Practicals

1 Create small network

Create a directed network shown on the figure below. Mind the labels of the nodes.

2 Mutual ties

Transform the network created above to an undirected network such that an undirected tie is present if and only if there are reciprocated ties in the original network. Visualize the network and check the correctness of the result.

3 Histograms of degree distributions

Compute the degree distributions (in-, out- and total) for the classroom network and visualize it with a barchart.

4 Sociality and popularity

Check whether popularity in the classroom is associated with sociality. We will measure popularity with in-degree and sociality with out-degree. Answer the question by

• Creating a scatterplot showing the association between in- and out-degrees.
• Compute the correlation coefficient between the two.

5 Other centrality measures

Select two other centrality measures. Are they highly correlated as well? What two measures would have the lowest correlation?

• Compute the correlation coefficient between the two.
• Plot the network with one measure represented in size and the other in color

6 Popularity in Faux Mesa High

Look at the school liking” network faux.mesa.high. Who is the most popular boy? and girl? What grades are they in?

• find the specific nodes
• plot the network with grade colored by node and size by indegree, shape by sex

Solutions

A version of this document with solutions can be found here.