graph.strength

0th

Percentile

Strength or weighted vertex degree

Summing up the edge weights of the adjacent edges for each vertex.

Keywords
graphs
Usage
graph.strength (graph, vids = V(graph), mode = c("all", "out", "in", "total"),
      loops = TRUE, weights = NULL)
Arguments
graph
The input graph.
vids
The vertices for which the strength will be calculated.
mode
Character string, out for out-degree, in for in-degree or all for the sum of the two. For undirected graphs this argument is ignored.
loops
Logical; whether the loop edges are also counted.
weights
Weight vector. If the graph has a weight edge attribute, then this is used by default. If the graph does not have a weight edge attribute and this argument is NULL, then a warning is given and
Value

  • A numeric vector giving the strength of the vertices.

References

Alain Barrat, Marc Barthelemy, Romualdo Pastor-Satorras, Alessandro Vespignani: The architecture of complex weighted networks, Proc. Natl. Acad. Sci. USA 101, 3747 (2004)

See Also

degree for the unweighted version.

Aliases
  • graph.strength
Examples
g <- graph.star(10)
E(g)$weight <- seq(ecount(g))
graph.strength(g)
graph.strength(g, mode="out")
graph.strength(g, mode="in")

# No weights, a warning is given
g <- graph.ring(10)
graph.strength(g)
Documentation reproduced from package igraph, version 0.5.2-2, License: GPL (>= 2)

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