ax->SetRangeUser(-.5, 2.);
586 ax->SetTitle("Z_{track} #sigma/#mu [mm]");
587 ax = g->GetHistogram()->GetXaxis();
588 ax->SetTitle("tg(#theta)");
590 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
594 if(!(g = (TGraphErrors*)fGraphS->At(ifig))) break;
595 ax = g->GetHistogram()->GetYaxis();
596 ax->SetRangeUser(-.5, 2.);
597 ax->SetTitle("#epsilon_{P_{t}}^{track} / #mu [%]");
598 ax = g->GetHistogram()->GetXaxis();
599 ax->SetTitle("1/p_{t}");
601 if(!(g = (TGraphErrors*)fGraphM->At(ifig))) break;
605 AliInfo(Form("Reference plot [%d] missing result", ifig));
610 //________________________________________________________
611 Bool_t AliTRDtrackingResolution::PostProcess()
613 //fContainer = dynamic_cast<TObjArray*>(GetOutputData(0));
615 Printf("ERROR: list not available");
618 fNRefFigures = fContainer->GetEntriesFast();
619 TGraphErrors *gm = 0x0, *gs = 0x0;
621 fGraphS = new TObjArray(fNRefFigures);
623 for(Int_t ig=0; ig<fNRefFigures; ig++){
624 gs = new TGraphErrors();
625 gs->SetLineColor(kRed);
626 gs->SetMarkerStyle(23);
627 gs->SetMarkerColor(kRed);
628 gs->SetNameTitle(Form("s_%d", ig), "");
629 fGraphS->AddAt(gs, ig);
633 fGraphM = new TObjArray(fNRefFigures);
635 for(Int_t ig=0; ig<fNRefFigures; ig++){
636 gm = new TGraphErrors();
637 gm->SetLineColor(kBlue);
638 gm->SetMarkerStyle(7);
639 gm->SetMarkerColor(kBlue);
640 gm->SetNameTitle(Form("m_%d", ig), "");
641 fGraphM->AddAt(gm, ig);
649 TF1 f("f1", "gaus", -.5, .5);
651 TF1 fb("fb", "[0]*exp(-0.5*((x-[1])/[2])**2)+[3]", -.5, .5);
653 TF1 fc("fc", "[0]*exp(-0.5*((x-[1])/[2])**2)+[3]*exp(-0.5*((x-[4])/[5])**2)", -.5, .5);
656 if(IsVisual()) c = new TCanvas("c", Form("%s Visual", GetName()), 500, 500);
658 sprintf(opt, "%c%c", IsVerbose() ? ' ' : 'Q', IsVisual() ? ' ': 'N');
661 //PROCESS RESIDUAL DISTRIBUTIONS
663 // Clusters residuals
664 h2 = (TH2I *)(fContainer->At(kCluster));
665 gm = (TGraphErrors*)fGraphM->At(kCluster);
666 gs = (TGraphErrors*)fGraphS->At(kCluster);
667 for(Int_t ibin = 1; ibin <= h2->GetNbinsX(); ibin++){
668 Double_t phi = h2->GetXaxis()->GetBinCenter(ibin);
669 h = h2->ProjectionY("py", ibin, ibin);
670 if(h->GetEntries()<100) continue;
673 if(IsVisual()){c->cd(); c->SetLogy();}
674 h->Fit(&f, opt, "", -0.5, 0.5);
675 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
677 Int_t ip = gm->GetN();
678 gm->SetPoint(ip, phi, 10.*f.GetParameter(1));
679 gm->SetPointError(ip, 0., 10.*f.GetParError(1));
680 gs->SetPoint(ip, phi, 10.*f.GetParameter(2));
681 gs->SetPointError(ip, 0., 10.*f.GetParError(2));
684 // Tracklet y residuals
685 h2 = (TH2I *)(fContainer->At(kTrackletY));
686 gm = (TGraphErrors*)fGraphM->At(kTrackletY);
687 gs = (TGraphErrors*)fGraphS->At(kTrackletY);
688 for(Int_t ibin = 1; ibin <= h2->GetNbinsX(); ibin++){
689 Double_t phi = h2->GetXaxis()->GetBinCenter(ibin);
690 h = h2->ProjectionY("py", ibin, ibin);
691 if(h->GetEntries()<100) continue;
694 if(IsVisual()){c->cd(); c->SetLogy();}
