x=pi/pi;[x，y]=meshgrid(x);z=sin(y).cos(x);surf(x，y，z);;x=pi/pi;[x，y]=meshgrid(x);z=sin(y).cos(x);surface(x，y，z);gridon;view(，.);fx=@(x，y)x;fy=@(x，y)y;fz=@(x，y)sin(y).cos(x);fsurf(fx，fy，fz，[，pi])