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Last edited Feb 25, 2020

Created on Feb 25, 2020

This visualization displays a stacked area chart showing how three groups contribute to a total value over time, with each group’s portion layered on top of the previous one. The data, loaded from a CSV file, is processed using `d3.nest()` to group entries by year, then `d3.stack()` to compute the stacked series. The chart uses `d3.scaleLinear` for both axes, an ordinal color scale for group differentiation, and `d3.area()` paths to render the filled regions. The visualization is built with D3 v4 and rendered as SVG within a React framework.

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A bare minimum HTML page.

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