function ShowVector2Norm()
% Displays lots of vectors that have unit 2-norm
close all
plot([-2 2],[0 0],'k',[0 0],[-2 2],'k')
axis equal
grid on
shg
hold on
for k=1:200
x = randn(2,1);
x = x/norm(x);
plot(x(1),x(2),'.r')
shg
end
hold off