igraph: sample_motifs – R documentation

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sample_motifs

Graph motifs

Graph motifs are small connected subgraphs with a well-defined structure. These functions search a graph for various motifs.

sample_motifs(
  graph,
  size = 3,
  cut.prob = rep(0, size),
  sample.size = vcount(graph)/10,
  sample = NULL
)

`graph`	Graph object, the input graph.
`size`	The size of the motif, currently 3 and 4 are supported only.
`cut.prob`	Numeric vector giving the probabilities that the search graph is cut at a certain level. Its length should be the same as the size of the motif (the `size` argument). By default no cuts are made.
`sample.size`	The number of vertices to use as a starting point for finding motifs. Only used if the `sample` argument is `NULL`.
`sample`	If not `NULL` then it specifies the vertices to use as a starting point for finding motifs.

sample_motifs estimates the total number of motifs of a given size in a graph based on a sample.

A numeric scalar, an estimate for the total number of motifs in the graph.

g <- barabasi.game(100)
motifs(g, 3)
count_motifs(g, 3)
sample_motifs(g, 3)

Network Analysis and Visualization

v1.2.10

GPL (>= 2)

Authors

See AUTHORS file.

Initial release