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Visual Exploration of Complex Time-Varying Graphs

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3 Author(s)
Archambault, D. ; British Columbia Univ., Vancouver, BC ; Munzner, T. ; Auber, D.

Quasi-trees, namely graphs with tree-like structure, appear in many application domains, including bioinformatics and computer networks. Our new SPF approach exploits the structure of these graphs with a two-level approach to drawing, where the graph is decomposed into a tree of biconnected components. The low-level biconnected components are drawn with a force-directed approach that uses a spanning tree skeleton as a starting point for the layout. The higher-level structure of the graph is a true tree with meta-nodes of variable size that contain each biconnected component. That tree is drawn with a new area-aware variant of a tree drawing algorithm that handles high-degree nodes gracefully, at the cost of allowing edge-node overlaps. SPF performs an order of magnitude faster than the best previous approaches, while producing drawings of commensurate or improved quality

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Visualization and Computer Graphics, IEEE Transactions on  (Volume:12 ,  Issue: 5 )