This visualization displays an adjacency matrix of a network with 410 nodes, using colored rectangles along the x- and y-axes to represent node groups. The matrix cells, rendered as gray squares in both upper and lower triangles, indicate connections between nodes. Built with D3 v4, it uses SVG and animated transitions to resize and reposition matrix elements. A brush interaction on the top axis allows users to select a subset of nodes, triggering a smooth re-scaling of the matrix and axis labels to focus on the selected range.