="ts_mutate.html">ts_mutate</a></span><span class="op">(</span>mutation_rate <span class="op">=</span> <span class="fl">1e-8</span><span class="op">)</span></span></span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># extract the genotype matrix (this could take  a long time consume lots</span></span></span>
<span class="r-in"><span><span class="co"># of memory!)</span></span></span>
<span class="r-in"><span><span class="va">gts</span> <span class="op">&lt;-</span> <span