Exercise

# 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.

Instructions

**100 XP**

- Use
`V()`

and`E()`

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.