introduction

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.

What is ROOT?

The ROOT system provides a set of OO frameworks with all the functionality needed to handle and analyze large amounts of data in a very efficient way. Having the data defined as a set of objects, specialized storage methods are used to get direct access to the separate attributes of the selected objects, without having to touch the bulk of the data.