I know that if I have a TTree*, and I would like to draw a corresponding variable, let’s say “X”, of that TTree with a cut, I can do the following.
What I would like to do is exactly this, but for a multitude of root files each with the TTree “tree”, and on the same canvas. I planned on doing this by making a TChain initialized with “tree”, add all of my desired root files to that TChain, and then do a simple Draw() function of the variable “X”, which is in each “tree”, with a condition. Suppose that condition is that all values of the variable “Y” be greater than 5, so that “Y>5.” is the condition.
This is how I’ve attempted it.
TChain* chain = new TChain("tree"); chain->Add("/directory/*.root"); TCanvas* canv = new TCanvas("canv","plot",1); chain->Draw("X","Y>5.");
This, however, doesn’t seem to be working. The plot is made, but the cut seems to just be skipped.
Could you tell me the correct way to do this?