A fork of a force-directed graph links a node-link diagram with an adjacency matrix. The code uses `d3.forceSimulation` with `forceLink`, `forceManyBody`, and `forceCenter` to position nodes and links from the `infect-dublin.edges` dataset, rendered as SVG circles and lines. Clicking a node or matrix cell highlights its corresponding links and row/column with a distinct color, while `d3.zoom` and a custom `drag` function enable panning, scaling, and node repositioning. Colors map node groups via a predefined palette, and each matrix cell’s fill opacity reflects edge weight.