nce ts</span></span></span>
<span class="r-in"><span><span class="fu">ts_fst</span><span class="op">(</span><span class="va">ts</span>, sample_sets <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/list.html" class="external-link">list</a></span><span class="op">(</span>afr <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/c.html" class="external-link">c</a></span><span class="op">(</span><span class="st">"AFR_1"</span>, <span class="st">"AFR_2"</span>, <spa