Create data from scratch with RDataFrame.
This tutorial shows how to create a dataset from scratch with RDataFrame
Author: Danilo Piparo (CERN)
This notebook tutorial was automatically generated with ROOTBOOK-izer from the macro found in the ROOT repository on Wednesday, April 17, 2024 at 11:07 AM.
We create an empty data frame of 100 entries
ROOT::RDataFrame df(100);
We now fill it with random numbers
gRandom->SetSeed(1);
auto df_1 = df.Define("rnd", []() { return gRandom->Gaus(); });
And we write out the dataset on disk
df_1.Snapshot("randomNumbers", "df008_createDataSetFromScratch.root");