Three correlation matrices compare eight physical measurements of abalone—Length, Diameter, Height, various weights, and Rings—separated by sex (male, female, infant). Each matrix cell displays the sample correlation coefficient, colored on a blue-red diverging scale from −1 to 1. The visualization loads a CSV dataset via `d3.csv`, computes correlations with `ss.sampleCorrelation` from simple-statistics, and renders SVG rectangles and text labels using D3 v7.