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
25 #include <TParticle.h>
31 #include "TGraphErrors.h"
32 #include "THnSparse.h"
37 #include "AliAODMCParticle.h"
38 #include "AliAODpidUtil.h"
39 #include "AliESDpid.h"
41 #include "AliTPCPIDResponse.h"
42 #include "AliTOFPIDResponse.h"
44 #include "AliHFEtools.h"
48 AliPIDResponse *AliHFEtools::fgDefaultPID = NULL;
49 Int_t AliHFEtools::fgLogLevel = 0;
51 //__________________________________________
52 AliHFEtools::AliHFEtools():
57 //__________________________________________
58 Double_t *AliHFEtools::MakeLinearBinning(Int_t nBins, Double_t ymin, Double_t ymax){
60 // Helper function for linearly binned array
62 Double_t *bins = new Double_t[nBins + 1];
63 Double_t stepsize = (ymax - ymin) / static_cast<Double_t>(nBins);
65 for(Int_t ibin = 1; ibin <= nBins; ibin++)
66 bins[ibin] = bins[ibin-1] + stepsize;
70 //__________________________________________
71 void AliHFEtools::FillLinearBinning(TArrayD &bins, Int_t nBins, Double_t ymin, Double_t ymax){
73 // Helper function for linearly binned array
75 Double_t stepsize = (ymax - ymin) / static_cast<Double_t>(nBins);
77 for(Int_t ibin = 1; ibin <= nBins; ibin++)
78 bins[ibin] = bins[ibin-1] + stepsize;
81 //__________________________________________
82 Double_t *AliHFEtools::MakeLogarithmicBinning(Int_t nBins, Double_t ymin, Double_t ymax){
84 // Helper function for logartimically binned array
86 Double_t *bins = new Double_t[nBins+1];
88 Double_t factor = TMath::Power(ymax/ymin, 1./nBins);
89 for(Int_t ibin = 1; ibin <= nBins; ibin++){
90 bins[ibin] = factor * bins[ibin-1];
95 //__________________________________________
96 void AliHFEtools::FillLogarithmicBinning(TArrayD &bins, Int_t nBins, Double_t ymin, Double_t ymax){
98 // Helper function for logartimically binned array
101 Double_t factor = TMath::Power(ymax/ymin, 1./nBins);
102 for(Int_t ibin = 1; ibin <= nBins; ibin++)
103 bins[ibin] = factor * bins[ibin-1];
106 //_________________________________________
107 Bool_t AliHFEtools::BinLogAxis(TObject *o, Int_t dim){
110 // converts the axis (defined by the dimension) of THx or THnSparse
111 // object to Log scale. Number of bins and bin min and bin max are preserved
116 AliError("Input histogram is null pointer");
121 if(o->InheritsFrom("TH1")){
122 TH1 *h1 = dynamic_cast<TH1F*>(o);
123 if(h1) axis = h1->GetXaxis();
125 else if(o->InheritsFrom("TH2")){
126 TH2 *h2 = dynamic_cast<TH2F*>(o);
128 axis = h2->GetXaxis();
130 else if(h2 && 1 == dim){
131 axis = h2->GetYaxis();
134 AliError("Only dim = 0 or 1 possible for TH2F");
137 else if(o->InheritsFrom("THnSparse")){
138 THnSparse *hs = dynamic_cast<THnSparse*>(o);
139 if(hs) axis = hs->GetAxis(dim);
142 AliError("Type of input object not recognized, please check your code or update this finction");
146 AliError(Form("Axis '%d' could not be identified in the object \n", dim));
150 Int_t bins = axis->GetNbins();
152 Double_t from = axis->GetXmin();
154 AliError(Form("Log binning not possible for this axis [min = %f]\n", from));
156 Double_t to = axis->GetXmax();
157 TArrayD newBins(bins+1);
159 Double_t factor = TMath::Power(to/from, 1./bins);
160 for(Int_t i=1; i<=bins; ++i){
161 newBins[i] = factor * newBins[i-1];
163 axis->Set(bins, newBins.GetArray());
168 //__________________________________________
169 Float_t AliHFEtools::GetRapidity(const TParticle *part){
174 if(!((part->Energy() - part->Pz())*(part->Energy() + part->Pz())>0)) rapidity=-999;
175 else rapidity = 0.5*(TMath::Log((part->Energy()+part->Pz()) / (part->Energy()-part->Pz())));
179 //__________________________________________
180 Float_t AliHFEtools::GetRapidity(const AliAODMCParticle *part){
184 if(!((part->E() - part->Pz())*(part->E() + part->Pz())>0)) rapidity=-999;
