This is a brushable scatter plot matrix of the Iris dataset, showing pairwise relationships among sepal length, sepal width, petal length, and petal width. The matrix uses colored circles to distinguish the three Iris species. Diagonal cells display histograms of each trait, while off-diagonal cells show scatter plots with axes. The visualization uses D3 v4 with linear scales, axes, and brushing to enable interactive exploration. Data is loaded from a CSV file and rendered as SVG elements.