d_tsv</span><span class="op">(</span><span class="va">meta.file</span><span class="op">)</span><span class="op">)</span>
    <span class="va">S</span> <span class="op">=</span> <span class="fu"><a href="https://rdrr.io/r/base/lapply.html">lapply</a></span><span class="op">(</span><span class="fu"><a href="https://rdrr.io/r/base/unique.html">unique</a></span><span class="op">(</span><span class="va">M</span><span class="op">$</span><span class="va">sample</span><span class="op">)</span>, <span class="kw">fun