{"version":"1.0","type":"rich","title":"27_Temp Chart - Melting Data for Multiple Lines","description":"This multi-line chart visualizes population over time by region, with lines sorted by their final values and a categorical color legend. The code uses D3 v5 with scalable vector graphics, employing `d3.nest` to group data, `d3.scaleTime` and `d3.scaleLinear` for axes, and `d3.curveBasis` to smooth line paths. Data is loaded via `d3.csv` from UN population estimates, melted from wide to long format.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/1ef522e19805417ba6ea98746ad558d0?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}