Getting keyword substitution to work.

[u/mrichter/AliRoot.git] / JETAN / AliAnalysisTaskDiJets.cxx

diff --git a/JETAN/AliAnalysisTaskDiJets.cxx b/JETAN/AliAnalysisTaskDiJets.cxx
index 65e7b8a187b88e2f28c73eefefb1bc204392b009..76c3e0acd253863e76342c4d68e45a8e398d7ced 100644 (file)
--- a/JETAN/AliAnalysisTaskDiJets.cxx
+++ b/JETAN/AliAnalysisTaskDiJets.cxx
@@ -183,15 +183,18 @@ void AliAnalysisTaskDiJets::UserExec(Option_t */*option*/)
     AliAODJet* jet2 = (AliAODJet*) (jets->At(1));
     TLorentzVector v2 = *(jet2->MomentumVector());
     TLorentzVector v = v1 + v2;
-    Int_t ndi = fDiJets->GetEntriesFast();
-    TClonesArray &lref = *fDiJets;
-    new(lref[ndi]) AliAODDiJet(v);
-    AliAODDiJet* dijet = (AliAODDiJet*) (fDiJets->At(ndi));
-    dijet->SetJetRefs(jet1, jet2);
+    if (fDiJets) {
+       Int_t ndi = fDiJets->GetEntriesFast();
+       TClonesArray &lref = *fDiJets;
+       new(lref[ndi]) AliAODDiJet(v);
+       AliAODDiJet* dijet = (AliAODDiJet*) (fDiJets->At(ndi));
+       dijet->SetJetRefs(jet1, jet2);
+       fH1DeltaPhi->Fill(dijet->DeltaPhi());
+       fH1PhiImbal->Fill(dijet->PhiImbalance());
 
+    }
+    
     fH1DeltaPt->Fill(jet1->Pt()-jet2->Pt());
-    fH1DeltaPhi->Fill(dijet->DeltaPhi());
-    fH1PhiImbal->Fill(dijet->PhiImbalance());
     fH1Asym->Fill((jet1->Pt()-jet2->Pt())/(jet1->Pt()+jet2->Pt()));
     fH2Pt2vsPt1->Fill(jet1->Pt(),jet2->Pt());
     fH2DifvsSum->Fill(jet1->Pt()+jet2->Pt(),jet1->Pt()-jet2->Pt());