Hi Root,
I think I am beginning to understand Rene's comment that it would be
better if I created a simple event class to handle my Tree filling
tasks [see the thread I started about two weeks ago]. All the Event
class examples I have seen so far are filling TClonesArrays of Tracks.
The question: something about the name Clone suggests to me that my
objects will lose their identity if I make them part of a
TClonesArray; that is I would not be able to associate a particular
member name with that object later on. I want to be able to say
something like T->Draw("ppsi.Mag()") So it would appear that I should
not use a TClonesArray since I want to know easily which particle is
which in later analysis (and since there are not many particles
produced).
Also, suppose I have some TLorentzVector objects which for some events
are present, but others not. How do I prevent old values from showing
up in the tree? Can I just set the object equal to zero (as some of
the examples seem to do with unitialized objects)?
Thanks for any help.
Jeff
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