Squid · A Ruby library to plot charts in PDF filesEither type gem install squid or add gem 'squid', '~> 1.2' to your Gemfile. Note that Ruby >= 2.1 is required. And Rails >= 4.0, if used with Rails. The project is open source (MIT license) and the code available on GitHub. Squid adds a single method chart(data = {}, settings = {}) to the Prawn::Document class. If you have never used Prawn to generate PDF files, you should first read its manual. G
