A little Gem to calculate Shannon entropy (base 2).
Add this line to your application's Gemfile:
gem 'shannon'And then execute:
$ bundle
Or install it yourself as:
$ gem install shannon
require "shannon"
Shannon::entropy "" #=> 0
Shannon::entropy "aaaa" #=> 0
Shannon::entropy("abcde").round 4 #=> 2.3219It uses base 2 for the log by default, so Shannon::entropy "abcde" and Shannon::entropy "abcde", 2 will give the same answer.
After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also 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, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/shannon. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.