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The TimeRadarTrees [uni-trier.de] data visualization technique can be used to represent weighted dynamic compound digraphs, which express a sequence of directed and weighted graphs where the nodes correspond to leaves in a hierarchy.

The TimeRadarTrees approach shows the information hierarchy as a traditional node-link diagram, but in a radial style. Each graph is represented as a slice on the inner circle and corresponding slices on the smaller outer circles, which are called thumbnails. The inner circle shows the incoming edges, the thumbnails represent the outgoing edges.

The available example screenshots center around various soccer statistics.

Via Visual Complexity.