df000_simple.py File Reference

Detailed Description

Simple RDataFrame example in Python.

This tutorial shows a minimal example of RDataFrame. It starts without input data, generates a new column x with random numbers, and finally draws a histogram for x.

 
import ROOT
 
# Create a data frame with 100 rows
rdf = ROOT.RDataFrame(100)
 
# Define a new column `x` that contains random numbers
rdf_x = rdf.Define("x", "gRandom->Rndm()")
 
# Create a histogram from `x` and draw it
h = rdf_x.Histo1D("x")
h.Draw()

Date

September 2021

Author

Enric Tejedor (CERN)

Definition in file df000_simple.py.