It is Naive Bayes classifier, and the training data is kept always by Redis.

Add this line to your application's Gemfile:

gem 'inferx'

And then execute:

$ bundle

Or install it yourself as:

$ gem install inferx

require 'inferx'

inferx = Inferx.new
inferx.categories.add(:red, :green, :blue)

inferx.categories[:red].train(%w(
  he
  buy
  apple
  its
  apple
  fresh
))

inferx.categories[:green].train(%w(grasses ...))
inferx.categories[:blue].train(%w(sea ...))

puts inferx.classify(%w(apple ...)) # => red

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Added some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request