This example visualizes the Iris Dataset with a scatter plot that maps petal width to the x-axis, sepal length to the y-axis, and encodes the iris species using different symbols. Built with D3 v6, it uses `scaleLinear`, `scaleOrdinal`, `symbol`, and `axisLeft`/`axisBottom` to render SVG paths for the marks and axes. The plot fills the entire browser window, with margins adjusted for labels. The code is structured as a reusable `scatterPlot` function that accepts configuration for data, dimensions, and value selectors.