connectance: Connectance of a graph

In clementviolet/omnivor: Ecological Networks Analysis

Description

Proportion of all possible links that are realized. In a directed unipartite network C = \frac{L}{S^2}, in a directed newtork where species cannot interact with themselves C = \frac{L}{S(S-1)}. In undirected newtork, if species cannot interact with themselves C = \frac{L}{S\frac{S-1}{2}} otherwise C = \frac{L}{S\frac{S-1}{2}}. Where L is the number of links and S the number of species.

Usage

connectance(graph, loops = TRUE, directed = TRUE)

Arguments

graph	an igraph object.
loops	logical: are species able to interact with themselves?
directed	logical: are interactions directed?

Value

numeric: the value of the connectance.

References

Delmas, E., Besson, M., Brice, M.-H., Burkle, L. A., Dalla Riva, G. V., Fortin, M.-J., … Poisot, T. (2019). Analysing ecological networks of species interactions. Biological Reviews.

Examples

data(aleutian)

connectance(aleutian)

connectance(aleutian, loops = FALSE)

connectance(aleutian, directed = FALSE)

clementviolet/omnivor documentation built on Aug. 16, 2019, 12:05 a.m.