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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.

Deze oefening maakt deel uit van de cursus

Network Analysis in R

Cursus bekijken

Oefeninstructies

  • 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.

Praktische interactieve oefening

Probeer deze oefening eens door deze voorbeeldcode in te vullen.

# Load igraph
library(igraph)

# Subset vertices and edges
V(___)
E(___)

# Count number of edges
gsize(___)

# Count number of vertices
____(g)
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