{"version":"1.0","type":"rich","title":"Multiple Line plot with Dropdown","description":"This interactive line chart visualizes monthly average PM2.5 and PM10 particulate levels across London from January 2010 to August 2018, using a dropdown menu to compare different air quality measurements. Built with D3 v5, the visualization renders smooth time-series lines using `d3.line()` and `d3.curveBasis`, with axes scaled via `d3.scaleTime()` and `d3.scaleLinear()`. The dropdown, implemented through a custom menu component, triggers smooth transitions (1500ms) as the Y-axis data changes. Color-coded by year, the chart includes a D3 ordinal color legend, while the dataset originates from the Kings College London Air Quality Dataset in the London Datastore.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/b5edb790d1054b3597eed7d439f7662c?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}