Merging *nearly* identical TTrees

ROOT
1

Hi,

I have two .root files each containing a TTree (same name) and want to merge them. The structure is identical, except for one branch (that I don’t care about) that has a unique name in each file. I would like to merge the two TTrees except for the uninteresting branch. Is this possible without manually populating a new TTree?

Thanks,
Dan

ROOT Version: 6.08.06 (as it happens)
Platform: slc6
Compiler: Not Provided

2

Yes:

inputChain->SetBranchStatus(nameOfBranchInFirstFile, kFALSE);
TFile *outputFile = TFile::Open( ... );
TTree *outputTTree = inputChain->CloneTree(-1, "fast");
outputFile->Write();
delete outputFile;
3

Thank you, that did work. I was running up against an impenetrable segfault when following Rene’s TList instructions here: Merging TTrees on the fly

However, I think his instructions lacked a “= new TList()” which, when I added it, removed the segfault.

Thanks!
Dan

4

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