Notes & code from RailsConf 2009 presentation: en.oreilly.com/rails2009/public/schedule/detail/7966
Slides: bit.ly/railsconf-pagerank
# page 1 -> page 2 (0.33) # page 2 -> page 3 (0.33) # page 3 -> page 1 (0.33) puts "Circular: ", pagerank(Matrix[[0,0,1], [0,0,1], [1,0,0]]) # page 1 -> page 3 (0.05) # page 1 & page 2 have minimal postrank values # page 2 -> page 3 (0.05) # min value = min(t * Teleport Vector) # page 3 -> page 3 (0.09) # for uniform teleport vector, min = t * (1/N) puts "Star: ", pagerank(Matrix[[0,0,0], [0,0,0], [1,1,1]]) # page 1 -> page 2, page 3 (0.05) # page 2 -> page 3 (0.07) # page 3 -> page 3, page 3 (0.87) puts "Converge: ", pagerank(Matrix[[0,0,0], [0.5,0,0], [0.5,1,1]]) # page 1 -> page 1, page 2 (0.18) # page 2 -> page 1, page 3 (0.13) # page 3 -> page 3 (0.69) puts "Linked:", pagerank(Matrix[[0.5,0.5,0], [0.5,0,0], [0,0.5,1.0]])