Charting Software for Performance Stats

Question

I'm looking for a charting library similar to amCharts that allows you to create graphs with a timeline, e.g:

http://www.amcharts.com/stock/

It should also allow to you to select a range within the chart and zoom in to see further specifics. The purpose of this is for visualizing performance related information such as i/o stats etc... Does anybody know of an open source library that will allow this? A Ruby (most preferable) or Python library would be ideal.

Answer 1

I don't know if that's going to be at all suitable for your needs, but recent "Communications of ACM" had an article about Protovis. The graphics is very impressive. Still on my todo list though.