Re: About retrieving TTrees from a file

There is no problem with your files. In the latest ones, you have more data or the frequency to call TTre::AutoSave has been increased. see doc of TTree::AutoSave.

Rene Brun

Suvayu Ali wrote:
> Hi ROOTers,
>
> Recently I generated some flat Ntuples using the Ntuplemaker package
> in ATHENA. The same package had earlier generated Ntuples like this,
>
>> root [5] _file1->ls()
>> TFile**
>> /cluster/data01/suvayu/ttbar.dilep.ntuple/mc08.105600.Pythia_Zprime_tt1000.detailed.root
>>
>> TFile*
>> /cluster/data01/suvayu/ttbar.dilep.ntuple/mc08.105600.Pythia_Zprime_tt1000.detailed.root
>>
>> KEY: AttributeListLayout Schema;1
>> KEY: TTree CollectionTree;1 CollectionTree
>
> The latest root files I generated looks like this.
>
>> root [3] _file0->ls()
>> TFile**
>> /cluster/data01/suvayu/ttbar.dilep.ntuple/mc08.105592.1TeV/detailedAOD.AAN.root
>>
>> TFile*
>> /cluster/data01/suvayu/ttbar.dilep.ntuple/mc08.105592.1TeV/detailedAOD.AAN.root
>>
>> OBJ: TTree CollectionTree CollectionTree : 0 at: 0x87c8828
>> KEY: AttributeListLayout Schema;1
>> KEY: TTree CollectionTree;43 CollectionTree
>> KEY: TTree CollectionTree;42 CollectionTree
>
> These two trees are exactly the same when I plot any of the objects in
> there. I know this is not directly related to ROOT but still could any
> one shed some light on this?
>
> TIA
Received on Tue Nov 17 2009 - 07:25:19 CET