How to draw a histogram with "/" in its name

[Marooz_Malik]

I have a .root file with histograms containing “/” in their name. I referred to this link:
https://root-forum.cern.ch/t/how-to-draw-an-object-with-special-characters-in-its-name/28248

but this is for TObject and I am not able use it for TH1

[dastudillo]

It’s clearer if you include some code that you have tried.

[Marooz_Malik]

void fit()


{  gStyle->SetOptStat(0);

   
 
   TFile *f11 = new TFile("digitrootobjects.root","read");
  // f11->ls();
   
  // get the list of keys
   TList *list = (TList *)f11->GetListOfKeys();
  
   TH1F *h1 = (TH1F *)list->FindObject("Cluster/ClsAmpCh");
  
  // TH1F *h1 = ((TKey *)key)->ReadObj();
 
   h1->Draw();
}

[dastudillo]

Does this work?

  TH1F *h1 = (TH1F *)list->FindObject(Form("%s","Cluster/ClsAmpCh"));

(by the way, make sure “Cluster/” is really part of the name of the histo, and not a directory).

[Marooz_Malik]

It is indeed name of the histo and the command gives an empty canvas.

[dastudillo]

Try

void fit()
{
  gStyle->SetOptStat(0); 
  TFile *f11 = new TFile("digitrootobjects.root","read");
  TH1F *h1 = (TH1F*)f11->FindObjectAny("Cluster/ClsAmpCh");
  h1->Draw();
}

[Marooz_Malik]

Thanks