Week 6 - Centrality and Centralization

Dad Joke

Can you believe my wife told me to quit acting like a flamingo?

I had to put my foot down.

Housekeeping

  • Homework questions in #homework-help on Discord
    • How to copy and paste code

Concept Review

  • What is centrality?
  • What is the difference between centrality and centralization?
  • What is degree centrality?
  • What are some shortcomings of degree centrality as a measure of power/influence?
  • What is betweenness centrality?
  • What is closeness centrality?
  • What is eigenvector centrality?

Concept Review

  • What aspects of power/influence do centrality measures miss?
  • What can centralization tell us about a network?
  • What does density tell us about a network?
  • What is hierarchy?

Practical Review

What is the degree/closeness/betweenness centrality of node A?

Practical Review

What is the degree/closeness/betweenness centrality of node A?

G |>
  mutate(degree = centrality_degree(),
         closeness = centrality_closeness(),
         betweenness = centrality_betweenness()) |>
  filter(name == "A")
# A tbl_graph: 1 nodes and 0 edges
#
# An unrooted tree
#
# Node Data: 1 × 4 (active)
  name  degree closeness betweenness
  <chr>  <dbl>     <dbl>       <dbl>
1 A          3     0.143         0.5
#
# Edge Data: 0 × 2
# ℹ 2 variables: from <int>, to <int>

Discussion Questions

R Review