layout_forcedirected(
    ejectFactor = 6,
    condenseFactor = 3,
    maxtx = 4,
    maxty = 3,
    dist.threshold = "30,250",
    size = "1000,1000",
    iterations = 20000,
    time.step = 1E-05,
    algorithm = ['degree_weighted','group_weighted','edge_weighted']);