A gallery of large graphs

Graph visualization is a way to discover and visualize structures in complex relations. What sort of structures are people who do large scale computation studying? We can get a glimpse by visualizing the thousands of sparse matrices submitted to the University of Florida Sparse Matrix collection. The resulting gallery contains the drawing of graphs as represented by 1890 sparse matrices in this collection. Each of these sparse matrices (for rectangular matrix, an augmented matrix is formed first) is viewed as the adjacency matrix of an undirected graph, and is laid out by a multilevel graph drawing algorithm. If the graph is disconnected, then the largest connected component is drawn. The largest graph has 8863287 vertices and 44185251 edges. A simple coloring scheme is used: if the matrix has real entries, coloring is based on the entry value, otherwise it is based on the edge length.

HB/bcsstk16	HB/bcsstk17	HB/bcsstk18	HB/bcsstk19	HB/bcsstk20
HB/bcsstk21	HB/bcsstk22	HB/bcsstk23	HB/bcsstk24	HB/bcsstk25
HB/bcsstk26	HB/bcsstk27	HB/bcsstk28	HB/bcsstk29	HB/bcsstk30
HB/bcsstk31	HB/bcsstk32	HB/bcsstk33	HB/bcsstm01	HB/bcsstm02