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19 - legends: color & size - dataviz 2018

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Zzach b.
Last edited Jan 5, 2022
Created on Jan 4, 2022

Two custom legends demonstrate ordinal color and quantitative size encodings in D3 v7. The color legend uses `scaleOrdinal` to map fruit categories to distinct fills, while the size legend uses `scaleSqrt` to map numeric ticks to circle radii. Both are rendered as SVG groups with circle and text elements, updated through D3’s selection-merging API. The example highlights reusable legend construction patterns within a single static visualization.

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datraviz 2018 #19 - legends: color & size

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