{"version":"1.0","type":"rich","title":"Melting Data for Multiple Lines","description":"This visualization shows population change over time for multiple world regions, displayed as separate colored lines on a line chart. The data is processed by melting a wide-format CSV file into a tidy format and concatenating historical estimates with medium-variant projections. The code uses d3.csv, d3.nest, d3.line, and d3.curveBasis to generate the paths, with d3.axisBottom and d3.axisLeft for the axes. A d3.scaleOrdinal color scheme distinguishes regions, and a custom colorLegend component renders the categorical legend.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/0f062003bf794fbaacca89b98775f53d?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}