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-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 **************************************************************************/
16 // Toolkit containing various usefull things
17 // Usable everywhere in the hfe software package
18 // For more information see the cxx file
21 // All authors of the HFE group
24 #include <TParticle.h>
29 #include "TGraphErrors.h"
30 #include "THnSparse.h"
35 #include "AliAODMCParticle.h"
36 #include "AliAODpidUtil.h"
37 #include "AliESDpid.h"
39 #include "AliTPCPIDResponse.h"
40 #include "AliTOFPIDResponse.h"
42 #include "AliHFEtools.h"
46 AliPIDResponse *AliHFEtools::fgDefaultPID = NULL;
47 Int_t AliHFEtools::fgLogLevel = 0;
49 //__________________________________________
50 AliHFEtools::AliHFEtools():
55 //__________________________________________
56 Double_t *AliHFEtools::MakeLinearBinning(Int_t nBins, Double_t ymin, Double_t ymax){
58 // Helper function for linearly binned array
60 Double_t *bins = new Double_t[nBins + 1];
61 Double_t stepsize = (ymax - ymin) / static_cast<Double_t>(nBins);
63 for(Int_t ibin = 1; ibin <= nBins; ibin++)
64 bins[ibin] = bins[ibin-1] + stepsize;
68 //__________________________________________
69 Double_t *AliHFEtools::MakeLogarithmicBinning(Int_t nBins, Double_t ymin, Double_t ymax){
71 // Helper function for logartimically binned array
73 Double_t *bins = new Double_t[nBins+1];
75 Double_t factor = TMath::Power(ymax/ymin, 1./nBins);
76 for(Int_t ibin = 1; ibin <= nBins; ibin++){
77 bins[ibin] = factor * bins[ibin-1];
82 //_________________________________________
83 Bool_t AliHFEtools::BinLogAxis(TObject *o, Int_t dim){
86 // converts the axis (defined by the dimension) of THx or THnSparse
87 // object to Log scale. Number of bins and bin min and bin max are preserved
92 AliError("Input histogram is null pointer");
97 if(o->InheritsFrom("TH1")){
98 TH1 *h1 = dynamic_cast<TH1F*>(o);
99 if(h1) axis = h1->GetXaxis();
101 else if(o->InheritsFrom("TH2")){
102 TH2 *h2 = dynamic_cast<TH2F*>(o);
104 axis = h2->GetXaxis();
106 else if(h2 && 1 == dim){
107 axis = h2->GetYaxis();
110 AliError("Only dim = 0 or 1 possible for TH2F");
113 else if(o->InheritsFrom("THnSparse")){
114 THnSparse *hs = dynamic_cast<THnSparse*>(o);
115 if(hs) axis = hs->GetAxis(dim);
118 AliError("Type of input object not recognized, please check your code or update this finction");
122 AliError(Form("Axis '%d' could not be identified in the object \n", dim));
126 Int_t bins = axis->GetNbins();
128 Double_t from = axis->GetXmin();
130 AliError(Form("Log binning not possible for this axis [min = %f]\n", from));
132 Double_t to = axis->GetXmax();
133 Double_t *newBins = new Double_t[bins+1];
135 Double_t factor = TMath::Power(to/from, 1./bins);
136 for(Int_t i=1; i<=bins; ++i){
137 newBins[i] = factor * newBins[i-1];
139 axis->Set(bins, newBins);
145 //__________________________________________
146 Float_t AliHFEtools::GetRapidity(const TParticle *part){
151 if(!((part->Energy() - part->Pz())*(part->Energy() + part->Pz())>0)) rapidity=-999;
152 else rapidity = 0.5*(TMath::Log((part->Energy()+part->Pz()) / (part->Energy()-part->Pz())));
156 //__________________________________________
157 Float_t AliHFEtools::GetRapidity(const AliAODMCParticle *part){
