This visualization displays a correlation matrix for the Abalone dataset, using three side-by-side heatmaps to compare different variable groupings. Hovering over a cell highlights it and displays the exact correlation value in the text area below. The implementation uses D3.js scales for color and positioning, `jz.arr.correlationMatrix` for computing correlations, and renders the matrix with SVG rectangles and circles, where the upper triangle uses colored circles to represent correlation strength.