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Melting Data for Multiple Lines

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Iinroadings
Last edited Apr 1, 2020
Created on Mar 24, 2020

This example visualizes COVID-19 death counts over time for seven countries, with each country represented as a colored line and labeled at its final data point. The chart uses a linear time scale for days since the 10th death and a linear scale for death counts, with axes and a color legend rendered by custom D3 functions. The code loads CSV data, processes it, and uses `d3.nest` to group by country, `d3.line` with `curveBasis` for smooth paths, and `d3.scaleOrdinal` for colors. The visualization is rendered as SVG with D3 v5.

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