# sample_motifs

From igraph v1.0.0
by Gabor Csardi

##### Graph motifs

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

##### Usage

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

##### Arguments

- 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.

##### Details

`sample_motifs`

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

##### Value

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

##### See Also

Other graph motifs: `count_motifs`

,
`graph.motifs.no`

;
`graph.motifs`

, `motifs`

##### Examples

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

*Documentation reproduced from package igraph, version 1.0.0, License: GPL (>= 2)*

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