{"version":"1.0","type":"rich","title":"Melting Data for Multiple Lines","description":"This example shows population trends over time by region, with each region represented as a separate colored line. The visualization uses D3 v5 to load and process UN population estimates from CSV files, then melts the data into a tidy format using custom logic. Multiple lines are rendered with d3.line and curveBasis, while an ordinal color scale with a legend distinguishes regions. Axes are drawn using d3.axisBottom and d3.axisLeft, and the chart updates based on nested data sorted by final population values.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/eb2355b27fc64433af33ab764996be38?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}