May 2019
Beginner to intermediate
650 pages
14h 50m
English
Content preview from Learn D3.js
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Adjacency matrices
An adjacency matrix is common way to represent links between nodes in a network. It's a square matrix with n rows and n columns representing the same nodes (vertices), where each element represents a link (edge) between nodes in one direction. With n2 elements, it can be used for directed graphs containing self-referencing loops. With all zeros on its diagonal, the remaining n*(n - 1) values represent a directed graph without loops (all edges connect different vertices). Undirected graphs (including trees) are represented by symmetric or triangular matrices with n*(n - 1) / 2 distinct values.
Networks are usually represented as weighted adjacency matrices, where each element not only reveals if the two nodes are connected ...
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