如何在igraph R中获取选定边的顶点

Question

How do I get the index of the two vertices of a selected edge, using the graph package in R?

set.seed(5)
g <- igraph::erdos.renyi.game(1000, 1/1000)
E(g)[100]

This returns

+ 1/473 edge from e82dd81:
[1] 112--483

What I would like to have returned is 112 . How do I do that?

Answer 1

We can try

get.edgelist(g)[100,]
#[1] 112 483
get.edgelist(g)[100,][1]
#[1] 112

Or

get.edges(g, es = 100)[,1]
#[1] 112

Answer 2

Another way:

as.integer(V(g)[inc(E(g)[100])][1]) # get vertices incident on an edge
#[1] 112