1. Sparklines

2. Galileo’s Sparklines

3. ET’s Sparklines

4. sudo gem install rmagick
sudo gem install sparklines
sudo gem install sparklines_generator
ruby script/generate sparklines
require 'sparklines'
class MyController < ApplicationController
helper :sparklines
end

5. Using the sparkline_tag Helper
<% sparkline_tag [array of ints 0-100],
:type => "type", options… %>
<%= sparkline_tag [49,23,89,10,86,37,32],
:type => 'smooth' %>
<%= sparkline_tag [49,23,89,10,86,37,32],
:type => 'discrete', :upper => 50,
:above_color => "red"%>

6. Creating Your Own Sparkline
def self.spark_name( array, options, max_value )
Must return a PNG image blob.