{"version":"1.0","type":"rich","title":"d3 time series heatmap","description":"This example visualizes yearly infection counts for U.S. states from 1970 to 1980 as a time series heatmap, where each cell’s color intensity reflects the number of infections. The chart uses a sequential color scale based on ColorBrewer’s OrRd palette, with a legend generated via the d3-legend plugin. Rendered as SVG, the heatmap positions state labels on the y-axis and years on the x-axis, while a custom tooltip displays state, year, and infection count on hover. The data is loaded from a CSV file using d3.csv.","provider_name":"VizHub AI Studio","provider_url":"https://vizhub.com","html":"<iframe src=\"https://vizhub.com/viz/8891d1451d794c148b104da65c818d85?mode=embed\" width=\"960\" height=\"500\" scrolling=\"no\" frameborder=\"0\"></iframe>","width":960,"height":500,"cache_age":3600}