GoogleVisualr::ImageSparkLine Creation Example

example_controller.rb

# http://code.google.com/apis/visualization/documentation/gallery/image_spark_line.html#Example
def image_spark_line

  @chart = GoogleVisualr::ImageSparkLine.new
  @chart.add_column("number", "Revenue" )
  @chart.add_column("number", "Licenses")

  @chart.add_rows(10)

  @chart.set_value(0,0,435)
  @chart.set_value(1,0,438)
  @chart.set_value(2,0,512)
  @chart.set_value(3,0,460)
  @chart.set_value(4,0,491)
  @chart.set_value(5,0,487)
  @chart.set_value(6,0,552)
  @chart.set_value(7,0,511)
  @chart.set_value(8,0,505)
  @chart.set_value(9,0,509)

  @chart.set_value(0,1,132)
  @chart.set_value(1,1,131)
  @chart.set_value(2,1,137)
  @chart.set_value(3,1,142)
  @chart.set_value(4,1,140)
  @chart.set_value(5,1,139)
  @chart.set_value(6,1,147)
  @chart.set_value(7,1,146)
  @chart.set_value(8,1,151)
  @chart.set_value(9,1,149)

  options = { :width => 120, :height => 40, :showAxisLines => false,  :showValueLabels => false, :labelPosition => 'left' }
  options.each_pair do | key, value |
    @chart.send "#{key}=", value
  end

end

image_spark_line.html.erb

<div id='chart'></div>
<%= @chart.render('chart') %>