<span class="co"># install</span>
<span class="fu"><a href="https://rdrr.io/r/utils/install.packages.html" class="external-link">install.packages</a></span><span class="op">(</span><span class="st">"nat"</span><span class="op">)</span>
<span class="co"># use</span>
<span class="kw"><a href="https://rdrr.io/r/base/library.html" class="external-link">library</a></span><span class="op">(</span><span class="va"><a href="https://github.com/natverse/nat" class="external-link">nat</a></span><span class="op">)</spa