This visualization displays a scatter plot matrix of cardio patient data from the UCI Machine Learning Repository, organized as a grid of 21 columns and 2 rows. Each cell plots one variable against another, with points colored by the nominal `Class` field. The visualization uses the vega-lite-api to construct the chart, with panzoom enabled for zooming via the Alt key. Users can select outliers by Ctrl-clicking points, which highlights them in red through the `selectPoint` parameter. The chart is rendered with d3.v7 and vega-lite 5.2.0.