Core Plot
When you cope with data is better to visualize it. A nice framework for iPhone is Core Plot, has many capabilities and is bast at the moment. The last version is 0.9 The only serious problem I faced, is the lack of documentation for the first steps. ??Specifically if you are using Xcode 4.2… the situation is getting harder. I found only one tutorial that uses the last Xcode. You can find it in??Dr John Wordsworth??site and specifically here. Enjoy!