{"version":"1.0","type":"rich","title":"Melting Data for Multiple Lines","description":"This visualization shows global population trends from 1950 to 2100, using multiple lines to compare different development groups. A vertical reference line marks the year 2018, and a color legend identifies each series. The chart is built using D3 v5, with data loaded from two CSV files and melted into a tidy format. It uses `d3.scaleTime`, `d3.scaleLinear`, and `d3.line` to render the line paths, with axes generated by `d3.axisLeft` and `d3.axisBottom`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/d2471c708c544c7db00a93e15ba9d312?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}