Team AxIS

Overall Objectives
Scientific Foundations
Application Domains
New Results
Contracts and Grants with Industry
Other Grants and Activities

Section: Software

SODAS 2 Software

Participants : Yves Lechevallier [ correspondant ] , Marc Csernel.

The SODAS 2 Software  [116] is the result of the European project “ASSO” (Analysis System of Symbolic Official data), that started in January 2001 for 36 months. It supports the analysis of multidimensional complex data (numerical and non numerical) coming from databases mainly in satistical offices and administration using Symbolic Data Analysis [90] .

SODAS 2 is an improved version of the SODAS software developed in the previous SODAS project, following users' requests. This new software is more operational and attractive. It proposes innovative methods and demonstrates that the underlying techniques meet the needs of statistical offices.

SODAS allows for the analysis of summarised data, called Symbolic Data. This software is now in the registration process at APP. The latest executive version (version 2.50) of the SODAS 2 software, with its user manual can be downloaded at

The main contributions of AxIS to SODAS are:

  1. a Symbolic Object Library (SOL [94] ) that provides foundation tools, such as data loading and saving, selection, etc .

  2. a divisive hierarchical clustering method on complex data tables called DIV [110]

  3. a partitionning clustering method on complex data tables called SCLUST [110]

  4. a supervised classification tree for symbolic data, called TREE [110]

  5. a tool for extracting symbolic objects from databases [111] , called DB2SO, jointly developed with EDF

Those contributions have been registered at APP.


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