Objective-C Charting Framework

Question

I\'m in urgent need of an Objective-C/Cocoa/Cocoa Touch framework to handle simple charting; pie chards, histograms etc.

The only thing that comes close is:

Answer 1

I'll echo the suggestion of core-plot, and add some additional plotting references that may be of interest:

http://cocoaheads.byu.edu/resources/plot