AI4R is a collection of ruby algorithms implementations,
covering several Artificial intelligence fields.  It implements:

 * Genetic algorithms
 * Self-organized maps (SOM)
 * Neural Networks
    - Multilayer perceptron with Backpropagation learning
    - Hopfield net
 * Automatic classifiers (Machine Learning)
    - ID3 (Decision Trees)
    - PRISM (J. Cendrowska, 1987)
    - Multilayer Perceptron
    - OneR (AKA One Attribute Rule, 1R)
    - ZeroR
    - Hyperpipes
    - Naive Bayes
    - IB1 (D. Aha, D. Kibler - 1991)
 * Data clustering
    - K-means
    - Bisecting k-means
    - Single linkage
    - Complete linkage
    - Average linkage
    - Weighted Average linkage
    - Centroid linkage
    - Median linkage
    - Ward's method linkage
    - Diana (Divisive Analysis)

WWW: http://ai4r.rubyforge.org