161 if(!((part->E() - part->Pz())*(part->E() + part->Pz())>0)) rapidity=-999;
162 else rapidity = 0.5*(TMath::Log((part->E()+part->Pz()) / (part->E()-part->Pz())));
166 //__________________________________________
167 AliPIDResponse* AliHFEtools::GetDefaultPID(Bool_t isMC, Bool_t isESD){
169 // Get the default PID as singleton instance
173 if(isESD) fgDefaultPID = new AliESDpid;
174 else fgDefaultPID = new AliAODpidUtil;
175 Double_t tres = isMC ? 80. : 130.;
176 fgDefaultPID->GetTOFResponse().SetTimeResolution(tres);
178 // TPC Bethe Bloch parameters
179 Double_t alephParameters[5];
182 alephParameters[0] = 2.15898e+00/50.;
183 alephParameters[1] = 1.75295e+01;
184 alephParameters[2] = 3.40030e-09;
185 alephParameters[3] = 1.96178e+00;
186 alephParameters[4] = 3.91720e+00;
188 alephParameters[0] = 0.0283086/0.97;
189 //alephParameters[0] = 0.0283086;
190 alephParameters[1] = 2.63394e+01;
191 alephParameters[2] = 5.04114e-11;
192 alephParameters[3] = 2.12543e+00;
193 alephParameters[4] = 4.88663e+00;
195 fgDefaultPID->GetTPCResponse().SetBetheBlochParameters(alephParameters[0],alephParameters[1],alephParameters[2], alephParameters[3],alephParameters[4]);
196 fgDefaultPID->GetTPCResponse().SetSigma(3.79301e-03, 2.21280e+04);
200 printf("Error - You are using the default PID: You should use the PID coming from the tender\n");
201 printf("Error - Arrrrrrrrr...\n");
202 printf("Error - Please rethink your program logic. Using default PID is really dangerous\n");
203 printf("Error - TOF PID is adapted to Monte Carlo\n");
209 //__________________________________________
210 void AliHFEtools::DestroyDefaultPID(){
212 // Destroy default PID object if existing
214 if(fgDefaultPID) delete fgDefaultPID;
218 //__________________________________________
219 Int_t AliHFEtools::GetPdg(const AliVParticle *track){
221 // Get MC PDG code (only MC particles supported)
224 if(!TString(track->IsA()->GetName()).CompareTo("AliMCParticle")){
225 const AliMCParticle *mctrack = dynamic_cast<const AliMCParticle *>(track);
226 pdg = mctrack ? mctrack->Particle()->GetPdgCode() : 0;
227 } else if(!TString(track->IsA()->GetName()).CompareTo("AliAODMCParticle")){
228 const AliAODMCParticle *aodmctrack = dynamic_cast<const AliAODMCParticle *>(track);
229 pdg = aodmctrack ? aodmctrack->GetPdgCode() : 0;
234 //__________________________________________
235 Int_t AliHFEtools::PDG2AliPID(Int_t pdg){
237 // Helper function to convert MC PID codes into AliPID codes
240 switch(TMath::Abs(pdg)){
241 case 11: pid = AliPID::kElectron; break;
242 case 13: pid = AliPID::kMuon; break;
243 case 211: pid = AliPID::kPion; break;
244 case 321: pid = AliPID::kKaon; break;
245 case 2212: pid = AliPID::kProton; break;
246 default: pid = -1; break;
251 //__________________________________________
252 TH1D* AliHFEtools::GraphErrorsToHist(TGraphErrors* g, Double_t firstBinWidth, Bool_t exchange, Int_t markerstyle,Int_t markercolor,Float_t markersize)
254 // Creates a TH1D from TGraph g. The binwidth of the first bin has to
255 // specified. The others bins are calculated automatically. Supports also Graphs
256 // with non constant x steps. The axis of the Graph can be exchanged if
257 // exchange=kTRUE (modifies the Graph).
