D3 Selection exercise

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D3 Selection exercise

✓ Published2🌍 Public

Last edited Nov 27, 2023

Created on Nov 27, 2023

This example demonstrates D3 selection and data-join concepts through an animated line chart with pulsating circles. The visualization renders two stacked SVG layers, with the lower layer drawing a sine wave using `d3.line` and the upper layer displaying circles whose radii scale with their y-position and x-coordinate. Colors cycle through a rainbow palette based on each circle's vertical position. Using `d3.select`, `d3.range`, and sequential joins, the code updates the visualization at 60 frames per second via `setInterval`, with transitions on circle fill attributes creating smooth color changes.

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