lass="anchor" aria-label="anchor" href="#ref-usage"></a></h2>
    <div class="sourceCode"><pre class="sourceCode r"><code><span><span class="fu">connectivity</span><span class="op">(</span></span>
<span>  <span class="va">host</span>,</span>
<span>  <span class="va">indices</span>,</span>
<span>  global <span class="op">=</span> <span class="cn">FALSE</span>,</span>
<span>  east <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  west <span class="op">=</span> <span class="cn">NULL</span>