RNTuple tutorials

Various examples demonstrating ROOT's RNTuple columnar I/O subsystem.

RNTuple is the evolution of TTree, offering better performance and new, more robust interfaces. It additionally comes with a binary format specification, which can be found here. The tutorials and examples on this page demonstrate how the RNTuple interface can be used for various use cases.

Tutorial	Description
ntpl001_staff.C	Write and read tabular data with the RNTupleWriter and RNTupleReader
ntpl002_vector.C	Write and read vector-based data with the RNTupleWriter and RNTupleReader
ntpl004_dimuon.C	Analyze data stored in RNTuple with RDataFrame
ntpl005_introspection.C	Write and read data from a user-defined class with the RNTupleWriter and RNTupleReader, and collect runtime I/O information using RNTupleMetrics
ntpl007_mtFill.C	Fill multiple entries in parallel with the RNTupleWriter
ntpl008_import.C	Convert data stored in TTree to RNTuple with the RNTupleImporter
ntpl009_parallelWriter.C	Write multithreaded with the RNTupleParallelWriter
ntpl010_skim.C	Create a derived RNTuple (dropping, renaming and adding fields, applying cuts) with the RNTupleReader and RNTupleWriter
ntpl012_processor_chain.C	Read entries from a chain of RNTuples in a single event loop with the RNTupleProcessor
ntpl013_staged.C	Apply staged cluster committing to multithreaded writing with the RNTupleParallelWriter
ntpl014_framework.C	Use the various (more advanced) RNTuple interfaces to write data in the context of a framework
ntpl015_processor_join.C	Join the entries from two RNTuples on a common field value and read it using the RNTupleProcessor

Files
file	ntpl001_staff.C
	Write and read tabular data with RNTuple.
file	ntpl002_vector.C
	Write and read STL vectors with RNTuple.
file	ntpl004_dimuon.C
	Mini-Analysis on CMS OpenData with RDataFrame.
file	ntpl005_introspection.C
	Write and read an RNTuple from a user-defined class.
file	ntpl007_mtFill.C
	Example of multi-threaded writes using multiple REntry objects
file	ntpl008_import.C
	Example of converting data stored in a TTree into an RNTuple
file	ntpl009_parallelWriter.C
	Example of multi-threaded writes using RNTupleParallelWriter.
file	ntpl010_skim.C
	Example creating a derived RNTuple
file	ntpl011_global_temperatures.C
	This ROOT 7 example demonstrates how to use RNTuple in combination with ROOT 6 features like RDataframe and visualizations.
file	ntpl012_processor_chain.C
	Demonstrate the RNTupleProcessor for vertical compositions (chains) of RNTuples
file	ntpl013_staged.C
	Example of staged cluster committing in multi-threaded writing using RNTupleParallelWriter.
file	ntpl014_framework.C
file	ntpl015_processor_join.C
	Demonstrate the RNTupleProcessor for horizontal compositions (joins) of RNTuples