This example shows a scatter plot of the Iris dataset, mapping petal length on the x-axis and sepal length on the y-axis. It uses D3 v7’s `csv` loader and `scaleLinear` for both axes, with `axisLeft` and `axisBottom` to render tick marks. The SVG circles are bound to data via `selectAll('circle').data().join('circle')`. The code loads data from a GitHub gist and sizes the chart to the full window, with margins and a fixed point radius of 5 pixels.