I have an ntuple with a couple of leaves in a tree. I want to write a C file to make a graph using two leaves for the x and y axis, by utilising , but I don’t know how to point to the leaves in the tree.
Touqra,
To accomplish your task, you have to
- open a TFile
- get the TTree
- assign the address of your class to the appropriate branch
- loop over the events in the branch and assign to x and y vector
All these steps are extensively documented in examples in
tutorials/tree . What is not clear ?
Eddy