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colour and size legends

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KKurt J Nilsen
Last edited Aug 4, 2020
Created on Aug 3, 2020

This example demonstrates two separate SVG legends: a color legend using an ordinal scale mapping fruit names to distinct colors, and a size legend using a square-root scale with circular marks whose radii encode numeric values. The color legend renders colored circles for each category, while the size legend displays five ticks with proportional circle sizes and labels offset by the scaled radius. Both legends use reusable functions (`colorLegend` and `sizeLegend`) built with D3 v5, leveraging `selectAll`, `enter`, `merge`, and `exit` for data joins, with SVG elements styled via CSS.

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