Graph visualization libraries on iphone

Are there are any libraries that are available for visualizing graphs for iphone sdk? Something like thi开发者_StackOverflows. There is no need for any animation. Simple laying out of graph is fine. Any pointers are appreciated!

Core Plot is a plotting framework for Mac OS X and iPhone OS. It provides 2D visualization of data, and is tightly integrated with Apple technologies like Core Animation, Core Data, and Cocoa Bindings.

I have created a simple but very effective implementation for graphs. Check it out:

https://github.com/freshking/DynamicGraphView