This visualization demonstrates matrix reordering to reveal clusters in network connectivity data. It loads a TSV file from GitHub, converts the edge list into an adjacency matrix, and applies the barycenter heuristic from the reorder.js library to permute rows and columns, grouping connected nodes. D3.js fetches the data and constructs the matrix, while the reorder.js functions `mat2graph`, `barycenter_order`, `permute`, and `transpose` handle the optimization. The resulting grid displays ones for existing links, with reordering making dense connection patterns visually apparent.