</span>
<span>  ind.row <span class="op">=</span> <span class="fu">rows_along</span><span class="op">(</span><span class="va">G</span><span class="op">)</span>,</span>
<span>  ind.col <span class="op">=</span> <span class="fu">cols_along</span><span class="op">(</span><span class="va">G</span><span class="op">)</span>,</span>
<span>  nploidy <span class="op">=</span> <span class="fl">2</span>,</span>
<span>  ncores <span class="op">=</span> <span class="fl">1</span></span>
<span><span class="op">)</span></s