SNA Demo data transformation Two mode networks Affiliation

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_2 mode Net. Draw>File>Open>UCINET>Two Mode

From two mode to one mode • Data>Affiliations ØDots stand for thesis committees Øa, 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