MD Counties Radial Stacked Bar
A radial stacked bar chart displays the population of Maryland counties partitioned by age group. Each county occupies one annular sector, with the length of each colored segment representing the population count for a specific age bracket. The chart uses D3 v4 APIs including `d3.scaleBand` for angular positioning, a custom `d3.scaleRadial` for radial scaling, `d3.arc` for path geometry, and `d3.stack` to build stacked segments. Data is loaded from a CSV file containing county-level population figures, rendered as SVG, with a legend identifying the age categories.
AI-generated descriptionThis is a radial variant of my earlier example stacked bar chart. While pretty, you probably don’t want to use this version because it’s easier to compare the bars when they share an aligned (linear) axis. You might consider this form if your ordinal axis is cyclical, such as weeks of the year, and you want to show a cyclical pattern. This example’s data is not cyclical, so the use of a radial form here is rather gratuitous!
forked from <a href='http://bl.ocks.org/mbostock/'>mbostock</a>'s block: <a href='http://bl.ocks.org/mbostock/6fead6d1378d6df5ae77bb6a719afcb2'>Radial Stacked Bar</a>