User's Guide
The ROOT User's Guide has been translated into DocBook (Xml). The corrections and updates are now made in this new format. The new version is still under development, therefore we will continue to provide, for a limited duration, the old version (see below on this page).
Latest User's Guide (A4 format) 
Latest User's Guide (HTML version)
Old version:
We will appreciate your comments on this edition. If you would like to contribute to a chapter, section, or even a paragraph, do not hesitate to contact us and send your comments to: rootdoc@root.cern.ch. You can also post your comments or questions in the section Documentation of the ROOT Forum.
| Files available for download: |
1 page per sheet ~11MB |
2 pages per sheet ~7MB |
MSWord Doc ~13MB |
User's Guide v5.26
User's Guide v5.26
Preface, Table of Contents and Table of Figures
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1 |
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283 |
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Contact information, used conventions, the ROOT framework |
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Collection types, general characteristics, iterators, memory management, hash tables |
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9 |
Physics Vectors |
291 |
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Two examples to start, coding conventions, global variables, ROOT environment, HBOOK/PAW Files |
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The TVector3 and TLorentzVector classes, rotation algorithms, transformations | |||
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23 |
299 |
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Creating and filling histograms, drawing options, histogram features |
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Geometrical modeler, shapes, available transformations, navigation, tracking, checking and visualization | |||
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51 |
Python and Ruby Interfaces |
351 |
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Creation of graphs, draw options, errors, graph filling, exclusion zone |
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PyROOT and RubyROOT are Python and Ruby extension modules allowing an interaction with ROOT/CINT | |||
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65 |
Tutorials and Tests |
365 |
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Fit panel, methods and functions, parameter setting, sub-ranges, the package Minuit |
ROOT examples in tutorials and test directories: Event application, benchmarks | |||||
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81 |
Example Analysis |
371 |
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Classes, methods and objects; inheritance and data encapsulation |
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An example of typical physics analysis of large data files chained together |
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| CINT the C++ Interpreter |
85 |
Networking |
377 |
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CINT command line interface, scripts, inspecting objects, ACLiC compiler |
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The use of ROOT socket classes for sending data over the network |
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101 |
Threads |
379 |
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The ownership by current directory, by master TROOT object, by user |
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Thread classes, threads and processes, known problems |
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105 |
PROOF: Parallel Processing |
387 |
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Graphical containers: canvas and pad, graphical objects, axis, legends, postscript interface, 3D viewers |
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The parallel ROOT facility |
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155 |
Writing a Graphical User Interface |
389 |
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How to create folder hierarchy, posting/reading data to/from a folder, execute and debug tasks |
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Widgets and frames, layout management, signals/slots event processing |
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159 |
ROOT / Qt Integration Interfaces |
423 |
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The ROOT files, streamers, pointers and references, schema evolution |
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Qt BNL and Qt GSI ways of access to the ROOT graphics |
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189 |
Automatic HTML Documentation |
433 |
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Using trees, branches, examples for writing and reading trees, trees in analysis |
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The automatic generation of ROOT reference guide |
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233 |
Install and Build ROOT |
437 |
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MathCore and MathMore libraries and their set of mathematical and statistical functions |
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Installing ROOT, copyright and licensing agreement; system.rootrc settings | |||
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257 |
Index |
447 |
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Overview of the matrix classes available in the linear algebra library |
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Detailed index, all ROOT classes and their methods used in this User's Guide |
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271 |
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TObject, the CINT dictionary generator, adding a class with a shared library, with ACLiC |
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| ROOT Packages Documented Elsewhere |
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Versions |
Revision History |
Date |
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| v5.26 Download |
Updates and fixes |
18-Feb-2011 |
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| v5.24 Download |
Updates and fixes |
30-Oct-2009 |
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| v5.21 Download |
Updates and fixes |
19-May-2009 |
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| v5.20 Download |
Updates and fixes |
30-Jul-2008 |
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| v5.16 Download |
New sub-chapters, updates and fixes |
16-Jul-2007 |
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| v5.14 Download |
New sub-chapters, updates and fixes |
20-Dec-2006 |
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| v5.12 Download |
New sub-chapters, updates and fixes |
11-Jul-2006 |
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Last update: 18-Feb-2011 |
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