695 h->Fit(&f, opt, "", -0.5, 0.5);
696 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
698 Int_t ip = gm->GetN();
699 gm->SetPoint(ip, phi, 10.*f.GetParameter(1));
700 gm->SetPointError(ip, 0., 10.*f.GetParError(1));
701 gs->SetPoint(ip, phi, 10.*f.GetParameter(2));
702 gs->SetPointError(ip, 0., 10.*f.GetParError(2));
705 // Tracklet phi residuals
706 h2 = (TH2I *)(fContainer->At(kTrackletPhi));
707 gm = (TGraphErrors*)fGraphM->At(kTrackletPhi);
708 gs = (TGraphErrors*)fGraphS->At(kTrackletPhi);
709 for(Int_t ibin = 1; ibin <= h2->GetNbinsX(); ibin++){
710 Double_t phi = h2->GetXaxis()->GetBinCenter(ibin);
711 h = h2->ProjectionY("py", ibin, ibin);
712 if(h->GetEntries()<100) continue;
715 if(IsVisual()){c->cd(); c->SetLogy();}
716 h->Fit(&f, opt, "", -0.5, 0.5);
717 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
719 Int_t ip = gm->GetN();
720 gm->SetPoint(ip, phi, 10.*f.GetParameter(1));
721 gm->SetPointError(ip, 0., 10.*f.GetParError(1));
722 gs->SetPoint(ip, phi, 10.*f.GetParameter(2));
723 gs->SetPointError(ip, 0., 10.*f.GetParError(2));
731 //PROCESS MC RESIDUAL DISTRIBUTIONS
733 // cluster y resolution
734 h2 = (TH2I*)fContainer->At(kMCcluster);
735 gm = (TGraphErrors*)fGraphM->At(kMCcluster);
736 gs = (TGraphErrors*)fGraphS->At(kMCcluster);
737 for(Int_t iphi=1; iphi<=h2->GetNbinsX(); iphi++){
738 h = h2->ProjectionY("py", iphi, iphi);
739 if(h->GetEntries()<100) continue;
742 if(IsVisual()){c->cd(); c->SetLogy();}
743 h->Fit(&f, opt, "", -0.5, 0.5);
745 printf("phi[%d] mean[%e] sigma[%e]\n\n", iphi, 10.*f.GetParameter(1), 10.*f.GetParameter(2));
747 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
749 Double_t phi = h2->GetXaxis()->GetBinCenter(iphi);
750 Int_t ip = gm->GetN();
751 gm->SetPoint(ip, phi, 10.*f.GetParameter(1));
752 gm->SetPointError(ip, 0., 10.*f.GetParError(1));
753 gs->SetPoint(ip, phi, 10.*f.GetParameter(2));
754 gs->SetPointError(ip, 0., 10.*f.GetParError(2));
757 // tracklet y resolution
758 h2 = (TH2I*)fContainer->At(kMCtrackletY);
759 gm = (TGraphErrors*)fGraphM->At(kMCtrackletY);
760 gs = (TGraphErrors*)fGraphS->At(kMCtrackletY);
761 for(Int_t iphi=1; iphi<=h2->GetNbinsX(); iphi++){
762 h = h2->ProjectionY("py", iphi, iphi);
763 if(h->GetEntries()<100) continue;
766 if(IsVisual()){c->cd(); c->SetLogy();}
767 h->Fit(&f, opt, "", -0.5, 0.5);
768 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
770 Double_t phi = h2->GetXaxis()->GetBinCenter(iphi);
771 Int_t ip = gm->GetN();
772 gm->SetPoint(ip, phi, 10.*f.GetParameter(1));
773 gm->SetPointError(ip, 0., 10.*f.GetParError(1));
774 gs->SetPoint(ip, phi, 10.*f.GetParameter(2));
775 gs->SetPointError(ip, 0., 10.*f.GetParError(2));
778 // tracklet z resolution
779 h2 = (TH2I*)fContainer->At(kMCtrackletZ);
780 gm = (TGraphErrors*)fGraphM->At(kMCtrackletZ);
781 gs = (TGraphErrors*)fGraphS->At(kMCtrackletZ);
782 for(Int_t iphi=1; iphi<=h2->GetNbinsX(); iphi++){
783 h = h2->ProjectionY("py", iphi, iphi);
