Generate "bumpspark"-style sparklines from Ruby & Rails.
Note: This library is based on _why's `bumpspark' code, originally discussed and collaborated on at RedHanded. It has been refactored and built out as a gem suitable for inclusion in Rails projects (and standalone Ruby code).
Bumpsparks are sparklines which show discrete data points and highlight extremes. If you like Tufte and _why, you'll probably like these.
Thanks to the various collaborators on _why's original post:
- _why (concept, BMP implementation)
- jzp (png)
- MenTaLguY (transparency)
Since 1.1.0, bumpspark is only released on gemcutter. To install, you can setup gemcutter as your default gem source.
$ gem install gemcutter $ gem tumble
Then you can install it:
$ gem install bumpspark
You can also just get it in one line:
$ gem install bumpspark -s http://gemcutter.org
- Include the gem as a gem dependency in
bumpspark_tagfrom your views or helpers, passing it the data points you'd like graphed.
<%= bumpspark_tag [12, 34, 12, 42, 12, 23] %>
Simply create a
Bumpspark::Graph instance and call
to_png on it.
require 'bumpspark' graph = Bumpspark::Graph.new [12, 34, 12, 42, 12, 23] File.open('bumpspark.png', 'wb') do |file| file.write graph.to_png end
Note on Patches/Pull Requests
Please check the TODO file for information on things that need doing.
- Fork the project.
- Make your feature addition or bug fix.
- Add tests for it. This is important so I don't break it in a future version unintentionally.
- Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but bump version in a commit by itself I can ignore when I pull)
- Send me a pull request. Bonus points for topic branches.
Copyright (c) 2009 Bruce Williams, et al. See LICENSE for details.