GoogleVisualr Gem - Pie Chart Creation Example

controller.rb

# http://code.google.com/apis/chart/interactive/docs/gallery/piechart.html#Example
def pie_chart

  data_table = GoogleVisualr::DataTable.new
  data_table.new_column('string', 'Task')
  data_table.new_column('number', 'Hours per Day')
  data_table.add_rows(5)
  data_table.set_cell(0, 0, 'Work'     )
  data_table.set_cell(0, 1, 11 )
  data_table.set_cell(1, 0, 'Eat'      )
  data_table.set_cell(1, 1, 2  )
  data_table.set_cell(2, 0, 'Commute'  )
  data_table.set_cell(2, 1, 2  )
  data_table.set_cell(3, 0, 'Watch TV' )
  data_table.set_cell(3, 1, 2  )
  data_table.set_cell(4, 0, 'Sleep'    )
  data_table.set_cell(4, 1, 7  )

  opts   = { :width => 400, :height => 240, :title => 'My Daily Activities', :is3D => true }
  @chart = GoogleVisualr::Interactive::PieChart.new(data_table, opts)

end

view.html.erb

<div id='chart'></div>
<%= render_chart @chart, 'chart' %>