df021_createTGraph.py File Reference

Namespaces
namespace	df021_createTGraph

Detailed Description

Fill a TGraph using RDataFrame.

 
import ROOT
 
ROOT.ROOT.EnableImplicitMT(2)
d = ROOT.RDataFrame(160)
 
# Create a trivial parabola
dd = d.Alias("x", "rdfentry_").Define("y", "x*x")
 
graph = dd.Graph("x", "y")
 
# This tutorial is ran with multithreading enabled. The order in which points are inserted is not known, so to have a meaningful representation points are sorted.
c = ROOT.TCanvas()
graph.Sort()
graph.Draw("APL")
c.SaveAs("df021_createTGraph.png")
 
print("Saved figure to df021_createTGraph.png")

Date

July 2018

Authors

Enrico Guiraud, Danilo Piparo (CERN), Massimo Tumolo (Politecnico di Torino)

Definition in file df021_createTGraph.py.