function spherical(x,y)
%UNTITLED1 Summary of this function goes here
%  Detailed explanation goes here

x=-3:0.1:3; y=-3:0.1:3;
[X,Y]=meshgrid(x,y);
Z=(4-X.^2-Y.^2).^0.5;

img = surf(X,Y,Z,'EdgeColor','none')
%colormap(gray);
%view(0,-90)
view(0,30)
%rotate(img,[0,90],90)
%viewmtx(0,90,60)
axis off
%axis equal
axis square
axis equal
axis vis3d
%axis image
axis fill