Show the example of how to using fusioncharts-free in rails 3.2 
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1. In app/assets (add jquery and rails.js)
      |
      |_ javascripts
            |
            |_ jquery.js // version need to be > 1.6
            |
            |_ rails.js
            |
            |_ FusionCharts.js (load from http://www.fusioncharts.com/goodies/fusioncharts-free/)

2. In Public (add FusionCharts folder)
        |
        |_ FusionCharts (load from http://www.fusioncharts.com/goodies/fusioncharts-free/)
              |
              |_ Charts
                    |
                    |_ FCF_Area2D.swf
                    |
                    |_ FCF_Bar2D.swf
                    |       .
                    |       .
                    |       .
                    |_ FCF_StackedColumn3D.swf

Thank you fusioncharts for beautiful and attractive graph, 
which allow developer like us be able to generate the garph easier.