df021_createTGraph.C File Reference

Detailed Description

This tutorial shows how to fill a TGraph using the Dataframe.

 
 
 
void df021_createTGraph()
{
   ROOT::EnableImplicitMT(2);
 
   ROOT::RDataFrame d(160);
 
   // Create a trivial parabola
   auto dd = d.Alias("x", "rdfentry_").Define("y", "x*x");
 
   auto 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.
   graph->Sort();
   auto c = new TCanvas();
   graph->DrawClone("APL");
}

Date

July 2018

Author

Enrico Guiraud, Danilo Piparo, Massimo Tumolo

Definition in file df021_createTGraph.C.