Re: Using stored class member funcs in TTrees

From: Gene Van Buren (gene@bnl.gov)
Date: Wed Mar 08 2000 - 23:28:07 MET 

I found out why TTree was returning zeros for the
results of using member functions of my class
in TTree::Draw() and Scan() calls:

I used "float" instead of "Float_t" for the return
value of the member function. TTreeFormula
interpreted "float" as being something whose
value it could not return.

On a side note, it does appear that Scan() is
not as stringent as Draw() for determining
the validity of a TLeaf name. If I give it a
bogus name, Scan() just chugs away with
garbage returned.

-Gene Van Buren

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