ls<a class="anchor" aria-label="anchor" href="#details"></a></h2>
    <p>“nb” objects are stored as lists of integer vectors, where the vectors contain either the indices in the range <code>1:n</code> for <code>n</code> as <code>length(nb)</code> of the neighbours of region <code>i</code>, or <code>as.integer(0)</code> to signal no neighbours. The function <code>card(nb)</code> is used to extract the numbers of neighbours from the “nb” object.</p>
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    <div class="section level2">
    <h2 