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Melting Data for Multiple Lines

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Jjlspangl
Last edited Oct 14, 2021
Created on Oct 14, 2021

This chart shows projected population growth by region from 1950 to 2100, with each line representing a different world region and colored via a categorical scale. The data is sourced from UN population estimates, loaded from two CSV files and melted into a tidy format. The visualization uses d3.line with curveBasis to smooth the paths, d3.nest to group data by region, and d3.scaleTime and d3.scaleLinear for axes. A custom colorLegend component renders circles and labels in SVG, while axis gridlines and a title complete the layout.

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This line chart shows one week of temperature (in degrees Celcius) in cities around the world. The data comes from Data Canvas - Sense Your City.

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