Hi,
I would like to redirect a branch with some contraints into an existing histogram as in cint
I have a tree called rootTree with several branches and would like to script the creation of plots including some constraints. Thus, I tried to create a histogram with the right binning and redirect the drawn branch into it like with CINT – however the histogram stays empty
import ROOT
canvas = ROOT.TCanvas("canvas","Canvas Title")
canvas.cd()
histo = ROOT.TH1D("histo","test",100,0.,30.)
rootTree.Draw("myBranch>>histo","anotherBranch==1")
histo.Draw()
canvas.Update()
canvas.Print("foo.pdf" )
Is there a way to draw the branch into my histogram?
Cheers and thanks for ideas,
Thomas