lected tends to become more abundant in the short term.</p>
<div class="sourceCode" id="cb4"><pre class="sourceCode r"><code class="sourceCode r"><span id="cb4-1"><a href="#cb4-1" aria-hidden="true" tabindex="-1"></a>ab.df <span class="ot">&lt;-</span> <span class="fu">as.data.frame</span>(ab)</span>
<span id="cb4-2"><a href="#cb4-2" aria-hidden="true" tabindex="-1"></a>ab.df<span class="sc">$</span>timestep <span class="ot">&lt;-</span> <span class="dv">1</span><span class="sc">:</span><span class="fu">nro