Counting vertices and edges
A lot of basic information about a network can be extracted from an igraph
object. In this exercise you will learn how to count the vertices and edges from a network by applying several functions to the graph object g
.
Each row of the friends dataframe represents an edge in the network.
This is a part of the course
“Network Analysis in R”
Exercise instructions
- Use
V()
andE()
to view the vertices and edges respectively of the network. - Use
gsize()
to count the number of edges in a network. - Use
gorder()
to count the number of vertices in a network.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Load igraph
library(igraph)
# Subset vertices and edges
V(___)
E(___)
# Count number of edges
gsize(___)
# Count number of vertices
____(g)