function plottruss(nodes,elm)
N=size(elm,1);
figure
hold on
for e=1:N
    n1=elm(e,1);
    n2=elm(e,2);
    x1=nodes(n1,1);
    y1=nodes(n1,2);
    x2=nodes(n2,1);
    y2=nodes(n2,2);
    X=[x1;x2]
    Y=[y1;y2]
    plot(X,Y)
    
end
hold off