This example visualizes the Zachary Karate Club dataset as an adjacency matrix, displaying node connections as a grid of orange squares. Each row and column represents a node, with filled cells indicating edges between nodes. Hovering over a cell highlights its corresponding row and column, while a tooltip reveals the edge's source-target pair. The code uses D3.js v7 (d3.csv, d3.select) to load the data and render the SVG elements, positioning cells via x and y attributes. A static tooltip appears in the corner, and the visualization includes no interactive filtering or animation.