784 if(h->GetEntries()<100) continue;
787 if(IsVisual()){c->cd(); c->SetLogy();}
788 h->Fit(&fb, opt, "", -0.5, 0.5);
789 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
791 Double_t phi = h2->GetXaxis()->GetBinCenter(iphi);
792 Int_t ip = gm->GetN();
793 gm->SetPoint(ip, phi, 10.*fb.GetParameter(1));
794 gm->SetPointError(ip, 0., 10.*fb.GetParError(1));
795 gs->SetPoint(ip, phi, 10.*fb.GetParameter(2));
796 gs->SetPointError(ip, 0., 10.*fb.GetParError(2));
799 //tracklet phi resolution
800 h2 = (TH2I*)fContainer->At(kMCtrackletPhi);
801 gm = (TGraphErrors*)fGraphM->At(kMCtrackletPhi);
802 gs = (TGraphErrors*)fGraphS->At(kMCtrackletPhi);
803 for(Int_t iphi=1; iphi<=h2->GetNbinsX(); iphi++){
804 h = h2->ProjectionY("py", iphi, iphi);
805 if(h->GetEntries()<100) continue;
807 if(IsVisual()){c->cd(); c->SetLogy();}
808 h->Fit(&f, opt, "", -0.5, 0.5);
809 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
811 Double_t phi = h2->GetXaxis()->GetBinCenter(iphi);
812 Int_t ip = gm->GetN();
813 gm->SetPoint(ip, phi, f.GetParameter(1));
814 gm->SetPointError(ip, 0., f.GetParError(1));
815 gs->SetPoint(ip, phi, f.GetParameter(2));
816 gs->SetPointError(ip, 0., f.GetParError(2));
819 // track y resolution
820 h2 = (TH2I*)fContainer->At(kMCtrackY);
821 gm = (TGraphErrors*)fGraphM->At(kMCtrackY);
822 gs = (TGraphErrors*)fGraphS->At(kMCtrackY);
823 for(Int_t iphi=1; iphi<=h2->GetNbinsX(); iphi++){
824 h = h2->ProjectionY("py", iphi, iphi);
825 if(h->GetEntries()<100) continue;
828 if(IsVisual()){c->cd(); c->SetLogy();}
829 h->Fit(&f, opt, "", -0.5, 0.5);
830 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
832 Double_t phi = h2->GetXaxis()->GetBinCenter(iphi);
833 Int_t ip = gm->GetN();
834 gm->SetPoint(ip, phi, 10.*f.GetParameter(1));
835 gm->SetPointError(ip, 0., 10.*f.GetParError(1));
836 gs->SetPoint(ip, phi, 10.*f.GetParameter(2));
837 gs->SetPointError(ip, 0., 10.*f.GetParError(2));
840 // track z resolution
841 h2 = (TH2I*)fContainer->At(kMCtrackZ);
842 gm = (TGraphErrors*)fGraphM->At(kMCtrackZ);
843 gs = (TGraphErrors*)fGraphS->At(kMCtrackZ);
844 for(Int_t iphi=1; iphi<=h2->GetNbinsX(); iphi++){
845 h = h2->ProjectionY("pz", iphi, iphi);
846 if(h->GetEntries()<70) continue;
849 if(IsVisual()){c->cd(); c->SetLogy();}
850 h->Fit(&f, opt, "", -0.5, 0.5);
851 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
853 Double_t phi = h2->GetXaxis()->GetBinCenter(iphi);
854 Int_t ip = gm->GetN();
855 gm->SetPoint(ip, phi, 10.*f.GetParameter(1));
856 gm->SetPointError(ip, 0., 10.*f.GetParError(1));
857 gs->SetPoint(ip, phi, 10.*f.GetParameter(2));
858 gs->SetPointError(ip, 0., 10.*f.GetParError(2));
861 // track Pt resolution
862 h2 = (TH2I*)fContainer->At(kMCtrackPt);
863 TAxis *ax = h2->GetXaxis();
864 gm = (TGraphErrors*)fGraphM->At(kMCtrackPt);
865 gs = (TGraphErrors*)fGraphS->At(kMCtrackPt);
866 TF1 fg("fg", "gaus", -1.5, 1.5);
867 TF1 fl("fl", "landau", -4., 15.);
868 TF1 fgl("fgl", "gaus(0)+landau(3)", -5., 20.);
