Mathematica with ROOT

TL;DR

This paper introduces an open-source Mathematica importer for CERN ROOT files, enabling seamless data access and analysis within Mathematica, tested on large datasets from the ATLAS experiment.

Contribution

It provides a simple, unified interface for importing ROOT files into Mathematica, leveraging MathLink, and demonstrates its effectiveness on large-scale data.

Findings

Successfully imported large (~5 Gbyte) ROOT files

Achieved accurate and efficient data access

Facilitated offline analysis of ATLAS experiment data

Abstract

We present an open-source Mathematica importer for CERN ROOT files. Taking advantage of Mathematica's import/export plug-in mechanism, the importer offers a simple, unified interface that cleanly wraps around its MathLink-based core that links the ROOT libraries with Mathematica. Among other tests for accuracy and efficiency, the importer has also been tested on a large (~5 Gbyte) file structure, D3PD, used by the ATLAS experiment for offline analysis without problems. In addition to describing the installation and usage of the importer, we discuss how the importer may be further improved and customized. A link to the package can be found at: http://library.wolfram.com/infocenter/Articles/7793/ and a related presentation is at: http://cd-docdb.fnal.gov/cgi-bin/DisplayMeeting?conferenceid=522