3 #include <AliPWG0Helper.h>
6 #include <TParticlePDG.h>
12 #include <AliESDVertex.h>
14 //____________________________________________________________________
15 ClassImp(AliPWG0Helper)
17 //____________________________________________________________________
18 Bool_t AliPWG0Helper::IsEventTriggered(AliESD* aEsd)
20 // check if the event was triggered
22 // this function needs the branch fTriggerMask
25 // ITS_SPD_GFO_L0 : 32
29 ULong64_t triggerMask = aEsd->GetTriggerMask();
31 if (triggerMask&32 && ((triggerMask&1) || (triggerMask&2)))
37 //____________________________________________________________________
38 Bool_t AliPWG0Helper::IsVertexReconstructed(AliESD* aEsd)
40 // checks if the vertex is reasonable
42 // this function needs the branches fSPDVertex*
45 const AliESDVertex* vtxESD = aEsd->GetVertex();
47 // the vertex should be reconstructed
48 if (strcmp(vtxESD->GetName(), "default")==0)
52 vtx_res[0] = vtxESD->GetXRes();
53 vtx_res[1] = vtxESD->GetYRes();
54 vtx_res[2] = vtxESD->GetZRes();
56 if (vtx_res[2]==0 || vtx_res[2]>0.1)
62 //____________________________________________________________________
63 Bool_t AliPWG0Helper::IsPrimaryCharged(TParticle* aParticle, Int_t aTotalPrimaries, Bool_t adebug)
66 // this function checks if a particle from the event generator (i.e. among the nPrim particles in the stack)
67 // shall be counted as a primary particle
69 // This function or a equivalent should be available in some common place of AliRoot
72 // if the particle has a daughter primary, we do not want to count it
73 if (aParticle->GetFirstDaughter() != -1 && aParticle->GetFirstDaughter() < aTotalPrimaries)
76 printf("Dropping particle because it has a daughter among the primaries.\n");
80 Int_t pdgCode = TMath::Abs(aParticle->GetPdgCode());
82 // skip quarks and gluon
83 if (pdgCode <= 10 || pdgCode == 21)
86 printf("Dropping particle because it is a quark or gluon.\n");
90 if (strcmp(aParticle->GetName(),"XXX") == 0)
93 printf("WARNING: There is a particle named XXX.\n");
97 TParticlePDG* pdgPart = aParticle->GetPDG();
99 if (strcmp(pdgPart->ParticleClass(),"Unknown") == 0)
102 printf("WARNING: There is a particle with an unknown particle class (pdg code %d).\n", pdgCode);
106 if (pdgPart->Charge() == 0)
109 printf("Dropping particle because it is not charged.\n");
116 //____________________________________________________________________
117 void AliPWG0Helper::CreateProjections(TH3* hist, Bool_t save)
119 // create projections of 3d hists to all 2d combinations
120 // the histograms are not returned, just use them from memory or use this to create them in a file
122 TH1* proj = hist->Project3D("yx");
123 proj->SetXTitle(hist->GetXaxis()->GetTitle());
124 proj->SetYTitle(hist->GetYaxis()->GetTitle());
128 proj = hist->Project3D("zx");
129 proj->SetXTitle(hist->GetXaxis()->GetTitle());
130 proj->SetYTitle(hist->GetZaxis()->GetTitle());
134 proj = hist->Project3D("zy");
135 proj->SetXTitle(hist->GetYaxis()->GetTitle());
136 proj->SetYTitle(hist->GetZaxis()->GetTitle());
141 //____________________________________________________________________
142 void AliPWG0Helper::CreateDividedProjections(TH3* hist, TH3* hist2, const char* axis, Bool_t putErrors, Bool_t save)
144 // create projections of the 3d hists divides them
145 // axis decides to which plane, if axis is 0 to all planes
146 // the histograms are not returned, just use them from memory or use this to create them in a file
150 CreateDividedProjections(hist, hist2, "yx", putErrors, save);
151 CreateDividedProjections(hist, hist2, "zx", putErrors, save);
152 CreateDividedProjections(hist, hist2, "zy", putErrors, save);
157 TH1* proj = hist->Project3D(axis);
159 if (strlen(axis) == 2)
161 proj->SetYTitle(GetAxisTitle(hist, axis[0]));
162 proj->SetXTitle(GetAxisTitle(hist, axis[1]));
164 else if (strlen(axis) == 1)
165 proj->SetXTitle(GetAxisTitle(hist, axis[0]));
167 TH1* proj2 = hist2->Project3D(axis);
168 if (strlen(axis) == 2)
170 proj2->SetYTitle(GetAxisTitle(hist2, axis[0]));
171 proj2->SetXTitle(GetAxisTitle(hist2, axis[1]));
173 else if (strlen(axis) == 1)
174 proj2->SetXTitle(GetAxisTitle(hist2, axis[0]));
176 TH1* division = dynamic_cast<TH1*> (proj->Clone(Form("%s_div_%s", proj->GetName(), proj2->GetName())));
177 //printf("doing axis: %s, x axis has %d %d bins, min %f %f max %f %f\n", axis, division->GetNbinsX(), proj2->GetNbinsX(), division->GetXaxis()->GetBinLowEdge(1), proj2->GetXaxis()->GetBinLowEdge(1), division->GetXaxis()->GetBinUpEdge(division->GetNbinsX()), proj2->GetXaxis()->GetBinUpEdge(proj2->GetNbinsX()));
178 //printf("doing axis: %s, y axis has %d %d bins, min %f %f max %f %f\n", axis, division->GetNbinsY(), proj2->GetNbinsY(), division->GetYaxis()->GetBinLowEdge(1), proj2->GetYaxis()->GetBinLowEdge(1), division->GetYaxis()->GetBinUpEdge(division->GetNbinsY()), proj2->GetYaxis()->GetBinUpEdge(proj2->GetNbinsY()));
179 division->Divide(proj2);
180 division->SetTitle(Form("%s divided %s", proj->GetTitle(), proj2->GetTitle()));
185 if (division->GetDimension() == 1)
187 Int_t nBins = division->GetNbinsX();
188 for (Int_t i = 1; i <= nBins; ++i)
189 if (proj2->GetBinContent(i) != 0)
190 division->SetBinError(i, TMath::Sqrt(proj->GetBinContent(i)) / proj2->GetBinContent(i));
192 else if (division->GetDimension() == 2)
194 Int_t nBinsX = division->GetNbinsX();
195 Int_t nBinsY = division->GetNbinsY();
196 for (Int_t i = 1; i <= nBinsX; ++i)
197 for (Int_t j = 1; j <= nBinsY; ++j)
198 if (proj2->GetBinContent(i, j) != 0)
199 division->SetBinError(i, j, TMath::Sqrt(proj->GetBinContent(i, j)) / proj2->GetBinContent(i, j));
211 //____________________________________________________________________
212 const char* AliPWG0Helper::GetAxisTitle(TH3* hist, const char axis)
214 // returns the title of the axis given in axis (x, y, z)
217 return hist->GetXaxis()->GetTitle();
218 else if (axis == 'y')
219 return hist->GetYaxis()->GetTitle();
220 else if (axis == 'z')
221 return hist->GetZaxis()->GetTitle();