matlab code truss structures
ndex = [2connectivity(i,1)-1, 2connectivity(i,1), ... 2connectivity(i,2)-1, 2connectivity(i,2)]; d_local = displacements(index); c = cosines(i,1); s = cosines(i,2); delta_disp = [-c, -s, c, s] d_local; memberForces(i) = (AE /