This example shows a smoothed radar chart comparing three mobile phone brands across eight attributes such as battery life, brand, and price. Three colored polygons represent iPhone, Samsung, and Nokia, with circular grid lines and labeled axes. The chart is built with D3.js version 5, using `d3.scaleOrdinal` for colors and `d3.scaleLinear` for the radial scale. The code sets `roundStrokes` to true, producing cardinal-closed curved paths for the area and stroke of each blob.