Identification of overlapping points

Hi all,

I have the following code.

hold on
for r=10:5:24 % r is radius
circles(r,17,12); % using circles function
   
   for i=1:1:20;
   for j=1:1:20;
       
       if mod(i,2)==1; % even case
       if mod(j,2)==1; % odd case
            plot(i,j, 'bo');
           
       elseif mod(i,2)==0; 
       elseif mod(j,2)==0;
            plot(i,j,"ro");

       else
           
           end
           end
             

        
       end


    end
    end

   
hold off

I have attached an image of the plot.

I want only the small circles (red and blue points) overlapping with the larger circles to appear. Any advice on how this can be achived. Many thanks.

Below is the circles function code.

function [x, y] = circles(r,Cx,Cy)

theta=linspace(0,2*pi,200);

x=r*cos(theta)+Cx;
y=r*sin(theta)+Cy;
plot(x,y)
end

Answer 1

[Image Analyst]

I'd try pdist2 to see when the centers of the small circles are within their radius of any of the points on the larger circles.