This example compares two network visualization techniques: a node-link diagram and an adjacency matrix. The node-link diagram uses a force-directed layout with draggable, zoomable nodes, while the adjacency matrix displays connections as colored cells; clicking on matrix cells highlights the corresponding links and nodes in both views. The code uses D3 v3’s `d3.layout.force`, `d3.behavior.zoom`, and SVG circles and lines, with data loaded from a space-separated dataset file.