Cannot delete a histo from file

ROOT
1

Hi

I am trying to delete a histo in a file - I ve read already Deleting a histogram within a root file but it does not help…

[code]root -l file.root

_file0->ls()
KEY: TH1F histo_example;1 example Histo

[/code]
then I try

[code]gDirectory->Delete(“histo_example;1”);
or
_file0->Delete(“histo_example;1”);

_file0->ls()
KEY: TH1F histo_example;1 example Histo[/code]

What I am doing wrong ?

thanks

Alex

2

Hi

An Update

This kind of recipe

was not working… Instead this works (my histos are are not located inside a dir rather thatn the top dir

TFile* file = new TFile("myfile.root", "update"); file->Delete("Histo;1"); file->Close();

Cheers

Alex