185 else rapidity = 0.5*(TMath::Log((part->E()+part->Pz()) / (part->E()-part->Pz())));
189 //__________________________________________
190 AliPIDResponse* AliHFEtools::GetDefaultPID(Bool_t isMC, Bool_t isESD){
192 // Get the default PID as singleton instance
196 if(isESD) fgDefaultPID = new AliESDpid;
197 else fgDefaultPID = new AliAODpidUtil;
198 Double_t tres = isMC ? 80. : 130.;
199 fgDefaultPID->GetTOFResponse().SetTimeResolution(tres);
201 // TPC Bethe Bloch parameters
202 Double_t alephParameters[5];
205 alephParameters[0] = 2.15898e+00/50.;
206 alephParameters[1] = 1.75295e+01;
207 alephParameters[2] = 3.40030e-09;
208 alephParameters[3] = 1.96178e+00;
209 alephParameters[4] = 3.91720e+00;
211 alephParameters[0] = 0.0283086/0.97;
212 //alephParameters[0] = 0.0283086;
213 alephParameters[1] = 2.63394e+01;
214 alephParameters[2] = 5.04114e-11;
215 alephParameters[3] = 2.12543e+00;
216 alephParameters[4] = 4.88663e+00;
218 fgDefaultPID->GetTPCResponse().SetBetheBlochParameters(alephParameters[0],alephParameters[1],alephParameters[2], alephParameters[3],alephParameters[4]);
219 fgDefaultPID->GetTPCResponse().SetSigma(3.79301e-03, 2.21280e+04);
223 printf("Error - You are using the default PID: You should use the PID coming from the tender\n");
224 printf("Error - Arrrrrrrrr...\n");
225 printf("Error - Please rethink your program logic. Using default PID is really dangerous\n");
226 printf("Error - TOF PID is adapted to Monte Carlo\n");
232 //__________________________________________
233 void AliHFEtools::DestroyDefaultPID(){
235 // Destroy default PID object if existing
237 if(fgDefaultPID) delete fgDefaultPID;
241 //__________________________________________
242 Int_t AliHFEtools::GetPdg(const AliVParticle *track){
244 // Get MC PDG code (only MC particles supported)
247 if(!TString(track->IsA()->GetName()).CompareTo("AliMCParticle")){
248 const AliMCParticle *mctrack = dynamic_cast<const AliMCParticle *>(track);
249 pdg = mctrack ? mctrack->Particle()->GetPdgCode() : 0;
250 } else if(!TString(track->IsA()->GetName()).CompareTo("AliAODMCParticle")){
251 const AliAODMCParticle *aodmctrack = dynamic_cast<const AliAODMCParticle *>(track);
252 pdg = aodmctrack ? aodmctrack->GetPdgCode() : 0;
257 //__________________________________________
258 Int_t AliHFEtools::PDG2AliPID(Int_t pdg){
260 // Helper function to convert MC PID codes into AliPID codes
263 switch(TMath::Abs(pdg)){
264 case 11: pid = AliPID::kElectron; break;
265 case 13: pid = AliPID::kMuon; break;
266 case 211: pid = AliPID::kPion; break;
267 case 321: pid = AliPID::kKaon; break;
268 case 2212: pid = AliPID::kProton; break;
269 default: pid = -1; break;
274 //__________________________________________
275 TH1D* AliHFEtools::GraphErrorsToHist(TGraphErrors* g, Double_t firstBinWidth, Bool_t exchange, Int_t markerstyle,Int_t markercolor,Float_t markersize)
277 // Creates a TH1D from TGraph g. The binwidth of the first bin has to
278 // specified. The others bins are calculated automatically. Supports also Graphs
279 // with non constant x steps. The axis of the Graph can be exchanged if
280 // exchange=kTRUE (modifies the Graph).
282 TH1D* result = GraphToHist(g,firstBinWidth,exchange, markerstyle,markercolor,markersize);
283 if( result == 0) return result;
285 //------------------------------------------
286 // setup the final hist
287 Int_t nBinX = g->GetN();
288 Double_t* err = g->GetEY(); // error y is still ok even if exchanged
289 for(Int_t i = 0; i < nBinX; i ++){
290 result->SetBinError(i + 1, err[i]);
293 AliHFEtools::ExchangeXYGraph(g); // undo what has been done in GraphToHist
294 AliHFEtools::ExchangeXYGraphErrors(g); // now exchange including errors
300 //__________________________________________
301 Bool_t AliHFEtools::ExchangeXYGraph(TGraph* g)
303 // exchanges x-values and y-values.
