{"version":"1.0","type":"rich","title":"Melting data for multiple lines","description":"This visualization shows changes in world population over time across multiple regions and countries, with each entity represented as a colored line. The chart uses a time-scale x-axis and a reversed linear y-axis to display population values, with a categorical color scale distinguishing the lines. Data is melted from wide-format CSV files into tidy long format before being nested by country name. The implementation relies on d3.csv, d3.nest, d3.scaleTime, d3.scaleLinear, d3.line, and d3.axisBottom/axisLeft, with a custom color legend component rendering as SVG.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/8ab48ead2f26401ab51e7115dc5d0d27?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}