This gallery example presents a smoothed radar chart comparing smartphone attributes across three brands, using a dataset that scores features like battery life, brand, and price. The visualization displays aggregated values as colored, rounded polygons on a circular grid, with level labels and axes indicating value scales. The chart is built with D3.js version 3.5.6, using `<svg>` elements for rendering, a linear scale for radius, and an ordinal color scale to distinguish the three data series. The code includes a glow filter and calculates the maximum domain from the data to ensure all values fit within the plot.