adjacency.matrix: 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.
Value
A matrix \(A\) of 0s and 1s, where \(A_{ij}\) is equal to 1 iff vertices \(i\) and \(j\) are adjacent.
Details
This function builds the adjacency matrix for the m by n square lattice.