Re: TTree inside TDirectoryFile

From: Marc Escalier <escalier_at_lal.in2p3.fr>
Date: Sat, 14 May 2011 16:22:18 +0200

thanks

i make some tests and will reply

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On Sat, 14 May 2011, Benjamin Stieger wrote:

> Hi Marc,
> Did you try to change the construction of your second TChain?
>
> TChain *tree_BunchConfTree_source_full = new
> TChain("photonMeta/BunchConfTree");
>
> That works for me when making a chain of trees in subdirectories, but
> no idea if it helps in your case.
>
> Cheers,
> Benjamin
>
>
> On Sat, May 14, 2011 at 11:26 AM, Marc Escalier <escalier_at_lal.in2p3.fr> wrote:
>> Hello,
>>
>> in the context of a program of skimming=reducing of the content of a file
>> for those events that pass a given property
>> (which works fine but is too long/complex to be reproduced here),
>>
>> the file to be skimmed, contains :
>> -in the root directory (baseline) : a given Tree "photon" : this works fine
>> -in a subdirectory of the root file : TDirectoryFile "photonMeta", a given
>> TTree "BunchConfTree"
>>
>> for the moment, i use this :
>>
>>  TChain *tree_photon_source_full=new TChain("photon");
>>  TChain *tree_BunchConfTree_source_full=new TChain("BunchConfTree");
>>
>>  for (int iFile=0; iFile<fileList.size(); iFile++) {
>>    const char* filePath = fileList[iFile].c_str();
>>    tree_photon_source_full->Add(filePath);
>>    tree_BunchConfTree_source_full->Add(filePath); <------problem here
>>  }
>>
>> but i don't know how to express the fact that the tree BuncConfTree is
>> inside a subdirectory of the root file
>> for the instructions above
>>
>> -->would you have a hint to make the "link" between the tree and the
>> subdirectory photonMeta so that it could
>> read the content ?
>>
>> (bonus if time available) :
>> at the end, when filling the tree that pass the cuts, i use :
>>
>>      tree_photon_source_full->GetEntry(ievt);
>>      tree_photon_destination->Fill();
>>
>>      tree_BunchConfTree_source_full->GetEntry(ievt);
>>      tree_BunchConfTree_destination->Fill();
>>
>> -->how to create a subdirectory : TDirectoryFile "photonMeta" a save the
>> tree "BunchConfTree"
>> only in this directory (while keeping the other in the main directory) ?
>> ( in order to respect the format of the original file)
>>
>> for the moment, i use :
>>  file_destination=tree_photon_destination->GetCurrentFile();
>>  file_destination->Write();
>>  file_destination->Close();
>>
>> thanks
>>
>>
>
Received on Sat May 14 2011 - 16:22:23 CEST