FrIDA -A Free Intelligent Data Analysis Toolbox

This paper describes a Java-based graphical user interface to a large number of data analysis programs the first author has written in C over the years. In addition, this toolbox is equipped with basic visualization capabilities, like scatter plots and bar charts, but also with specialized visualization modules for decision and regression trees as well as prototype-based classifiers. The architecture is like a toolbox: individual tools refer to the different data analysis methods. All parts of this toolbox (Java as well as C based) are free and open software under the Gnu Lesser (Library) Public License.