topocoefficient: Find the topological coefficient of a node in a undirected...
In centiserve: Find Graph Centrality Indices

Description Usage Arguments Details Value Author(s) References Examples

The topological coefficient is a relative measure for the extent to which a node shares neighbors with other nodes.

1	topocoefficient(graph, vids = V(graph))

`graph`	The input graph as igraph object
`vids`	Vertex sequence, the vertices for which the centrality values are returned. Default is all vertices.

Topological coefficient T(n) of a node n with k(n) neighbors defined as:

T(n)=avg(J(n,m))/k(n)

where J(n.m) is defined for all nodes m that share at least one neighbor with n. The value J(n,m) is the number of neighbors shared between the nodes n and m, plus one if there is a direct link between n and m.
Nodes that have one or no neighbors are assigned a topological coefficient of zero.
More detail at Topological Coefficient

A numeric vector contaning the centrality scores for the selected vertices.

Mahdi Jalili m_jalili@farabi.tums.ac.ir

Assenov, Yassen, et al. "Computing topological parameters of biological networks." Bioinformatics 24.2 (2008): 282-284.

1 2	g <- graph(c(1,2,2,3,3,4,4,2), directed=FALSE) topocoefficient(g)

Loading required package: igraph

Attaching package: 'igraph'

The following objects are masked from 'package:stats':

    decompose, spectrum

The following object is masked from 'package:base':

    union

Loading required package: Matrix
[1] 1.0000000 0.6666667 0.8333333 0.8333333