如何用r计算网络图node betweenness

发布网友发布时间：2022-05-01 22:08

共1个回答

热心网友时间：2022-06-24 04:24

Cb(n) = ∑s≠n≠t (σst (n) / σst),
where s and t are nodes in the network different from n, σst denotes the number of shortest paths from s to t, and σst (n) is the number of shortest paths from s to t that n lies on.
Betweenness centrality is computed only for networks that do not contain multiple edges. The betweenness value for each node n is normalized by dividing by the number of node pairs excluding n: (N-1)(N-2)/2, where N is the total number of nodes in the connected component to which n belongs. Thus, the betweenness centrality of each node is a number between 0 and 1.
For example, the betweenness centrality of node b in Figure7 is computed as follows:
Cb(b) = ((σac(b) / σac) + (σad(b) / σad) + (σae(b) / σae) + (σcd(b) / σcd) + (σce(b) / σce) + (σde(b) / σde)) / 6 = ((1 / 1) + (1 / 1) + (2 / 2) + (1 / 2) + 0 + 0) / 6 = 3.5 / 6 ≈ 0.583