This scatter plot matrix compares all numeric fields of the classic Iris dataset, with colors distinguishing the three iris species. The visualization displays a 4×4 grid of scatter plots, each pairing two measurements, enabling multivariate comparison. Implemented as a vanilla JavaScript fork using D3 v6, the code leverages `d3.csv` to load the data, `scaleLinear` for axes, `scaleOrdinal` with `schemeSet1` for colors, and `axisLeft`/`axisBottom` for chart decorations. The SVG rendering divides the window into four quadrants, with each plot’s radius and opacity fixed for clarity.