can someone give me a simple example in how to use this code to plot a Lagrange polynomial? thank you!

function y=lagrange (x,point, pointy) LAGRANGE approx a point-defined function using the Lagrange polynomial interpolation LAGRANGE (X, POINTX, POINTY) approx the function definited by the pointa: Pl- (POINTX (1), POINTY (1)), P2- (POINTX (2), POINTY (2))PN (POINTX (N), POTNTY (N)) and calculate it in each elements of x 0nsize (pointx,2): T-ones tn,size (x, 2)) 14 for 1:n if (13) E- end 18- 9 end 20-O; 21-B for i=1:n end C4