Re: Object types

From: Rene Brun (Rene.Brun@cern.ch)
Date: Thu Dec 11 1997 - 17:35:13 MET


zvyagin@gams.ihep.su wrote:

> Hi!
>
> I want to store object of class MYCLASS in one TTree branch.
> What object types my class MYCLASS can contain?
>
> class MYCLASS : public TObject
> {
>   Obj1   o1;
>   Obj2   o2;
>   // ....
> };
>
> >From the example $ROOTSYS/test/Event.h this objects Obj1,Obj2,... are:
>    Int_t,UInt_t,Float_t,....
>    TClonesArray
>    TH1F*
>
> What is about TArray, TLeaf?
> Is it possible to have Int_t[] (with non-constant length) in MYCLASS or I
> should create TClonesArray of Int_t?
>
> Thanks,
> Alexander Zvyagin.

  The rules to create a Tree and its branch(es) are explained at URL:
     http://root.cern.ch/root/HowtoWriteTree.html

see in particular the section "Making a Tree with many branches"

Rene Brun



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