I am trying to retrieve a piped histogram from a tree in a macro. I do:
And then, I tried the various possiblities below:
TH2D* h1 = (TH2D*)gPad->GetPrimitive(“h1”);
TH2D* h1 = (TH2D*)gDirectory->Get(“h1”);
(and the same with TH2D -> TH2F because i am not sure of what
is created in this case).
But i didnt succeed to get a valid pointer h1.
Any hint ?