Using x as your list of x coordinates and y as your list of y coordinates of the circle centers:
R = 1; % or whatever you like...
t = linspace(0,2*pi,100);
cx = R*cos(t);
cy = R*sin(t);
figure
hold all
for ii = 1:length(x)
plot(cx+x(ii),cy+y(ii))
end
hold off
axis equal
