Re: Need help with TTree::Print() output

Rene Brun (Rene.Brun@cern.ch)
Fri, 17 Apr 1998 12:18:01 +0200


Manuel Sanchez Garcia wrote:
>
> Hi Rooters,
>
> The problem is the following:
>
> I am creating a TTree with many branches, most of them added by hand
> using TBranch::GetListOfBranches()->Add(...), once the tree is created i
> fill it with some data.
>
> Then i've used TTree::Print() for debugging; in the output of the
> tree and i get some branches with "Total size=0" and "Baskets=0", so i
> thought the data were not stored. However if i do a histogram (with
> TTree::Draw()) the data are there and they seem to be right (i get the
> expected histogram...)
>
> Am i missunderstunding the info given by TTree::Print()?, if not,
> What do you think the problem can be?
>

The result is correct. It is simply a convention.
In case the number of baskets is 0, the total size does not include
the current buffer in memory.

Rene Brun