iGraph R将边缘ID转换为顶点集

Question

I have an igraph graph object (g) in R:

IGRAPH UN-- 50 159 -- 
attr: name (v/c), weight (e/n)

I need to output a list of vertex pairs for each edge - what is the quickest way to do this?

The edge sequence from E(g) is:

[1]   V11 -- V1  
[2]   V10 -- V2  
[3]   V13 -- V3  
[4]   V34  -- V4  
[5]   V25  -- V4 
...

and I am trying to output:

[1]   11 1
[2]   10 2
[3]   13 3
[4]   34 4
[5]   25 4

Answer 1

Use get.edgelist , eg:

> library(igraph)
> g <- erdos.renyi.game(5, 0.3)
> get.edgelist(g)
     [,1] [,2]
[1,]    2    4
[2,]    3    4
[3,]    2    5
[4,]    3    5
[5,]    4    5