{"version":"1.0","type":"rich","title":"Selecting a Year on a Line Chart","description":"This visualization shows United Nations population projections from 1950 to 2100 for world regions as a multi-line chart. The year 2018 is initially marked by a vertical line, and moving the mouse across the chart updates the selected year, which moves the line and adjusts the highlighted point. The chart uses d3.line, d3.scaleTime, d3.scaleLinear, and d3.axisLeft/Bottom to render the SVG, with data from two CSV files melted into a single dataset. A d3.scaleOrdinal with schemeCategory10 colors each region, and a custom colorLegend component displays the categories.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/63572c6ff86e44c088477ad29916de58?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}