Marks and Channels
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A small multiples grid of five D3.js plots demonstrates how the same dataset—the numbers zero through four—can be encoded through different visual channels. Each panel isolates a single mark or channel: x-position, y-position, size, length, shape, and hue, using circles, rectangles, and paths. The code uses D3’s selection and join API within a custom viz.js orchestrator, rendering SVG directly. Shape encoding leverages d3.symbol() with symbolsFill, while hue applies schemeCategory10.
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