Using ‘surf’ plot the surface f (x, y) =x(x^2+y^2).

clear
clc
x=-1:.05:1;
y=-1:.05:1;
[x,y]=meshgrid(x,y);
z=x.*(x^2+y^2)
surf(x,y,z);
colormap spring
shading interp

Answer 1

[Sam Chak]

I guess it's here:

z=x.*(x.^2 + y.^2);