igraph label vertices

representationsofgraph.R

## Adjacency list
adjlist <- get.adjlist(g)
adjlist[1]
# $Adam
# + 3/8 vertices, named, from 50df64b:
# [1] Judy  Bobby Sam  

## Edge list
as.data.frame(get.edgelist(g))
#       V1    V2
# 1   Adam  Judy
# 2   Adam Bobby
#      ... ...
# 13   Jay   Tom
# 14   Jay Jerry

## Adjacency matrix
# alternatively "as_adjacency_matrix(g)"
get.adjacency(g) 
# 8 x 8 sparse Matrix of class "dgCMatrix"
#       Adam Judy Bobby Sam Frank Jay Tom Jerry
# Adam     .    1     1   1     .   .   .     .
# Judy     1    .     1   .     1   .   .     .
# Bobby    1    1     .   .     1   1   .     .
# Sam      1    .     .   .     1   .   1     1
# Frank    .    1     1   1     .   1   1     .
# Jay      .    .     1   .     1   .   1     1
# Tom      .    .     .   1     1   1   .     .
# Jerry    .    .     .   1     .   1   .     .