Draw a function!

[Joe Horn]

(05-19-2015 11:00 PM)Alberto Candel Wrote:  Very impressive, thank you.

Here is, if I may, a suggestion for another graphing device for the future. Touching in \(n+1\) points on the screen, \((x_0,,y_0), \ldots, (x_n,y_n)\), the HP Prime displays the graph of the polynomial \(p\) of degree \(\le n\) such that \(p(x_k)=y_k\) for all \(0\le k\le n\). Can it be done?

That would nice, and easy to program, since this function is already built in:

simplify(lagrange([[x0,...,xn], [y0,...,yn]]) --> polynomial which passes through those points.