Networks

Question 1

How can a network structure be represented?

Answer 1

It can be represented with a node-link diagram, items are nodes

Question 2

Which visualization can be used to represent network structures? (2)

Answer 2

1. Node-link diagram (network graphs, graphs)

2. Matrix representation

Question 3

Networks are one of the four visualization types in our framework, list the other 3.

Answer 3

1. Table
2. Graph
3. Map

Question 4

Which properties can network graph have? (4)

Answer 4

1. Cycles
2. Direction
3. Degree (number of links connected)
4. Weights

Question 5

Who invented concept maps? (why am I so sure this question will come up in the exam?)

Answer 5

Joseph D. Novak

Question 6

What is the use for concept maps?

Answer 6

They help visualize relationships between concepts

They are used to stimulate the generation of ideas, aid creativity

Question 7

What is the starting point for a mind map?

Answer 7

A central, key concept

Question 8

List 9 types of node-link graphs:

Answer 8

1. Network graphs
2. Concept maps
3. Mind maps
4. Flowcharts
5. Complex network data
6. Force-directed graph
7. Chord diagram
8. Arc chart
9. Public transport charts

Question 9

What are the main issues when rendering a node-link graph? (4)

Answer 9

1. Determine node position in the space
2. Represent links
3. High number of nodes
4. Represent the type of interaction

Question 10

Identify the network type by it’s adjacency matrix:

A. 1 0 B. 0 2 C. 0 1 D. 0 1 E. 0 0.5
0 0 0 0 0 0 1 0 2 0

1. Undirected 2. Self-loops 3. Multigraph 4. Directed 5. Weighted 6. Complete graph

Answer 10

The answers are (A, 2), (B, 3), (C, 4), (D, 1 and 6), (E, 5)

Question 11

What is NicheWorks?

Answer 11

An interactive tool for visualizing massive networks with hundreds of
thousands of nodes

Question 12

Why in subway diagrams geographical references are missing?

Answer 12

For compactness and since they are useless to the reader

Question 13

Which of these statements on creating network charts in Tableau is correct?

1. Tableau does not natively support network diagrams, it’s therefore impossible to do
2. Tableau has a default integration method to create network diagrams, so you can create them automatically.
3. You can manually create a network diagram with pre-processing and dual-axis.

Answer 13

The answer is 3, after adequate pre-processing, you can visualize a network graph in Tableau by using dual-axis and dimensions, one Y dimension will use a line mark for the edge between two nodes, whereas the other duplicate Y will use a circle representing the node itself.