求大神用matlab surf绘制二元函数z=cos(x^2+y^2)在定义域内的空间曲面图x,y属于【0 pi】。并给出代码！

Question

求大神用matlab surf绘制二元函数z=cos(x^2+y^2)在定义域内的空间曲面图x,y属于【0 pi】。并给出代码！谢谢啊啊！急！

Answer 1

[x,y]=meshgrid(0:0.1:pi);
z=cos(x.^2+y.^2);

surf(x,y,z)

Answer 2

x=[0:pi];
y=[0:pi];
z=cos(x'*x+y'*y);
[x,y]=meshgrid(x,y);
surf(x,y,z)