{"version":"1.0","type":"rich","title":"Lesson 3","description":"An interactive stacked bar chart displays purchase quantities of various grocery items across years, with controls for filtering by year, month, or week. The visualization uses NVD3’s `multiBarChart` with stacked bars, driven by D3.js for rendering and transitions. Data comes from a local JSON file containing product names and yearly values, while a sidebar offers radio buttons and dropdowns to adjust the temporal granularity. The chart updates its axes and bar groups based on the selected period, integrating SVG rendering for crisp visuals.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/baf48bc10d1141d89fa4f5ad59103921?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}