create Graphical charts using rails

Hi
     Could anybody please point me to some good links to draw Graphical
charts using RubyOnRails and also suggest which is the best one?

Thanks in advance
Sijo

This has not so much to do with Rails, but at least I think you can
use them for free.

http://www.fusioncharts.com/free/LiveDemos.asp?gMenuItemId=4

Sijo Kg wrote:

Hi
     Could anybody please point me to some good links to draw Graphical
charts using RubyOnRails and also suggest which is the best one?

Thanks in advance
Sijo

You could use Google charts (http://code.google.com/apis/chart/)

Use the gchartrb gem, then you can write helpers like this:

      GoogleChart::BarChart.new('600x200', nil, :vertical, false) do

bc>

        bc.data nil, result, '623d2a'
        bc.axis :x, :labels => labels, :color => '000000'
        bc.axis :y, :labels => [0,(result.max/2).to_i,result.max],
:color => '000000'
        bc.width_spacing_options :bar_width => 25, :bar_spacing => 30,
:group_spacing => 40

        @result = image_tag(bc.to_url)
      end