Moneyball
Moneyball parses MLB Gameday's play-by-play information to pull useful quantitative and qualitative information out of the data feed. Moneyball can determine where a batted ball was hit, the general classification of the batted ball, and stat line information from the plate appearance.
Installation
Add this line to your application's Gemfile:
gem 'moneyball'
And then execute:
$ bundle
Or install it yourself as:
$ gem install moneyball
Usage
Moneyball::Parser
takes a Nokogiri XML node.
raw_xml = '<atbat event="Strikeout" des="Ty Cobb strikes out swinging."></atbat>'
nokogiri_node = Nokogiri::XML(raw_xml).search("atbat").first
stats = Moneyball::Parser.new(nokogiri_node).stats
stats.slice(:pa, :ab, :h, :k) # => { pa: 1, ab: 1, h: 0, k: 1 }
Moneyball::BattedBallLocationExtractor
and Moneyball::BattedBallTypeExtractor
take a string from the play-by-play summary.
summary = "Billy Hamilton hits a fly ball home run (22) to deep center field."
Moneyball::BattedBallTypeExtractor.new(summary).categorize # => "Line drive"
Moneyball::BattedBallLocationExtractor.new(summary).categorize # => "CF"
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
This is a work in progress! I have been using pieces of this code in private projects, but it's time for the saber community to get a crack at improving this code.
Any contributions should come with tests (we use RSpec) and a well documented PR. If you have a specific event from the Gameday feed that prompted your pull request, please reference it in your PR.
Here's how to contribute!
- Fork it ( https://github.com/[my-github-username]/moneyball/fork )
- Create your feature branch (
git checkout -b my-new-feature
) - Commit your changes (
git commit -am 'Add some feature'
) - Push to the branch (
git push origin my-new-feature
) - Create a new Pull Request
License
Moneyball is © 2015 Geoff Harcourt. It is free software, and may be redistributed under the terms specified in the LICENSE file.