(new features)

• format string for marker label
• add secondary y axis
• add property to specify space between data column (not bars)
• add composite chart of bar and line
• bar n line chart can use reference lines from line chart
• colored boxes for legends can be vary sized (through legend_box_sizes property)

(fixes)

• legend at bottom

v0.7.1b: fix pre normalize for secondary y axis

v0.7.2:

• add x_axis_on_top, if true, x axis markers will be drawn on top instead of bottom
• fix marker_format not working for side bar chart

A library for making beautiful graphs.

Add this line to your application's Gemfile:

gem 'gruff'

And then execute:

$ bundle

Or install it yourself as:

$ gem install gruff

require 'gruff'
g = Gruff::Line.new
g.title = 'Wow!  Look at this!'
g.labels = { 0 => '5/6', 1 => '5/15', 2 => '5/24', 3 => '5/30', 4 => '6/4',
             5 => '6/12', 6 => '6/21', 7 => '6/28' }
g.data :Jimmy, [25, 36, 86, 39, 25, 31, 79, 88]
g.data :Charles, [80, 54, 67, 54, 68, 70, 90, 95]
g.data :Julie, [22, 29, 35, 38, 36, 40, 46, 57]
g.data :Jane, [95, 95, 95, 90, 85, 80, 88, 100]
g.data :Philip, [90, 34, 23, 12, 78, 89, 98, 88]
g.data :Arthur, [5, 10, 13, 11, 6, 16, 22, 32]
g.write('exciting.png')

You can find many examples in the test directory along with their resulting charts in the output directory.

You can find older examples here: http://nubyonrails.com/pages/gruff

In progress!

In progress!

http://www.rubydoc.info/github/topfunky/gruff/frames

We aim to support all Ruby implementations supporting Ruby language level 1.9.3 or later. Currently we are running CI for MRI, JRuby, and Rubinius.

The source for this project is now kept at GitHub:

http://github.com/topfunky/gruff

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