Questions about TTree.

From: Maurik Holtrop (maurik.holtrop@unh.edu)
Date: Wed Jun 24 1998 - 19:48:55 MEST


Dear Root Experts,

I am in the process of designing the layout of an event structure using
TTree that has a large amount of data in various sub-groups. (This is for
the CLAS detector, right now CLAS uses BOS banks.) I would ideally like most
of this data to be directly accessible from a TBrowser. I get quite close to
what I want using the Event.cxx example, however, I stumble upon the
following questions:

1) Is there any way in which the branches can be split deeper that 1 level,
so that the data of sub objects are stored in their own baskets ?
  (Tree->Branch(....,split=1) only splits object one level deep, I'd like 3
deep which would allow for a much more clear organization of the data.)

2) How can I call a member function of a class from one of the objects in
the tree, using TTree::Draw() ?
  (T->Draw("fTrack.GetPx()") of the example does not work, even when the
libEvent.so is loaded.)

Thank you very much,

	Maurik

P.S. I run Root 2.00/8 on Linux.

-- 
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 Maurik Holtrop              web: http://www.physics.unh.edu/Maurik
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