{"version":"1.0","type":"rich","title":"d3.js learning","description":"A stacked column chart displays weekly data for six users across six weeks, with each column segment colored per user and labeled by date. Built with D3 v3's stack layout, the chart renders as SVG with axes and gridlines. Hovering over any segment reveals a tooltip that tracks the mouse position, showing the exact value. The chart is constructed using a margin convention, ordinal x-scale for dates, and linear y-scale for cumulative sums.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-d08b60bf754013506371a8de5eef255f?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}