iPhone, how do I draw a simple line graph from an array of prices and dates?

I'm looking for some very simple to develop line graph library. However, all the examples seem quite complicated. I have a database with two main fields, date and value.

Can anyone point me at or provide me with an开发者_如何学运维 example of code which will do just that ?

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I've used the CorePlot library with success. Here is a really good tutorial on how to use it.

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There's example code for line graphs in Apple's Accelerometer sample app.