259 TH1D* result = GraphToHist(g,firstBinWidth,exchange, markerstyle,markercolor,markersize);
260 if( result == 0) return result;
262 //------------------------------------------
263 // setup the final hist
264 Int_t nBinX = g->GetN();
265 Double_t* err = g->GetEY(); // error y is still ok even if exchanged
266 for(Int_t i = 0; i < nBinX; i ++){
267 result->SetBinError(i + 1, err[i]);
270 AliHFEtools::ExchangeXYGraph(g); // undo what has been done in GraphToHist
271 AliHFEtools::ExchangeXYGraphErrors(g); // now exchange including errors
277 //__________________________________________
278 Bool_t AliHFEtools::ExchangeXYGraph(TGraph* g)
280 // exchanges x-values and y-values.
281 if(g==0) return kFALSE;
282 Int_t nbin=g->GetN();
284 for(Int_t i = 0; i < nbin; i ++)
293 //__________________________________________
294 Bool_t AliHFEtools::ExchangeXYGraphErrors(TGraphErrors* g)
296 // exchanges x-values and y-values and
297 // corresponding errors.
298 if(g==0) return kFALSE;
299 Int_t nbin=g->GetN();
302 for(Int_t i = 0; i < nbin; i ++)
305 ex = g->GetErrorX(i);
306 ey = g->GetErrorY(i);
308 g->SetPointError(i,ey,ex);
315 //__________________________________________
316 TH1D* AliHFEtools::GraphToHist(TGraph* g, Double_t firstBinWidth, Bool_t exchange, Int_t markerstyle,Int_t markercolor,Float_t markersize)
318 // Creates a TH1D from TGraph g. The binwidth of the first bin has to
319 // specified. The others bins are calculated automatically. Supports also Graphs
320 // with non constant x steps. The axis of the Graph can be exchanged if
321 // exchange=kTRUE (modifies the Graph).
325 if(g == 0) return result;
326 if(firstBinWidth == -1) return result;
328 myname = g->GetName();
330 if(exchange) AliHFEtools::ExchangeXYGraph(g);
332 Int_t nBinX = g->GetN();
333 Double_t* x = g->GetX();
334 Double_t* y = g->GetY();
336 if(nBinX < 1) return result;
338 //------------------------------------------
339 // create the Matrix for the equation system
340 // and init the values
342 Int_t nDim = nBinX - 1;
343 TMatrixD a(nDim,nDim);
346 Double_t* aA = a.GetMatrixArray();
347 Double_t* aB = b.GetMatrixArray();
348 memset(aA,0,nDim * nDim * sizeof(Double_t));
349 memset(aB,0,nDim * sizeof(Double_t));
350 //------------------------------------------
352 //------------------------------------------
353 // setup equation system
354 // width for 1st bin is given therefore
355 // we shift bin parameter (column) by one to the left
356 // to reduce the matrix size
358 Double_t* xAxis = new Double_t [nBinX + 1];
359 Double_t* binW = new Double_t [nBinX ];
360 binW[0] = firstBinWidth;
362 aB[0] = x[1] - x[0] - 0.5 * binW[0];
365 for(Int_t col = 1; col < nDim ; col ++)
368 aB[col] = x[col + 1] - x[ col ];
369 aA[row * nDim + col - 1 ] = 0.5;
370 aA[row * nDim + col ] = 0.5;
372 //------------------------------------------
374 //------------------------------------------
375 // solve the equations
378 //------------------------------------------
380 //------------------------------------------
381 // calculate the bin boundaries
382 xAxis[0] = x[0] - 0.5 * binW[0];
383 memcpy(&binW[1],c.GetMatrixArray(),nDim * sizeof(Double_t));
384 for(Int_t col = 0; col < nBinX ; col ++) {
385 xAxis[col + 1] = x[col] + 0.5 * binW[col];
387 //------------------------------------------
389 //------------------------------------------
390 // setup the final hist
391 result = new TH1D(myname.Data(),myname.Data(),nBinX, xAxis);
392 for(Int_t i = 0; i < nBinX; i ++){
393 result->SetBinContent(i + 1, y[i]);
395 result->SetMarkerColor(markercolor);
396 result->SetMarkerStyle(markerstyle);
397 result->SetMarkerSize(markersize);
398 //------------------------------------------