Put a name on TChain ?

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• Previous message: Valery Fine: "Re: need help.."

Why chains do not have their own name ? It is thus impossible to access
them via
gROOT->FindObject().

Here's my problem. I would like to have a macro that create a chain, and
then
at the prompt line I would like to play with this chain :

void macro(Int_t i1, Int_t i2) {
...
TChain* chain = new TChain("thetreename");
for (i=i1;i<=i2;i++) chain->Add(filename[i]) ;
}

root[1] .x macro.C(702,781)
root[2] TChain* p=(TChain*)gROOT->FindObject("thetreename");
root[3] ...play with p...

It seems to me that of course in line 2, it's the tree object that will
be found. Why
not a chain constructor like TChain::TChain(char* chainname, char*
treename) ?

Thanks.

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APHECETCHE Laurent (mailto:aphecetche@ganil.fr)       
GANIL, B.P. 5027, 14076, Caen Cedex 5, France 
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• Previous message: Valery Fine: "Re: need help.."