This example displays a 4x4 scatter plot matrix comparing all numeric fields of the iris dataset, with each point colored by species using the `schemeSet1` palette. Built as a React application using D3 v6, it renders SVG circles with `scaleLinear` and `scaleOrdinal` scales, and draws axes via `axisLeft` and `axisBottom` for every pairwise combination. The data is loaded as CSV and parsed dynamically, with chart titles appearing only on the diagonal cells.