{"version":"1.0","type":"rich","title":"d3 Dispatch V4","description":"This example demonstrates linked selections across a bar chart and a pie chart, using a drop-down menu to choose a state. It shows how the D3 `dispatch` module (V4) coordinates custom events like `statechange` across separate visual components. The bar chart uses `d3.scaleLinear` and `d3.axisLeft` to display total state population, while the pie chart uses `d3.pie`, `d3.arc`, and `transition.attrTween` for animated arcing by age group. Data comes from a CSV of US census age demographics, loaded with `d3.csv` and processed via `d3.map`.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/b3bb3a5671a2417c9ab4ace0daaf6c08?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}