{"version":"1.0","type":"rich","title":"Melting Data for Multiple Lines","description":"This example shows population over time by region for the world, displaying multiple smooth lines on a chart with a color legend to distinguish regions. The data is melted from a wide CSV format into tidy rows, combining historical estimates from 1950 to 2014 with medium-variant projections from 2015 to 2100 from the UN. The chart uses D3 v5’s `scaleTime`, `scaleLinear`, `scaleOrdinal`, `line` with `curveBasis`, `nest` for grouping by region, and custom axis and legend components. Lines are rendered as SVG paths with a multiply blend mode, and the axis labels use custom formatting for population values.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/01ad71fb8e784b3892e60804c2fc5679?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}