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Edge attributes and subsetting

In this exercise you will learn how to add attributes to edges in the network and view them. For instance, we will add the attribute 'hours' that represents how many hours per week each pair of friends spend with each other.

This exercise is part of the course

Network Analysis in R

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Exercise instructions

  • Create a new edge attribute called 'hours' from the vector hours using set_edge_attr().
  • View all edge attributes using edge_attr().
  • View all edges that include the person "Britt".
  • View all edges where the attribute hours is greater than or equal to 4 hours.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

library(igraph)

# View hours
hours

# Create new edge attribute called 'hours'
g <- set_edge_attr(g, ___, value = ___)

# View edge attributes of graph object
___(g)

# Find all edges that include "Britt"
E(g)[[.inc('___')]]  

# Find all pairs that spend 4 or more hours together per week
E(g)[[hours>=___]]
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