This example shows an interactive dashboard linking a bar chart of export totals for 2019 with a pie chart of category breakdowns by state. Hovering over a bar filters the pie chart and legend to show the proportions of Agricola, Industrial, and Pecuario exports for that state, with mouseout resetting the display to the overall totals. Built with React and D3.js v3, it uses ordinal and linear scales, SVG rectangles and paths, and animated transitions to update the bar heights, text labels, and pie segments.