An edge is a link between two people or entities in a network that can be
directed or undirected. A directed edge has a clear origin and destination: lender > borrower, tweeter > follower. An undirected edge connects two people or entities with a mutual relationship: Facebook friends, teams in a sports league.
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J. Johnston, Colorado State University
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S. Horowitz, Hartford Hospital, Hartford, CT, USA
" I thought this class [Introduction to Statistics 1] was excellent, the material was very understandable, the examples and practice were great, and the teacher is phenomenal! Very happy with this course. "