Bumpspark

Generate "bumpspark"-style sparklines from Ruby & Rails. Bumpsparks are sparklines which show discrete data points and highlight extremes.

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).

Credits

Thanks to the original collaborators:

gem install bumpspark

Add bumpspark as a dependency:

gem 'bumpspark'

Use bumpspark_tag from 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

Generate a bumpspark directly from the commandline.

% cat temperature.txt
23 25 33 22 25 33 22

% cat temperature.txt | bumpspark > temperature.png

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.