{"version":"1.0","type":"rich","title":"Population and age","description":"This visualization shows the U.S. population distribution across age groups from 2010 to 2019, using a slider to animate between years. It renders an SVG bar chart with D3 v4, where each bar’s height and color encode population size via `d3.scaleLinear` and `d3.scaleQuantile`. Transitions smoothly update bars and axes over two seconds. Data is loaded from ten CSV files using `d3.queue` and `d3.csv`. The code relies on D3’s `scaleBand`, `axisBottom`, `axisLeft`, and `transition` APIs.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/c3d2efcb250c4a4c991f19921e37cf0f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}