Hi Matthieu,
Your example must work. It is a variant of our standard example
in $ROOTSYS/tutorials/h1analysis.C
Your example does not use Tree Friends. It should also work
with Friends.
Rene Brun
On Tue, 9 Oct 2001, Matthieu Guillo wrote:
> Hi Rooters,
>
> I would like to be sure of the behavior of a TEventList object when
> applied to a TChain.
>
> For instance if I have:
>
> TChain chain("tree");
> chain.Add("monbeau.root");
> chain.Add("sapinroi.root");
> chain.Add("desforets.root");
>
> TCut neutron_cut = "(missppp.M2()>0.713)&&(missppp.M2()<0.974)";
> tree->Draw(">> neutron_select", neutron_cut);
> TEventList* neutron_select = (TEventList*) gDirectory->Get("neutron_select");
>
> tree->SetEventList(neutron_select);
> tree->Draw("pp.M2()");
>
>
> Does this work? I read somewhere in the ROOT talks that with tree friends
> this can be a trouble, but what about TChain?
>
> I am using ROOT 3.02
>
> Thanks
>
> Matthieu Guillo
> University of South Carolina
> Thomas Jefferson National Laboratory
> Office 71 trailer 16
> Phone: 757-269-5551
>
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