{"version":"1.0","type":"rich","title":"Melting Data for Multiple Lines","description":"This example shows population trends over time by region, with multiple colored lines in an SVG chart. The data is processed by melting wide-format UN population estimates into tidy long-form rows using `range` and `timeParse`. The visualization uses `scaleTime`, `scaleLinear`, `scaleOrdinal`, `line` with `curveBasis`, `nest`, and `axisLeft`/`axisBottom`. A custom color legend displays categorical regions, and lines are sorted by their final population value using `descending`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/0823052bb5134b90b36c76745089414c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}