CollaborativeFiltering

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Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file lib/collaborative_filtering. To experiment with that code, run bin/console for an interactive prompt.

Installation

Add this line to your application's Gemfile:

gem 'collaborative_filtering'

And then execute:

$ bundle

Or install it yourself as:

$ gem install collaborative_filtering

Requirements

collaborative_filtering supports the following Ruby versions:

  • 2.0.0
  • 2.1.0

Usage

require 'collaborative_filtering'

CollaborativeFiltering::Sample.all_sample

        //////////////////////////////////////////////////////////////
        // this source exists lib/collaborative_filtering/sample.rb //
        //////////////////////////////////////////////////////////////

SAMPLE = {
    "Yamada"=>{"Curry"=>2.5, "Ramen"=>3.5, "Fried rice"=>3.0, "Sushi"=>3.5, "Beef bowl"=>2.5, "Wheat noodle"=>3.0},        
    "Tanaka"=>{"Curry"=>3.0, "Ramen"=>3.5, "Fried rice"=>1.5, "Sushi"=>5.0, "Wheat noodle"=>3.0, "Beef bowl"=>3.5}, 
    "Sato"=>{"Curry"=>2.5, "Ramen"=>3.0, "Sushi"=>3.5, "Wheat noodle"=>4.0},
    "Nakamura"=>{"Ramen"=>3.5, "Fried rice"=>3.0, "Wheat noodle"=>4.5, "Sushi"=>4.0, "Beef bowl"=>2.5}, 
    "Kawamura"=>{"Curry"=>3.0, "Ramen"=>4.0, "Fried rice"=>2.0, "Sushi"=>3.0, "Wheat noodle"=>3.0, "Beef bowl"=>2.0}, 
    "Suzuki"=>{"Curry"=>3.0, "Ramen"=>4.0, "Wheat noodle"=>3.0, "Sushi"=>5.0, "Beef bowl"=>3.5}, 
    "Shimobayashi"=>{"Ramen"=>4.5, "Beef bowl"=>1.0, "Sushi"=>4.0}
}

write like this -> CollaborativeFiltering.sim_distance(SAMPLE, 'Yamada', 'Tanaka')
0.14814814814814814

write like this -> CollaborativeFiltering.sim_pearson(SAMPLE, 'Yamada', 'Tanaka')
0.39605901719066977

write like this -> CollaborativeFiltering.top_matches(SAMPLE, 'Shimobayashi')
[[0.9912407071619299, "Yamada"], [0.9244734516419049, "Kawamura"], [0.8934051474415647, "Nakamura"], [0.66284898035987, "Suzuki"], [0.38124642583151164, "Tanaka"]]

write like this -> CollaborativeFiltering.get_recommendations(SAMPLE, 'Shimobayashi')
[[3.3477895267131017, "Wheat noodle"], [2.8325499182641614, "Curry"], [2.530980703765565, "Fried rice"]]

write like this -> menu = CollaborativeFiltering.transform_prefs(SAMPLE)
write like this -> CollaborativeFiltering.top_matches(menu, 'Sushi')
[[0.6579516949597695, "Beef bowl"], [0.4879500364742689, "Curry"], [0.11180339887498941, "Ramen"], [-0.1798471947990544, "Wheat noodle"], [-0.42289003161103106, "Fried rice"]]

Development

After checking out the repo, run bin/setup to install dependencies. Then, run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release to create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

  1. Fork it ( https://github.com/8398a7/collaborative_filtering/fork )
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create a new Pull Request