Hello everybody,
Does someone know whether it is possible to delete a branch of a Tree (or select particular branches in a tree) in order to have the same tree but in which this special branch would be removed ?
Thank you very much in advance,
Jerome
Hi,
We do not support deleting a branch from an existing TTree (and anyway the space in the file would not be reclaimed even if we did). Instead we recommend to partially clone the TTree:TFile *input = TFile::Open("input.root");
TTree *inputtree; input->GetObject("tree",inputtree);
TFile *output = TFile::Open("output.root","RECREATE");
inputtree->SetBranchStatus("indesirable_branch.*",0);
TTree *outputtree = inputtree->CloneTree(-1,"fast");
output->Write();
delete input;
delete output;
Cheers,
Philippe.