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Katherine Ognyanova (Katya) • Postdoctoral Research Fellow, The Lazer LabEmail: [email protected] • Website: www.kateto.net • Twitter: @ognyanova
R Network Visualization WorkshopPOLNET 2015, Portland OR
Slide 2 www.kateto.net
Workshop data files, handout & R code: kateto.net/polnet2015
Slide 3 www.kateto.net
Selecting the right network visualization
Slide 4 www.kateto.net
1. Purpose
Slide 5 www.kateto.net
2. Audience
Visualization goals
The network as a map
Key actors and links
Relationship strength
Diffusion patterns
Structural properties
Communities
A B
Some network visualization types
Hive plots
Network Maps
Arc diagrams
Biofabric
Statistical charts
Heat maps
Arc Diagram (R package arcdiagram)
Les Miserables Arc Diagram, Gaston Sanchez 2013
Heatmap (base R, ggplot2)
Liu, Wang, Wang & Xie, PLOS ONE 2014
Hive plot (R package HiveR)
www.hiveplot.net, 2014
Slide 11 www.kateto.net
Network visualization controls
Network visualization controls
Color
Size
Position
Shape
Honorable mention: arrows (direction) and labels (identification)
Layout aesthetics
Minimize edge crossingNo Yes
Prevent overlapNo Yes
Uniform edge lengthNo Yes
SymmetryNo Yes
Slide 14 www.kateto.net
Some network examples
Adoption of topics in the US media system. Source: www.kateto.net
Classic „pretty spaghetti bowl“ network viz
Stability in Afghanistan US military chart, via NYT.com, 2010
Internet Backbone: Each node represents an IP address. Source: Wikipedia
Linking patterns in the US political blogosphere. Source: Adamic & Glance (2005)
Twitter network, @OIIOxford. Source: Hogan, 2011
Wikipedia co-editing patterns among top editors in English. Source: Hogan, 2012
Map of the Web: Nodes represent websites. Source: internet-map.net
Flavor network and the principles of food preparing. Source: Ahn, Ahnert, Bagrow & Barabasi , 2012
Disease network: phenotype and disease gene associations. Source: Diseasome.eu, 2013
Network of Facebook friendships. Source: Facebook.com , 2010
Global Flights Network. Source: www.visualizing.org, 2012
Global Spread of H1N1 and human mobility. Source: gleamviz.org, 2011
Spatiotemporal Processes of Information Diffusion. Source: Cao, Lin, Sun, Lazer, Liu, Qu (2012)
The world according to Democrats in Congress – Lazer, Tsur, Ognyanova 2015
The world according to Republicans Congress – Lazer, Tsur, Ognyanova 2015
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Quick note on network formats
A B C D E
A 0 0 0 0 0
B 1 0 0 0 1
C 1 0 0 1 1
D 0 0 0 0 0
E 0 0 0 0 0
A
CB D
E
Network formats: the Matrix
B A 1
B E 1
C A 1
C E 1
C D 1
A
CB D
E
Source Destination Weight
Note: Weights are optional.
Network formats: the Edgelist
B A E
C A D E
A
CB D
E
Source Destinations
Network formats: the Nodelist
A yellow 1
B green 3
C orange 5
D yellow 3
E blue 1
A
CB D
E
Node ID Attr1 Attr2
Network formats: Node attributes
Network types: adjacency and affiliation
Adjacency(one-mode graph)
Affiliation(two-mode / bipartite graph)
PaulKate
HP
Jill
MS
JohnJim
Paul
Kate
John Jill
Jim
Contact Information:Katherine OgnyanovaE-mail: [email protected]: www.kateto.net