304 if(g==0) return kFALSE;
305 Int_t nbin=g->GetN();
307 for(Int_t i = 0; i < nbin; i ++)
316 //__________________________________________
317 Bool_t AliHFEtools::ExchangeXYGraphErrors(TGraphErrors* g)
319 // exchanges x-values and y-values and
320 // corresponding errors.
321 if(g==0) return kFALSE;
322 Int_t nbin=g->GetN();
325 for(Int_t i = 0; i < nbin; i ++)
328 ex = g->GetErrorX(i);
329 ey = g->GetErrorY(i);
331 g->SetPointError(i,ey,ex);
338 //__________________________________________
339 TH1D* AliHFEtools::GraphToHist(TGraph* g, Double_t firstBinWidth, Bool_t exchange, Int_t markerstyle,Int_t markercolor,Float_t markersize)
341 // Creates a TH1D from TGraph g. The binwidth of the first bin has to
342 // specified. The others bins are calculated automatically. Supports also Graphs
343 // with non constant x steps. The axis of the Graph can be exchanged if
344 // exchange=kTRUE (modifies the Graph).
348 if(g == 0) return result;
349 if(firstBinWidth == -1) return result;
351 myname = g->GetName();
353 if(exchange) AliHFEtools::ExchangeXYGraph(g);
355 Int_t nBinX = g->GetN();
356 Double_t* x = g->GetX();
357 Double_t* y = g->GetY();
359 if(nBinX < 1) return result;
361 //------------------------------------------
362 // create the Matrix for the equation system
363 // and init the values
365 Int_t nDim = nBinX - 1;
366 TMatrixD a(nDim,nDim);
369 Double_t* aA = a.GetMatrixArray();
370 Double_t* aB = b.GetMatrixArray();
371 memset(aA,0,nDim * nDim * sizeof(Double_t));
372 memset(aB,0,nDim * sizeof(Double_t));
373 //------------------------------------------
375 //------------------------------------------
376 // setup equation system
377 // width for 1st bin is given therefore
378 // we shift bin parameter (column) by one to the left
379 // to reduce the matrix size
381 Double_t* xAxis = new Double_t [nBinX + 1];
382 Double_t* binW = new Double_t [nBinX ];
383 binW[0] = firstBinWidth;
385 aB[0] = x[1] - x[0] - 0.5 * binW[0];
388 for(Int_t col = 1; col < nDim ; col ++)
391 aB[col] = x[col + 1] - x[ col ];
392 aA[row * nDim + col - 1 ] = 0.5;
393 aA[row * nDim + col ] = 0.5;
395 //------------------------------------------
397 //------------------------------------------
398 // solve the equations
401 //------------------------------------------
403 //------------------------------------------
404 // calculate the bin boundaries
405 xAxis[0] = x[0] - 0.5 * binW[0];
406 memcpy(&binW[1],c.GetMatrixArray(),nDim * sizeof(Double_t));
407 for(Int_t col = 0; col < nBinX ; col ++) {
408 xAxis[col + 1] = x[col] + 0.5 * binW[col];
410 //------------------------------------------
412 //------------------------------------------
413 // setup the final hist
414 result = new TH1D(myname.Data(),myname.Data(),nBinX, xAxis);
415 for(Int_t i = 0; i < nBinX; i ++){
416 result->SetBinContent(i + 1, y[i]);
418 result->SetMarkerColor(markercolor);
419 result->SetMarkerStyle(markerstyle);
420 result->SetMarkerSize(markersize);
421 //------------------------------------------
430 //__________________________________________
431 void AliHFEtools::BinParameterisation(const TF1 &fun, const TArrayD &xbins, TArrayD &bincontent){
433 // Calculate binned version of a function defined as the integral of x*f(x) in
434 // the integration range xmin,xmax, where xmin and xmax are the bin limits, divided
435 // by the binwidth. The function is important in case of steeply falling functions
438 // fun: the function to be binned
439 // xbins: the bin limits
440 // bincontent: the binned parameterisation
442 TString expression(Form("x*%s", fun.GetName()));
443 Double_t xmin(0), xmax(0);
444 fun.GetRange(xmin,xmax);
446 xmin = TMath::Min(xmin, xbins[0]);
447 xmax = TMath::Max(xmax, xbins[xbins.GetSize()-1]);
448 TF1 helper("helper",expression.Data(),xmin,xmax); // make function x*f(x)
449 if(bincontent.GetSize() != xbins.GetSize()-1)
450 bincontent.Set(xbins.GetSize()-1); // Adapt array to number of bins
452 for(Int_t ib = 0; ib < xbins.GetSize()-1; ib++){
455 bincontent[ib] = (helper.Integral(xmin, xmax))/(xmax - xmin);