df021_createTGraph¶

Fill a TGraph using RDataFrame.

Author: Enrico Guiraud, Danilo Piparo (CERN), Massimo Tumolo (Politecnico di Torino)
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Monday, March 27, 2023 at 09:46 AM.

In [1]:

ROOT::EnableImplicitMT(2);

ROOT::RDataFrame d(160);

Create a trivial parabola

In [2]:

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.

In [3]:

graph->Sort();
auto c = new TCanvas();
graph->DrawClone("APL");

Draw all canvases

In [4]:

gROOT->GetListOfCanvases()->Draw()