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.

Nasa/shuttle_eddy	Nasa/skirt	ND/nd12k	ND/nd24k	ND/nd3k
ND/nd6k	Nemeth/nemeth01	Nemeth/nemeth02	Nemeth/nemeth03	Nemeth/nemeth04
Nemeth/nemeth05	Nemeth/nemeth06	Nemeth/nemeth07	Nemeth/nemeth08	Nemeth/nemeth09
Nemeth/nemeth10	Nemeth/nemeth11	Nemeth/nemeth12	Nemeth/nemeth13	Nemeth/nemeth14