D3 Selections

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D3 Selections - Exercise

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Last edited Jan 13, 2023

Created on Jan 10, 2023

This example demonstrates D3 selections and data joins by rendering a dynamic set of colored circles on an SVG canvas. The code generates data with `makeData`, producing evenly spaced circles with vertical sine-wave positioning, then binds it to the visualization using `selectAll` and the `.join()` pattern. Each circle receives random radius, fill color, and positioning attributes through D3’s selection API. The visualization relies on D3 7.8.0 and React, with the `vizData` function handling the enter-merge-update cycle for the circle elements.

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

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