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Selecting a Year on a Line Chart

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Ggabcoderboi
Last edited Jan 5, 2021
Created on Jan 3, 2021

This line chart visualizes projected global population by region from 1950 to 2100, using UN population estimates and medium-variant projections. A vertical black line marks a selected year, and moving the mouse across the chart updates the selection, re-rendering the visualization. The code uses d3.scaleTime, d3.scaleLinear, d3.line with curveBasis, and d3.nest for grouping, with SVG rendering and a color legend. Data is loaded via d3.csv from two datasets and processed through a custom melt function.

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