Dispay Event Vertex position

AliAnalysisTaskMyTask.cxx

@@ -29,6 +29,7 @@
 #include "AliAnalysisTaskMyTask.h"
 #include "AliESDtrack.h"
 #include "Riostream.h"
+#include "AliESDVertex.h"
 
 
 Int_t esd_event_id = 0; // global variable to store unique event id
@@ -126,8 +127,12 @@ void AliAnalysisTaskMyTask::UserExec(Option_t *)
 
     Int_t iTracks(fESD->GetNumberOfTracks());           // see how many tracks there are in the event
 
+    Double_t vX = fESD->GetPrimaryVertex()->GetX();
+    Double_t vY = fESD->GetPrimaryVertex()->GetY();
+    Double_t vZ = fESD->GetPrimaryVertex()->GetZ();
+
     // Add Event details to summaryfile and eventsdetail
-    summaryfile << " Event " << esd_event_id << ": iTracks = "  << iTracks << endl;
+    summaryfile << " Event " << esd_event_id << ": iTracks = "  << iTracks << "  Vertex: X = " << vX << " Y = " << vY << " Z = " << vZ << endl;
     eventsdetail << "********** Event " << esd_event_id << ": iTracks = "  << iTracks << " **********" << endl;
 
     for(Int_t i(0); i < iTracks; i++) {                 // loop ove rall these tracks