Tutorials

A collection of C++ macros, Python scripts and notebooks helping to learn ROOT by example.

You can execute the scripts in $ROOTSYS/tutorials (or sub-directories) by setting your current directory in the script directory or from any user directory with write access.

Several tutorials create new files. If you have write access to the tutorials directory, the new files will be created in the tutorials directory, otherwise they will be created in the user directory.

You can start by executing the standard ROOT demos with a session like:

root > .x demos.C

or

root > .x $ROOTSYS/tutorials/demos.C

You can execute the standard ROOT graphics benchmark with

root > .x benchmarks.C

or

root > .x $ROOTSYS/tutorials/benchmarks.C

The $ROOTSYS/tutorials directory includes several sub-directories:

Modules
	Histograms tutorials
	Examples showing the "histograms' classes" usage.
	Tree tutorials
	Example code which illustrates how to use ROOT trees and ntuples.
	Dataframe tutorials
	These examples show various features of RDataFrame: ROOT's declarative analysis interface.
	ROOT 7 tutorials
	Various examples showing the ROOT 7 interface.
	FOAM tutorials
	Examples showing how to use FOAM.
	Containers tutorials
	Examples showing the "containers' classes" usage.
	Event display tutorials
	Examples showing the "Event display classes" usage.
	Event display ROOT7 tutorials
	Examples showing the "Event display classes" usage with ROOT7.
	Geometry tutorials
	Various ROOT geometry package examples.
	Fast Fourier Transforms tutorials
	Example showing the Fast Fourier Transforms interface in ROOT.
	Fit Tutorials
	These tutorials illustrate the main fitting features. Their names are related to the aspect which is treated in the code.
	RooFit Tutorials
	These tutorials illustrate the main features of RooFit: the name of the examples and their short description help in figuring out their objective.
	Graphs tutorials
	Examples showing the "graphs classes" usage.
	Graphics tutorials
	Various examples showing the basic ROOT graphics.
	OpenGL tutorials
	Various examples showing the OpenGL graphics in ROOT.
	Tutorials specific to Mac/Cocoa
	Various examples showing graphics done with the Mac graphics system Cocoa.
	GUI tutorials
	Example code which illustrates how to use the ROOT GUI.
	HistFactory Tutorials
	These tutorials illustrate the usage of the histfactory.
	HTTP tutorials
	Examples showing the HTTP interface.
	Image tutorials
	Examples showing the TImage class usage.
	IO tutorials
	These tutorials illustrate some of the capabilities of the ROOT IO subsystem.
	Math tutorials
	Examples showing the Math classes.
	Matrix tutorials
	Examples showing how to use TMatrix.
	Monte Carlo tutorials
	Monte Carlo examples.
	Multicore tutorials
	These examples aim to illustrate the multicore features of ROOT, such as thread awareness and safety, multithreading and multiprocessing.
	Net tutorials
	Examples showing the net classes.
	Physics tutorials
	Physics examples.
	PyRoot tutorials
	Selected examples illustrating how to use ROOT's Python interface: PyROOT.
	Pythia tutorials
	Examples showing the pythia usage.
	Quadratic programming package.
	Example showing the usage of the quadratic programming package quadp.
	R tutorials
	Examples showing the R interface.
	RooStats Tutorials
	These tutorials illustrate the main features of RooStats.
	Spectrum tutorials
	Examples showing the TSpectrum and TSpectrumPainter usage.
	TSPlot tutorials
	This tutorial illustrates the use of class TSPlot.
	SQL tutorials
	Examples showing the SQL classes.
	TMVA tutorials
	Example code which illustrates how to use the TMVA toolkit.
	TUnfold tutorials
	Test programs for the classes TUnfold and related.
	Unuran tutorials
	Examples showing unuran capabilities.
	VecOps tutorials
	These examples show the functionalities of the VecOps utilities.
	FITS files interface tutorials
	Examples showing the FITS file interface.
	XML tutorials
	XML examples.
	Proof tutorials
	These examples aim to illustrate the usage of PROOF.
	TWebCanvas tutorials
	Examples showing the special features of web-based canvas.
	Webgui tutorials
	Webgui examples.
	Legacy tutorials
	Legacy Tutorials.

Files
file	demos.C
	This macro shows a control bar to run some of the ROOT tutorials.
file	demoshelp.C
	This macro shows help on running the Demos.
file	hsimple.C
	This program creates :
file	rootlogoff.C
	Example of rootlogoff.C.
file	rootlogon.C
	Example of rootlogon.C.