How to cluster the users based on the minimum distance with respect to the base station.

I have generated the code with respect to three users and computed the distance of three users with respect to the base station.

N_UE=3

Xmax=1; % x-coordinate for base station

Ymax=1; % y-coordinate for base station

radius=2; %coverage radius

xsd=ones(1,N_UE)*Xmax;

ysd=ones(1,N_UE)*Ymax;

rrx=radius*sqrt(rand(1,N_UE));

thetarx=2*pi*rand(1,N_UE);

ang=0:0.01:2*pi;

xrx=xsd+rrx.*cos(thetarx); %random position of receivers-->x-coordinate

yrx=ysd+rrx.*sin(thetarx); %random position of receivers-->x-coordinate

th = 0:pi/100:2*pi;

xunit = radius * cos(th) + Xmax;

yunit = radius * sin(th) + Ymax;

figure

plot(xunit, yunit);

hold on

plot(ysd,xsd,'r^')

hold on

PPP=[xrx.', yrx.'];

plot(PPP(:,1),PPP(:,2),'k*')

dist2=sqrt((xrx-xsd).^ 2+(yrx-ysd).^2)

The code executes and gives me the result.

As i am having three users the users can be clustered in 5 possible ways

{a},{b},{c}

{ab},{c}

{bc},{a}

{ac},{b}

{abc}.

the clustering needs to be done by computing the minimum difference in distance with respect to the base station.

Could anyone please help me on this.