Use this if you are using igraph from R
Summing up the edge weights of the adjacent edges for each vertex.
strength(graph, vids = V(graph), mode = c("all", "out", "in", "total"), loops = TRUE, weights = NULL)
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 |
A numeric vector giving the strength of the vertices.
Gabor Csardi csardi.gabor@gmail.com
Alain Barrat, Marc Barthelemy, Romualdo Pastor-Satorras, Alessandro Vespignani: The architecture of complex weighted networks, Proc. Natl. Acad. Sci. USA 101, 3747 (2004)
degree
for the unweighted version.
g <- make_star(10) E(g)$weight <- seq(ecount(g)) strength(g) strength(g, mode="out") strength(g, mode="in") # No weights, a warning is given g <- make_ring(10) strength(g)