m</span><span class="op">)</span><span class="op">]</span></span>
<span><span class="va">DT</span> <span class="op">&lt;-</span> <span class="fu"><a href="https://rdrr.io/r/base/unique.html" class="external-link">unique</a></span><span class="op">(</span><span class="va">DT</span><span class="op">)</span></span></code></pre></div>
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<h2 id="references">References<a class="anchor" aria-label="anchor" href="#references"></a>
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