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Currently, Gruff has much more documentation available online and is
more mature than Scruffy.
With Scruffy, you can mix graph types in the same graph, so you could, for example,
have a chart with both line and bar elements. Suppose you were charting the output of a
factory that builds widgets and sprockets. You could use the code in Listing 3-2 to create a
bar and line chart with the data.
nNote To run this example, you??™ll need to install Scruffy with the command gem install scruffy. You??™ll
also need RMagick installed, so install that with gem install rmagick, if you haven??™t already done so.
CHAPTER 3 n CREATING GRAPHS WITH RUBY 34
Figure 3-1. A chart of guitar values created using Gruff
Listing 3-2. Creating a Simple Chart with Scruffy (widget_chart_scruffy.rb)
require 'scruffy'
sprocket_output = [["Jan",500],
["Feb",750],
["Apr",380]]
widget_output = [["Jan",350],
["Feb",650],
["Apr",560]]
graph = Scruffy::Graph.new(
:title => "Widget and Sprocket Output",
:theme => Scruffy::Themes::Keynote.


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