869 for(Int_t ip=1; ip<=ax->GetNbins(); ip++){
870 h = h2->ProjectionY("ppt", ip, ip);
871 if(h->GetEntries()<70) continue;
873 h->Fit(&fg, "QN", "", -1.5, 1.5);
874 fgl.SetParameter(0, fg.GetParameter(0));
875 fgl.SetParameter(1, fg.GetParameter(1));
876 fgl.SetParameter(2, fg.GetParameter(2));
877 h->Fit(&fl, "QN", "", -4., 15.);
878 fgl.SetParameter(3, fl.GetParameter(0));
879 fgl.SetParameter(4, fl.GetParameter(1));
880 fgl.SetParameter(5, fl.GetParameter(2));
882 if(IsVisual()){c->cd(); c->SetLogy();}
883 h->Fit(&fgl, opt, "", -5., 20.);
884 if(IsVisual()){c->Modified(); c->Update(); gSystem->Sleep(500);}
886 Float_t invpt = ax->GetBinCenter(ip);
887 Int_t ip = gm->GetN();
888 gm->SetPoint(ip, invpt, fgl.GetParameter(1));
889 gm->SetPointError(ip, 0., fgl.GetParError(1));
890 gs->SetPoint(ip, invpt, fgl.GetParameter(2)*invpt);
891 gs->SetPointError(ip, 0., fgl.GetParError(2));
892 // fgl.GetParameter(4) // Landau MPV
893 // fgl.GetParameter(5) // Landau Sigma
902 //________________________________________________________
903 void AliTRDtrackingResolution::Terminate(Option_t *)
910 if(HasPostProcess()) PostProcess();
913 //________________________________________________________
914 void AliTRDtrackingResolution::AdjustF1(TH1 *h, TF1 *f)
916 // Helper function to avoid duplication of code
917 // Make first guesses on the fit parameters
919 // find the intial parameters of the fit !! (thanks George)
920 Int_t nbinsy = Int_t(.5*h->GetNbinsX());
922 for(Int_t jbin=nbinsy-4; jbin<=nbinsy+4; jbin++) sum+=h->GetBinContent(jbin); sum/=9.;
923 f->SetParLimits(0, 0., 3.*sum);
924 f->SetParameter(0, .9*sum);
926 f->SetParLimits(1, -.2, .2);
927 f->SetParameter(1, -0.1);
929 f->SetParLimits(2, 0., 4.e-1);
930 f->SetParameter(2, 2.e-2);
931 if(f->GetNpar() <= 4) return;
933 f->SetParLimits(3, 0., sum);
934 f->SetParameter(3, .1*sum);
936 f->SetParLimits(4, -.3, .3);
937 f->SetParameter(4, 0.);
939 f->SetParLimits(5, 0., 1.e2);
940 f->SetParameter(5, 2.e-1);
943 //________________________________________________________
944 TObjArray* AliTRDtrackingResolution::Histos()
946 if(fContainer) return fContainer;
948 fContainer = new TObjArray(10);
949 //fContainer->SetOwner(kTRUE);
952 // cluster to tracklet residuals [2]
953 if(!(h = (TH2I*)gROOT->FindObject("hCl"))){
954 h = new TH2I("hCl", "Clusters-Track Residuals", 21, -.33, .33, 100, -.5, .5);
955 h->GetXaxis()->SetTitle("tg(#phi)");
956 h->GetYaxis()->SetTitle("#Delta y [cm]");
957 h->GetZaxis()->SetTitle("entries");
959 fContainer->AddAt(h, kCluster);
961 // tracklet to track residuals [2]
962 if(!(h = (TH2I*)gROOT->FindObject("hTrkltY"))){
963 h = new TH2I("hTrkltY", "Tracklets-Track Residuals (Y)", 21, -.33, .33, 100, -.5, .5);
964 h->GetXaxis()->SetTitle("tg(#phi)");
965 h->GetYaxis()->SetTitle("#Delta y [cm]");
966 h->GetZaxis()->SetTitle("entries");
968 fContainer->AddAt(h, kTrackletY);
970 // tracklet to track residuals angular [2]
