Reference index / 추세·시간 차트
Stacked Area Chart
Shows total size and series contributions over time as stacked areas.
Try the example
When to use it
Use when designing trends & time and selecting analytical visualizations.
Caveats and distinctions
Middle layers are harder to compare because their baseline moves.
Implementation and classification
데이터 시각화 / 추세·시간 차트
Sources and verification status
https://vega.github.io/vega-lite/examples/
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