tdf008_createDataSetFromScratch.C File Reference

Detailed Description

This tutorial shows how to create a dataset from scratch with TDataFrame

void tdf008_createDataSetFromScratch()
{
   // We create an empty data frame of 100 entries
   ROOT::Experimental::TDataFrame tdf(100);

   // We now fill it with random numbers
   TRandom3 rnd(1);
   auto tdf_1 = tdf.Define("rnd", [&rnd](){return rnd.Gaus();});

   // We plot these numbers
   auto hgaus = tdf_1.Histo1D("rnd");

   // And we write out the dataset on disk
   tdf_1.Snapshot("randomNumbers", "tdf008_createDataSetFromScratch.root");

}

Date

June 2017

Author

Danilo Piparo

Definition in file tdf008_createDataSetFromScratch.C.