th the center of a population boundary at</span></span></span>
<span class="r-in"><span><span class="co"># [200, 800] and a radius of 100 distance units, 1000 individuals at time 1</span></span></span>
<span class="r-in"><span><span class="co"># occupying a map just specified</span></span></span>
<span class="r-in"><span><span class="va">pop1</span> <span class="op">&lt;-</span> <span class="fu"><a href="population.html">population</a></span><span class="op">(</span><span class="st">"pop1"</span>, N <span c