atrix</a></span><span class="op">(</span></span></span>
<span class="r-in"><span>      <span class="fu"><a href="https://rdrr.io/r/stats/Poisson.html" class="external-link">rpois</a></span><span class="op">(</span><span class="fl">30</span>, lambda <span class="op">=</span> <span class="fl">5</span><span class="op">)</span>, nrow <span class="op">=</span> <span class="fl">15</span>, ncol <span class="op">=</span> <span class="fl">20</span>,</span></span>
<span class="r-in"><span>      dimnames <span class="