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Root: An OO Framework for Large Scale Data Analysis

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• Apr 20, 1998: Version 2.00/05 for MkLinux became available. I started using it and found it great. If you know PAW in CERNLIB, it's just like PAW but the command line language is C++! It has a built-in C++ interpreter and executes the standard input, line by line, as a C++ program. You can thus interactively build your analysis program in C++ and later submit it as a batch job.

  You can edit resultant plots by your mouse: you can change line-, fill-, and text-attributes at will, and create colorful nice figures quite easily in encapsulated postscript format.

  The ROOT is, however, more than a plotting application. You can build various data handling applications based on the ROOT libraries. Why don't you visit the ROOT home page.

  The ROOT Home Page is located at

  http://root.cern.ch/

  from where you can get an MkLinux binary package. The ROOT system is free for noncommercial use unlike CERNLIB.

[1] Origin

ftp://root.cern.ch/root/root_v2.00.MkLinux.2.1.24.tar.gz

[2] How to Install ROOT

# tar -zxvf root_v2.00.MkLinux.2.1.24.tar.gz -C /usr/local

[3] Getting Started with ROOT

$ less /usr/local/root/AA_README

$ export ROOTSYS=/usr/local/root

$ export PATH=$PATH:$ROOTSYS/bin

$ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ROOTSYS/lib

Then you can try out a ROOT interactive session:

$ cd <somewhere>/

$ cp -R $ROOTSYS/tutorials .

$ cd tutorials

$ ./root

  *******************************************
  *                                         *
  *        W E L C O M E  to  R O O T       *
  *                                         *
  *   Version   2.00/05     21 April 1998   *
  *                                         *
  *  You are welcome to visit our Web site  *
  *          http://root.cern.ch            *
  *                                         *
  *******************************************

CINT/ROOT C/C++ Interpreter version 5.13.46, Mar 22 1998
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.

root [1] .x demos.C

-- Click on Help on Demos.

-- Click on Hsimple first. Then in any order.

-- Move the objects on the canvas around using the mouse.

-- You want also try "first" to see how the C++ interpreter

-- works interactively.

root [2] .q

$

Enjoy!

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