I am creating a Rails application that needs some data visualization. What is a good library for learning? (If that matters, I have little Internet / javascript experience, but I'm starting to learn.)
I chatted with Protovis ... But, well, I don’t understand what the hype is. It seems quite long and painful even to create just a simple histogram with axes and badly in need of defaults! [But the only other real graphics library I used is ggplot2 in R, so maybe this is standard on the web?]
I saw what gRaphael suggested, and the one-piece example code I saw on the website [for piechart] makes it a lot easier to use than Protovis. But there is no documentation, so I do not know how to learn how to use it.
In the past, I played a little with the Google Charts API and it is pretty easy to use and well-documented, so maybe I should just stick with it if I don’t need anything heavy duty and tuned?
So I think: what are the advantages / disadvantages of Protovis / gRaphael / Google Charts? Are there any other data visualization libraries that I should consider?
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