Neural Network to approximate function

Hello

I am trying to create a Neural Network to predict af function (Rosenbrock function). I desire to use the toolbox provided by MATLAB but i don't know which function to use. Can someone help me?

The Rosenbrock function looks like this: f(x,y) = (1 - x)2 + 100 (y - x2)2

Hope someone is willing to help me.

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