Intro D3 Workshop

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Intro D3 Workshop

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Last edited Feb 8, 2018

Created on Feb 8, 2018

Fifty red circles radiate from the center of an SVG canvas, each sized by a random count value and positioned by distance from a clicked circle. Clicking a circle increments its count and re-renders the layout, animating all circles to new positions via `transition()` over 800 milliseconds. The example uses D3 v4 scales (`d3.scaleSqrt`, `d3.scaleLinear`) to map counts to circle radius and color, with a color gradient from steelblue to red based on proximity to the clicked circle. A gray ring backdrop and trigonometric positioning complete the interactive workshop demo.

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