Adding mathematical function plotting

[laurentmorvillier]

It would be great to be able to draw a mathematical function, like y = x^2.
We could provide a function of the like:

func value(for x: Double) -> Double

I'm currently looking to remove another chart library from my project and this is the only missing piece!

[jjatie]

This is an interesting feature. At first glance it seems like it could be a relatively simple addition. You can have a custom DataSet type that you provide a function to, to generate entries. Only generate the ones that you need to display (plus a little overshoot).

[liuxuan30]

or you have to stroke bezier curve, that will be tricky to draw something like y=x^2..