matlab（用matlab画图）

Question

用surf和mesh画出z=x^2+2y^2

Answer 1

假设题主的画图范围是-1到1

[x,y]=meshgrid(-1:0.1:1);
z = x.^2+y.^2;
figure(1)
surf(x,y,z);
title('surf')
figure(2)
mesh(x,y,z);
title('mesh')