Hi, I’m trying to delete a few histograms in my rootfile, to hadd it with another smaller rootfile with the correct histograms, this is what I do: TFile *f = TFile::Open(“NTUP_PILEUP.pool.root.1”,“update”); f->cd(“PileupReweighting”) f->Delete(“pileup_TH1”); So it’s not complaining but it does…

The “delete f;” will “close” the opened file (and cleanup RAM). [image] Aux;1 aux;2 aux3; ROOT Search for “cycle” and/or “namecycle”, for example in: In a Nutshell: Input and Output . ROOT User’s Guide: Input/Output : Retrieving Objects from Disk , Subdirector…

Wile_E_Coyote November 23, 2019, 3:41pm 4

The “delete f;” will “close” the opened file (and cleanup RAM).

Delete TH1 from rootfile