{"version":"1.0","type":"rich","title":"Drawing One Circle","description":"This example renders a single circle centered within an SVG element created by D3’s selection join pattern. The program uses `d3.select` and the `join` method to manage both the SVG and circle, setting the circle’s `cx` and `cy` attributes to the container’s measured width and height. Its primary purpose is demonstrating an immutable update structure, as described in the README, where state changes follow Redux-style patterns. The visualization does not respond to mouse events; it shows a static, fixed-radius circle.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"","width":960,"height":500,"cache_age":3600}