Let's use this section to discuss topics related to data processing and intelligent systems. For several years, I have used various tools as an aid to handle research data. One beneficial tool I used is the WEKA Machine Learning Tool(http://www.cs.waikato.ac.nz/ml/weka/).
WEKA is an open source software package written in Java, which comprise of collections of tools for data pre-processing, classification, regression, association rules, prediction and visualization.
Experiences, comments, suggestions, problems, solutions, and etc. are welcome.