{"version":"1.0","type":"rich","title":"Melting Data for Multiple Lines","description":"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.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d365a35b85274c3ab361c4923b72941a?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}