971 if(!(h = (TH2I*)gROOT->FindObject("hTrkltPhi"))){
972 h = new TH2I("hTrkltPhi", "Tracklets-Track Residuals (#Phi)", 21, -.33, .33, 100, -.5, .5);
973 h->GetXaxis()->SetTitle("tg(#phi)");
974 h->GetYaxis()->SetTitle("#Delta phi [#circ]");
975 h->GetZaxis()->SetTitle("entries");
977 fContainer->AddAt(h, kTrackletPhi);
981 if(!HasMCdata()) return fContainer;
983 // cluster y resolution [0]
984 if(!(h = (TH2I*)gROOT->FindObject("hMCcl"))){
985 h = new TH2I("hMCcl", "Cluster Resolution", 31, -.48, .48, 100, -.5, .5);
986 h->GetXaxis()->SetTitle("tg(#phi)");
987 h->GetYaxis()->SetTitle("#Delta y [cm]");
988 h->GetZaxis()->SetTitle("entries");
990 fContainer->AddAt(h, kMCcluster);
992 // tracklet y resolution [0]
993 if(!(h = (TH2I*)gROOT->FindObject("hMCtrkltY"))){
994 h = new TH2I("hMCtrkltY", "Tracklet Resolution (Y)", 31, -.48, .48, 100, -.5, .5);
995 h->GetXaxis()->SetTitle("tg(#phi)");
996 h->GetYaxis()->SetTitle("#Delta y [cm]");
997 h->GetZaxis()->SetTitle("entries");
999 fContainer->AddAt(h, kMCtrackletY);
1001 // tracklet y resolution [0]
1002 if(!(h = (TH2I*)gROOT->FindObject("hMCtrkltZ"))){
1003 h = new TH2I("hMCtrkltZ", "Tracklet Resolution (Z)", 31, -.48, .48, 100, -.5, .5);
1004 h->GetXaxis()->SetTitle("tg(#theta)");
1005 h->GetYaxis()->SetTitle("#Delta z [cm]");
1006 h->GetZaxis()->SetTitle("entries");
1008 fContainer->AddAt(h, kMCtrackletZ);
1010 // tracklet angular resolution [1]
1011 if(!(h = (TH2I*)gROOT->FindObject("hMCtrkltPhi"))){
1012 h = new TH2I("hMCtrkltPhi", "Tracklet Resolution (#Phi)", 31, -.48, .48, 100, -10., 10.);
1013 h->GetXaxis()->SetTitle("tg(#phi)");
1014 h->GetYaxis()->SetTitle("#Delta #phi [deg]");
1015 h->GetZaxis()->SetTitle("entries");
1017 fContainer->AddAt(h, kMCtrackletPhi);
1019 // Kalman track y resolution
1020 if(!(h = (TH2I*)gROOT->FindObject("hMCtrkY"))){
1021 h = new TH2I("hMCtrkY", "Kalman Track Resolution (Y)", 31, -.48, .48, 100, -.5, .5);
1022 h->GetXaxis()->SetTitle("tg(#phi)");
1023 h->GetYaxis()->SetTitle("#Delta y [cm]");
1024 h->GetZaxis()->SetTitle("entries");
1026 fContainer->AddAt(h, kMCtrackY);
1028 // Kalman track Z resolution
1029 if(!(h = (TH2I*)gROOT->FindObject("hMCtrkZ"))){
1030 h = new TH2I("hMCtrkZ", "Kalman Track Resolution (Z)", 20, -1., 1., 100, -1.5, 1.5);
1031 h->GetXaxis()->SetTitle("tg(#theta)");
1032 h->GetYaxis()->SetTitle("#Delta z [cm]");
1033 h->GetZaxis()->SetTitle("entries");
1035 fContainer->AddAt(h, kMCtrackZ);
1037 // Kalman track Pt resolution
1038 if(!(h = (TH2I*)gROOT->FindObject("hMCtrkPt"))){
1039 h = new TH2I("hMCtrkPt", "Kalman Track Resolution (Pt)", 100, 0., 2., 150, -5., 20.);
1040 h->GetXaxis()->SetTitle("1/p_{t}");
1041 h->GetYaxis()->SetTitle("#Delta p_{t} [GeV/c]");
1042 h->GetZaxis()->SetTitle("entries");
1044 fContainer->AddAt(h, kMCtrackPt);
1050 //________________________________________________________
1051 void AliTRDtrackingResolution::SetRecoParam(AliTRDrecoParam *r)
1054 fReconstructor->SetRecoParam(r);