This example shows an interactive parallel coordinate plot of the Iris dataset, with four axes for sepal length, sepal width, petal length, and petal width. Users can reassign which measurement appears on each axis using React dropdown menus through ReactDropdown. The plot renders polylines as SVG paths using d3.line, with each species colored via a d3.scaleOrdinal. Hovering over a line highlights all lines of the same species by transitioning their stroke and opacity with d3 transitions, while other lines fade to grey.