# File lib/classifier/lsi.rb, line 155 def highest_relative_content( max_chunks=10 ) return [] if needs_rebuild? avg_density = Hash.new @items.each_key { |x| avg_density[x] = proximity_array_for_content(x).inject(0.0) { |x,y| x + y[1]} } avg_density.keys.sort_by { |x| avg_density[x] }.reverse[0..max_chunks-1].map end