{"version":"1.0","type":"rich","title":"fresh block","description":"This example shows a donut chart that visualizes categorical data as percentage-labeled arcs, with each slice colored from a seven-color ordinal scale. The visualization is built with D3 v4, using `d3.pie` to compute arc angles, `d3.arc` for both the filled slices and their labels, and `d3.scaleOrdinal` for coloring. Data is loaded from a CSV file via `d3.csv`, with values parsed to numbers and percentages calculated relative to the total. The SVG rendering positions labels using `labelArc.centroid`, and the chart is centered on a 960×500 canvas.","provider_name":"VizHub AI Studio","provider_url":"https://next.vizhub.com","html":"<iframe src=\"https://next.vizhub.com/viz/gist-58bda4212b3140361b5caeb9d5faefd7?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"1\"></iframe>","width":960,"height":500,"cache_age":3600}