Search and select points form each quadrant

Hello

How to select two or any number of nearest points from each quadrant?

I have point T and I want to select only two nearest points from each quadrant.

Answer 1

[darova]

You can use pdist2 for this purpose

D = pdist2([xt yt],[x(:) y(:)]);
ix = D < 1;
plot(x(ix),y(ix),'or')
hold on
plot(x,y,'.b')
hold off