This example combines a force-directed node-link diagram with an adjacency matrix visualization, allowing interactive exploration of network connectivity. Clicking a node in the diagram highlights its corresponding row and column in the matrix, while clicking a matrix cell reports the presence or absence of a link between the two nodes. The code uses d3.forceSimulation for layout, d3.zoom for panning and scaling, and SVG circles and rectangles for rendering. Data appears to be loaded from an external CSV or TSV source, and the interface supports dragging nodes and dynamically updating matrix highlights in response to selections.