Is there a way to assign the RED points which are located within the Red STARS range (assume STARS have range (as circle) is 100m raduis), while the other RED points that are located out of the STAR range let them associated to the 'DOT BLACK' which is located in the center and this black dot has raduis 1000m which is ro as mentioned in the code below'' ?

dipict what we have mentioned in the description

ro=1000; %  radius of the layout circle 
NumDrones=2;  %  Number of Drones
NumUEs=20;   %Number of users
center=[0 0]; % center of the circle
theta_Drones=2*pi*(rand(NumDrones,1)); % distributed random number of Drones
g = 0.5 * ro + 0.5 * ro * rand(NumDrones,1); % to make them away from the center of circle 
PosDrones_x=center(1)+g.*cos(theta_Drones);
PosDrones_y=center(2)+g.*sin(theta_Drones); 
PosBSs=[PosDrones_x PosDrones_y];
theta1 = rand(NumUEs, 1) * 2*pi; % distributed random number of Users
r1 = ro * sqrt(rand(NumUEs, 1));
PosUE_x = [r1 .* cos(theta1(:)) + center(:,1)]; 
PosUE_y = [r1 .* sin(theta1(:)) + center(:,2)]; 
PosUE = [r1 .* cos(theta1) + center(1),r1 .* sin(theta1(:)) + center(2)]; 
plot(PosBSs(:,1),PosBSs(:,2),'rp','MarkerSize', 30);
hold on
plot(PosUE(:,1),PosUE(:,2),'r.','MarkerSize', 12);       
hold on
PosgNB_x = [0 0, 0 0].'; 
PosgNB_y = [0 0, 0 0].';
PosgNB = [PosgNB_x,PosgNB_y]; 
plot(PosgNB_x.',PosgNB_y.','k.','MarkerSize', 40);       
hold on
distances = hypot(PosDrones_x-PosUE(:,1).', PosDrones_y-PosUE(:,2).');
distances1 = hypot(PosgNB_x-PosUE(:,1).', PosgNB_y-PosUE(:,2).');
[~, assigned_BS] = min(distances, [],1);
[~, assigned_BS1] = min(distances1, [],1);
plot([PosUE(:,1) PosDrones_x(assigned_BS)].', [PosUE(:,2) PosDrones_y(assigned_BS)].', ...
      'color',  [0 0 1]);
plot([PosUE(:,1) PosgNB_x(assigned_BS1)].', [PosUE(:,2) PosgNB_y(assigned_BS1)].', ...
      'color',  [.5 .5 .5])
grid on
hold on    
axis equal
t = linspace(0, 2*pi);% Plot the layout of network as circle
plot(ro * cos(t) + center(1),ro * sin(t) + center(2))