This example displays the classic Iris dataset as an SVG scatterplot, plotting petal width against sepal length. The visualization uses D3’s `scaleLinear`, `axisLeft`, and `axisBottom` to map data values to pixel coordinates and render labeled axes. Data is loaded asynchronously with `csv()` and parsed to numeric fields. Circles are drawn using D3’s `selectAll().data().join()` pattern, with the plot sized to fill the browser window.