What is your preferred way to produce charts in a Ruby on Rails web application?

Question

I\'d like to add some pie, bar and scatter charts to my Ruby on Rails web application. I want want them to be atractive, easy to add and not introduce much overhead.

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Answer 1

This isn't specifically RoR however, it is pretty slick port of Gruff to javascript: http://bluff.jcoglan.com/