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Understanding Graphs: Nodes, Edges, and Relationships in Social Networks

Explore the structure of graphs in social networks based on research by Peter Bearman, James Moody, and Katherine Stovel. Learn about nodes, edges, and operations on graphs, with a focus on adolescent romantic and sexual networks.

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Understanding Graphs: Nodes, Edges, and Relationships in Social Networks

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  1. Graphs Ruth Anderson CSE 140 University of Washington

  2. A graph contains nodes and edges Chicago Seattle Salt Lake City San Francisco Dallas

  3. + 350 students in no romantic and/or sexual relationship From: “Chains of Affection: The Structure of Adolescent Romantic and Sexual Networks”, American Journal of Sociology,by Peter Bearmanof (Columbia), James Moody (Ohio State), and Katherine Stovel (U. of Washngton);

  4. Graphs • A graph can be thought of as either of: • a collection of edges • Each edge represents some relationship • for each node, a collection of neighbors • The neighbors are those connected by an edge

  5. Operations on a graph Creation: • Create an empty graph Querying: • Look up a node: Does it exist? What are its neighbors? • Look up an edge (= a pair of nodes): does it exist? (You know the nodes it connects.) • Iterate through the nodes or edges Modification: • Add/remove a node • Add/remove an edge

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