tutorials

TTree

A TTree is a large, structured chunk of data on disk. The trick is that only selected parts of it are in memory at any given time. Here, with the help of some illustrations by our colleague Ioannis, we see how to extract these parts. Sit back and enjoy - in this step there is nothing for you to run.

Overview

The goal of this tutorial session is to learn how to read a tree from a ROOT file, extract some data from it, display a histogram and then fit it.

Information about the ROOT classes can be found on the ROOT reference guide, and there is also a web based documentation and a User's Guide available to download.

This page lists a number of ROOT tutorials and courses. Some are made by third parties others by the ROOT team.

In this pages we will dissect the PROOF tutorials and steering macros available under tutorials/proof.