GoogleVisualr::LineChart Creation Example

example_controller.rb

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

  @chart = GoogleVisualr::LineChart.new
  @chart.add_column('string', 'Year')
  @chart.add_column('number', 'Sales')
  @chart.add_column('number', 'Expenses')
  @chart.add_rows(4)
  @chart.set_value(0, 0, '2004')
  @chart.set_value(0, 1, 1000)
  @chart.set_value(0, 2, 400)
  @chart.set_value(1, 0, '2005')
  @chart.set_value(1, 1, 1170)
  @chart.set_value(1, 2, 460)
  @chart.set_value(2, 0, '2006')
  @chart.set_value(2, 1, 1500)
  @chart.set_value(2, 2, 660)
  @chart.set_value(3, 0, '2007')
  @chart.set_value(3, 1, 1030)
  @chart.set_value(3, 2, 540)

  options = { :width => 400, :height => 240, :title => 'Company Performance', :legend => 'bottom' }
  options.each_pair do | key, value |
    @chart.send "#{key}=", value
  end

end

line_chart.html.erb

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