GoogleVisualr Gem - Candlestick Chart Creation Example

controller.rb

# http://code.google.com/apis/chart/interactive/docs/gallery/candlestickchart.html
def candlestick_chart

  data_table = GoogleVisualr::DataTable.new
  data_table.new_column('string', 'day')
  data_table.new_column('number', 'min')
  data_table.new_column('number', 'opening')
  data_table.new_column('number', 'closing')
  data_table.new_column('number', 'max')
  data_table.add_rows( [
    ['Mon',20,28,38,45],
    ['Tue',31,38,55,66],
    ['Wed',50,55,77,80],
    ['Thu',50,77,66,77],
    ['Fri',15,66,22,68]
  ] )

  opts   = { :width => 400, :height => 240, :legend => 'none' }
  @chart = GoogleVisualr::Interactive::CandlestickChart.new(data_table, opts)

end

view.html.erb

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