function plot_mst_2d(rr,E, h)



if (nargin < 3)

    h = figure();

end

figure(h);

hold on

line(rr(E(1,:),1),rr(E(1,:),2))

for i=1:size(E,1)

    line(rr(E(i,:),1),rr(E(i,:),2))

end

plot(rr(:,1),rr(:,2),'r*')

hold off;