Scatter Plot
This example visualizes nuclear bomb test counts from 1945 to 2009, with each circle representing a country’s annual total. The x-axis shows the year, the y-axis shows bomb counts, and colors distinguish six countries, sourced from Johnston’s Archive via a processed CSV. Built with D3 v4, it uses `d3.scaleTime`, `d3.scaleLinear`, and `d3.scaleOrdinal` for scales, plus `d3.legendColor` from d3-legend for the color legend. Interactive features include hover tooltips displaying exact counts, while the SVG rendering updates responsively on window resize.