SNA
Demo data transformation
Two mode networks
• Affiliation or membership network
– A set of actors, and a second set of events or
activities to which the actors in the first set attend
or belong.
• Dyadic two-mode network
– Relations in a two-mode network measure ties
between the actors in one set and actors in a
second set
Bipartite graph
Two mode data
Modality
• A data set that contains information about
two types of social entities (e.g. person and
organizations) is a two mode network
– Individuals, group, organization, community,
institution, society
Two-mode data
• For example:
- - Participants of the same project
- Membership in the same organization
- Attendance at the same meetings
- Graduates of the same university
Affiliation Network
• Putting context into the network by showing
connections to activities, companies,
organizations, neighborhoods, etc.
Sue
Chess Club
Affiliations
or foci
Bill
Band
• Bipartite graph: every edge joins two nodes
belonging to different sets (actors vs. foci)
Two-mode affiliation network and its one –
mode projection
Top row represents four teams and the bottom row represents the teams’
Members (e.g. co-authors on a paper or artists that make a show.
Teammates are members of a fully linked clique (e.g. ABC, BCD, CE, and DF)
Connections form between agents on separate teams when links like (BC) connect
The ABC, BCD, and CE teams.
Data>ntu _100_2mode
NetDraw>File>Open>UCINET>Two Mode
From two mode to one mode
• Data>Affiliations
Dots stand for thesis committees
a, b, c stand for faculty members
Two mode-one mode with Gephi
• Data source
– Node list 2
– Edge list 2
Two mode transformation with Gephi
Two mode transformation with Gephi
Members vs. institutes
Two mode transformation with Gephi
Save into a Gephi file before transformation
Two mode transformation with Gephi
Two mode transformation with Gephi
Two mode transformation with Gephi