te with
<code>n</code> unique values (like the <code>row.names</code> of a
<code>data.frame</code> object); <code>n</code> is the number of spatial
entities. Component <code>i</code> of this list contains the integer
identifiers of the neighbours of <code>i</code> as a sorted vector with
no duplication and values in <code>1:n</code>; if <code>i</code> has no
neighbours, the component is a vector of length <code>1</code> with
value <code>0L</code>. The <code>nb</code> object may contain an
attribute indicati