igraph manipulate graphs

getbasicinfo.R

## check out the vertices and the order
V(g)
#output:
# + 7/7 vertices, named, from bd40644:
# [1] 1 2 3 4 5 6 7 8

vcount(g)
# [1] 8

## check out the edges and the size
E(g)
# + 10/10 edges from bd40644 (vertex names):
# [1] 1--2 1--3 1--7 2--3 2--4 3--4 3--5 7--4 7--6 7--8 4--5 4--6 5--6 5--8

ecount(g)
# [1] 14

## summary
g$name <- "undirected graph"
print_all(g)
# IGRAPH 50df64b UN-- 8 14 -- undirected graph
# + attr: name (g/c), name (v/c)
# + edges (vertex names):
# 1 -- 2, 3, 7
# 2 -- 1, 3, 4
# 3 -- 1, 2, 4, 5
# 7 -- 1, 4, 6, 8
# 4 -- 2, 3, 7, 5, 6
# 5 -- 3, 4, 6, 8
# 6 -- 7, 4, 5
# 8 -- 7, 5
# 7 -- 4, 6