Learning D3.JS 5.0 9.1: What Is a Tree Diagram?

The video tutorial introduces tree diagrams, explaining their purpose and how they represent hierarchical data. It covers the tree layout, which is part of a family of hierarchical layouts, and highlights its advantage in visually representing relationships that are difficult to describe textually. The tutorial also explains the concepts of nodes and links, essential components of tree diagrams, and prepares viewers for coding a collapsible tree diagram in the next video.

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