> I'd like to create the tree like:
>
> Tree
> |
> 1 EventBody,Ntracks
> |
> 2 TrackBody,Ncnd
> |
> 3 CandidatBody,Nelements
> |
> 4 ElementBody
>
I use to work with different trees, one per level, to cope with problems
in which one has a multilevel tree structure with variable length branchs.
That allows easy links between them and, at least for version 1.09 where I
did my first tests, a much bigger compression factor than using
TClonesArrays. On the other hand one has to tune carefully the buffer
sizes of the branches in the different trees because that method seems to
be "punished" in what CPU consumption concerns.
It may be a "brute force" approach but is seems to work. It would be nice,
however, a container class for such kind of objects (a more general TTree
class) that could allow for individual filling of the branches controlling
the space ocuppied with a method like Fill(char *branchName) in order to
benefit from things like AutoSave.
Cheers,
Carlos
___________________________________________________________________
Carlos Lacasta
^^^^^^^^^^^^^^^ Division PPE
Inst. de Fisica Corpuscular (IFIC) Bat. 161 1-014
Avda. Dr. Moliner, 50 CERN
E-46100 Burjassot (Valencia) CH 1211 Meyrin/Geneve
Espanya Switzerland/Suisse
Tel.: +34 6 3864500 Tel.: +41 22 7673028
Fax.: +36 6 3864583 Fax.: +41 22 7677150
WWW : http://wwwcn.cern.ch/~lacasta
___________________________________________________________________
On Thu, 30 Apr 1998 valeri@na.infn.it wrote:
> Dear rooters,
>
>
> Thanks,
> Valeri Tyukov
>