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circular layout
In graph drawing, a circular layout is a style of drawing that places the vertices of a graph on a circle, often evenly spaced so that they form the vertices of a regular polygon.
==Applications==
Circular layouts are a good fit for communications network topologies such as star or ring networks,〔.〕 and for the cyclic parts of metabolic networks.〔.〕 For graphs with a known Hamiltonian cycle, a circular layout allows the cycle to be depicted as the circle, and in this way circular layouts form the basis of the LCF notation for Hamiltonian cubic graphs.〔.〕
A circular layout may be used on its own for an entire graph drawing, but it also may be used as the layout for smaller clusters of vertices within a larger graph drawing, such as its biconnected components,〔; .〕 clusters of genes in a gene interaction graph,〔.〕 or natural subgroups within a social network.〔.〕 If multiple vertex circles are used in this way, other methods such as force-directed graph drawing may be used to arrange the clusters.〔.〕
One advantage of a circular layout in some of these applications, such as bioinformatics or social network visualization, is its neutrality:〔.〕 by placing all vertices at equal distances from each other and from the center of the drawing, none is given a privileged position, countering the tendency of viewers to perceive more centrally located nodes as being more important.〔.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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