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)
59 // check Ncontributors, if <0 it means error *gna*
64 //____________________________________________________________________
65 Bool_t AliPWG0Helper::IsPrimaryCharged(TParticle* aParticle, Int_t aTotalPrimaries, Bool_t adebug)
68 // this function checks if a particle from the event generator (i.e. among the nPrim particles in the stack)
69 // shall be counted as a primary particle
71 // This function or a equivalent should be available in some common place of AliRoot
74 // if the particle has a daughter primary, we do not want to count it
75 if (aParticle->GetFirstDaughter() != -1 && aParticle->GetFirstDaughter() < aTotalPrimaries)
78 printf("Dropping particle because it has a daughter among the primaries.\n");
82 Int_t pdgCode = TMath::Abs(aParticle->GetPdgCode());
84 // skip quarks and gluon
85 if (pdgCode <= 10 || pdgCode == 21)
88 printf("Dropping particle because it is a quark or gluon.\n");
92 if (strcmp(aParticle->GetName(),"XXX") == 0)
95 printf("WARNING: There is a particle named XXX.\n");
99 TParticlePDG* pdgPart = aParticle->GetPDG();
101 if (strcmp(pdgPart->ParticleClass(),"Unknown") == 0)
104 printf("WARNING: There is a particle with an unknown particle class (pdg code %d).\n", pdgCode);
108 if (pdgPart->Charge() == 0)
111 printf("Dropping particle because it is not charged.\n");
118 //____________________________________________________________________
119 void AliPWG0Helper::CreateProjections(TH3* hist, Bool_t save)
121 // create projections of 3d hists to all 2d combinations
122 // the histograms are not returned, just use them from memory or use this to create them in a file
124 TH1* proj = hist->Project3D("yx");
125 proj->SetXTitle(hist->GetXaxis()->GetTitle());
126 proj->SetYTitle(hist->GetYaxis()->GetTitle());
130 proj = hist->Project3D("zx");
131 proj->SetXTitle(hist->GetXaxis()->GetTitle());
132 proj->SetYTitle(hist->GetZaxis()->GetTitle());
136 proj = hist->Project3D("zy");
137 proj->SetXTitle(hist->GetYaxis()->GetTitle());
138 proj->SetYTitle(hist->GetZaxis()->GetTitle());
143 //____________________________________________________________________
144 void AliPWG0Helper::CreateDividedProjections(TH3* hist, TH3* hist2, const char* axis, Bool_t putErrors, Bool_t save)
146 // create projections of the 3d hists divides them
147 // axis decides to which plane, if axis is 0 to all planes
148 // the histograms are not returned, just use them from memory or use this to create them in a file
152 CreateDividedProjections(hist, hist2, "yx", putErrors, save);
153 CreateDividedProjections(hist, hist2, "zx", putErrors, save);
154 CreateDividedProjections(hist, hist2, "zy", putErrors, save);
159 TH1* proj = hist->Project3D(axis);
161 if (strlen(axis) == 2)
163 proj->SetYTitle(GetAxisTitle(hist, axis[0]));
164 proj->SetXTitle(GetAxisTitle(hist, axis[1]));
166 else if (strlen(axis) == 1)
167 proj->SetXTitle(GetAxisTitle(hist, axis[0]));
169 TH1* proj2 = hist2->Project3D(axis);
170 if (strlen(axis) == 2)
172 proj2->SetYTitle(GetAxisTitle(hist2, axis[0]));
173 proj2->SetXTitle(GetAxisTitle(hist2, axis[1]));
175 else if (strlen(axis) == 1)
176 proj2->SetXTitle(GetAxisTitle(hist2, axis[0]));
178 TH1* division = dynamic_cast<TH1*> (proj->Clone(Form("%s_div_%s", proj->GetName(), proj2->GetName())));
179 //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()));
180 //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()));
181 division->Divide(proj, proj2, 1, 1, "B");
182 division->SetTitle(Form("%s divided %s", proj->GetTitle(), proj2->GetTitle()));
187 if (division->GetDimension() == 1)
189 Int_t nBins = division->GetNbinsX();
190 for (Int_t i = 1; i <= nBins; ++i)
191 if (proj2->GetBinContent(i) != 0)
192 division->SetBinError(i, TMath::Sqrt(proj->GetBinContent(i)) / proj2->GetBinContent(i));
194 else if (division->GetDimension() == 2)
196 Int_t nBinsX = division->GetNbinsX();
197 Int_t nBinsY = division->GetNbinsY();
198 for (Int_t i = 1; i <= nBinsX; ++i)
199 for (Int_t j = 1; j <= nBinsY; ++j)
200 if (proj2->GetBinContent(i, j) != 0)
201 division->SetBinError(i, j, TMath::Sqrt(proj->GetBinContent(i, j)) / proj2->GetBinContent(i, j));
213 //____________________________________________________________________
214 const char* AliPWG0Helper::GetAxisTitle(TH3* hist, const char axis)
216 // returns the title of the axis given in axis (x, y, z)
219 return hist->GetXaxis()->GetTitle();
220 else if (axis == 'y')
221 return hist->GetYaxis()->GetTitle();
222 else if (axis == 'z')
223 return hist->GetZaxis()->GetTitle();