Characteristics of the fraction of three different edge direction sets in the directed networks.

<p>(a-c) ER network under different average degree 〈<i>k</i>〉. (d-f) SF network with <i>γ</i> = 2.5 under different average degree 〈<i>k</i>〉. The grey columns represent the real edges in the original directed networks <i>G</i> or nodes with weight 1 in the corresponding network <i>H</i>, while the green columns imply the non-real edges in <i>G</i> or nodes with weight 0 in <i>H</i>. The number of nodes is 10³.