## Return an adjacency matrix for a square lattice.

### Description

Return an adjacency matrix for a square lattice.

### Usage

adjacency.matrix(m, n = NULL)


### Arguments

 m the number of rows in the lattice. n the number of columns in the lattice. Defaults to NULL. If missing, the lattice is assumed to be m by m.

### Details

This function builds the adjacency matrix for the m by n square lattice.

### Value

A matrix A of 0s and 1s, where A_{ij} is equal to 1 iff vertices i and j are adjacent.

[Package copCAR version 2.0-4 Index]