GoogleVisualr::PieChart Creation Example

example_controller.rb

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

  @chart = GoogleVisualr::PieChart.new
  @chart.add_column('string', 'Task')
  @chart.add_column('number', 'Hours per Day')
  @chart.add_rows(5)
  @chart.set_value(0, 0, 'Work'     )
  @chart.set_value(0, 1, 11 )
  @chart.set_value(1, 0, 'Eat'      )
  @chart.set_value(1, 1, 2  )
  @chart.set_value(2, 0, 'Commute'  )
  @chart.set_value(2, 1, 2  )
  @chart.set_value(3, 0, 'Watch TV' )
  @chart.set_value(3, 1, 2  )
  @chart.set_value(4, 0, 'Sleep'    )
  @chart.set_value(4, 1, 7  )

  options = { :width => 400, :height => 240, :title => 'My Daily Activities', :is3D => true }
  options.each_pair do | key, value |
    @chart.send "#{key}=", value
  end

end

pie_chart.html.erb

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