d3js workshop - circles

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d3js workshop - circles

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Last edited Oct 19, 2017

Created on Oct 19, 2017

Three circles render in an SVG across a 720-by-120 canvas, each initially positioned along the x-axis with a fixed radius and vertical center. The example demonstrates D3’s data-join pattern, binding an array of tuples to circle elements and setting their `cx` attributes based on index. A chained transition then animates each circle sequentially, with a one-second delay between starts, over two seconds changing the fill color to the tuple’s second value, increasing the radius to 17, and shifting the y-coordinate to 80. The code uses d3.v3 selection, `.data()`, `.enter()`, `.append()`, and `.transition()` with `.delay()` and `.duration()`.

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