NCD

Ruby gem for calculating Normalized Compression Distance (NCD).

It's inspired by RubyForge code snippet.

Installation

Add this line to your application's Gemfile:

gem 'ncd'

And then execute:

$ bundle

Or install it yourself as:

$ gem install ncd

Usage

require 'ncd'

a = File.read('somefile.a')
b = File.read('somefile.b')
distance = NCD.distance(a, b)
# or 
distance = a.ncd(b)

Setting compression level

NCD.level = Zlib::Defalate::DEAULT_COMPRESSION

Valid values of level are Zlib::Deflate::NO_COMPRESSION, BEST_SPEED, BEST_COMPRESSION, DEFAULT_COMPRESSION, and an integer from 0 to 9.

default compression level is Zlib::Defaulte::BEST_COMPRESSION.

Contributing

1. Fork it
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 new Pull Request