Hi Francesco,
see Users Guide page 249.
example:
root [0] gSystem.Load("libPhysics")
root [1] TLorentzVector::Class()->IgnoreTObjectStreamer()
root [2] TTree T("T","test")
root [3] TClonesArray *c = new TClonesArray("TLorentzVector")
root [4] T.Branch("e","TClonesArray",&c)
root [5] T.Print()
Rene Brun
Perfetto Francesco wrote:
>
> Hi,
>
> I use root 3.05/07 on linux 2.4.18-18.7.x.cern Red Hat 7.3 (Valhalla)
>
> My problem is that after run my program of analysis in which there are
> TLorentzVector and TCloneArray:
>
> ...
>
> TClonesArray *p4_pi_ini_recA = new TClonesArray("TLorentzVector", 3);
> TClonesArray *p4_ph_ini_recA = new TClonesArray("TLorentzVector", 7);
>
> TLorentzVector *p4_eta_gen = new TLorentzVector();
> TLorentzVector *p4_eta_fin = new TLorentzVector();
>
> TTree *res = new TTree("res","res di prova");
>
> res->Branch("p4_ph_ini_recA." ,"TClonesArray" ,&p4_ph_ini_recA,32000,99);
> res->Branch("p4_pi_ini_recA." ,"TClonesArray" ,&p4_pi_ini_recA,32000,99);
>
> res->Branch("p4_eta_gen." ,"TLorentzVector",&p4_eta_gen);
> res->Branch("p4_eta_fin." ,"TLorentzVector",&p4_eta_fin);
>
> ...
>
> when I open the browser, with the right variable (leaf) "p4_eta_fin.fE"
> and (branch) "p4_eta_fin.fP" there is too the variable (branch)
> "p4_eta_fin.TObject" that I haven't create and I would like that it not
> exist. clicking on "p4_eta_fin.TObject", I see two leaf
> "p4_eta_fin.TObject.fBits" and "p4_eta_fin.TObject.fUniqueID".
> Same for the p4_eta_fin_fP.fBits and ...fP.fUniqueID
>
> What is it ?
> why there is this leaf (branch) ?
> how can I do to haven't this ?
>
> Thanks
> Francesco.
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