D3 Selection Exploration （Cleaner Version)

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D3 Selection Exploration （Cleaner Version)

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Last edited Dec 30, 2022

Created on Dec 29, 2022

A clean demonstration of D3 data joins and update patterns, this example animates 15 circles moving vertically with oscillating radii. The visualization separates data generation from rendering: `makeData` computes positions using trigonometric functions, while `vizData` applies the enter-update-exit pattern via `selection.join()`. Built with React and D3 v6, it uses `select`, `range`, and `setInterval` to drive a 60fps animation, rendering circles as SVG elements with dynamic `cx`, `cy`, and `r` attributes.

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A bare minimum HTML page demonstrating use of CSS and JavaScript.

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