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After making a quadratic equation solver for the iPhone I want to take it a step further by giving the user the ability to view the graph of the solved quadratic equation. I need some guidance on how to do so using the iPhone SDK and the available frameworks.
CorePlot is good for graphing, yes, but it doesn’t actually graph equations (unless you already have a list of all the x-y points for the equation). For that I recommend Graham Cox’s excellent GCMathParser: http://www.apptree.net/parser.htm
It’s pretty easy to use and has support for variables and whatnot. I built a rudimentary graphing calculator in under a day with it.