Clustering in Ruby using cluster

gistfile1.rb

require 'clusterer'
include Clusterer
@idf = InverseDocumentFrequency.new()
a = Document.new("a lion is a wild feline animal", :idf => @idf).normalize!(@idf)
b = Document.new("a dog is a friendly animal", :idf => @idf).normalize!(@idf)
c = Document.new("a cat is a feline animal", :idf => @idf).normalize!(@idf)
   
clus = Algorithms.bisecting_kmeans([a,b,c], 2, :maximum_iterations => 5)

# Results
# [#<Clusterer::Cluster:0x00000101200240 @documents=[{"lion"=>0.5, "wild"=>0.5, "felin"=>0.5, "anim"=>0.5}, {"cat"=>0.6134772025315336, "felin"=>0.5584110143854988, "anim"=>0.5584110143854988}]>, #<Clusterer::Cluster:0x00000101200218 @documents=[{"dog"=>0.4949907352038194, "friendli"=>0.4949907352038194, "anim"=>0.7141206789645324}]>]