Hi Charles, You can do this in principle, using TBranchElement::Branch. Note that 2 levels branches are automatically created when using a TClonesArray (and soon STL vectors and list). See also TFolder and TTree::Branch(const char* folder,..) However, we try to discourage people doing multi-level branches for other cases to avoid a fragmentation of the data base. Rene Brun Charles Leggett wrote: > > Is it possible to manually create a subbranch of a branch within a tree? > ie, a structure like: > > tree > / \ > / \ > branch1 branch2 > / \ / \ > / \ / \ > b1.1 b1.2 b2.1 b2.2 > /\ /\ /\ /\ > leafs > > I couldn't figure out how to do this from the docs. > > thanks... Charles. > > -- > +---------------------------------------------------------------------+ > | Charles Leggett | CGLeggett@lbl.gov | > | Lawrence Berkeley National Lab | HCG / NERSC : Atlas | > | 1 Cyclotron Road, MS 50B-3238 | | > | Berkeley, CA 94720 | Eagles may soar, but weasels don't | > | (510) 495-2930 room: 50B-3201 | get sucked into jet engines. | > +------------------- http://annwm.lbl.gov/~leggett -------------------+
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