This example correlates daily weather conditions at Logan Airport with flight departure delays. A scatter plot displays maximum temperature on the y-axis, date on the x-axis, and encodes precipitation through color and delay magnitude through circle radius. A separate ring chart shows the same delay data as a circular line and bar plot. The visualization uses d3.csv for data loading, d3.lineRadial for the ring line, and d3.arc for radial bars, all rendered as SVG with D3 v5.