Re: About retrieving TTrees from a file

On Monday 16 November 2009 10:25 PM, Rene Brun wrote:
> 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.

Thanks Rene! My files are about 1.8 gigs, that is probably why I see this. That was very helpful. :)

>
> 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
>

-- 
Suvayu

Open source is the future. It sets us free.