# R igraph manual pages

Use this if you are using igraph from R

## Sample a pair of correlated G(n,p) random graphs

### Description

Sample a new graph by perturbing the adjacency matrix of a given graph and shuffling its vertices.

### Usage

```sample_correlated_gnp_pair(n, corr, p, directed = FALSE, permutation = NULL)
```

### Arguments

 `n` Numeric scalar, the number of vertices for the sampled graphs. `corr` A scalar in the unit interval, the target Pearson correlation between the adjacency matrices of the original the generated graph (the adjacency matrix being used as a vector). `p` A numeric scalar, the probability of an edge between two vertices, it must in the open (0,1) interval. `directed` Logical scalar, whether to generate directed graphs. `permutation` A numeric vector, a permutation vector that is applied on the vertices of the first graph, to get the second graph. If `NULL`, the vertices are not permuted.

### Details

Please see the reference given below.

### Value

A list of two igraph objects, named `graph1` and `graph2`, which are two graphs whose adjacency matrix entries are correlated with `corr`.

### References

Lyzinski, V., Fishkind, D. E., Priebe, C. E. (2013). Seeded graph matching for correlated Erdos-Renyi graphs. https://arxiv.org/abs/1304.7844

`sample_correlated_gnp`, `sample_gnp`.
```gg <- sample_correlated_gnp_pair(n = 10, corr = .8, p = .5,