ion in HDF5 file size, but the internal space can be re-used for
other datasets later.</p>
<div class="sourceCode" id="cb38"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va">flights.grp</span><span class="op">$</span><span class="fu">link_delete</span><span class="op">(</span><span class="st">"wind_dir"</span><span class="op">)</span></span>
<span><span class="va">flights.grp</span><span class="op">$</span><span class="fu">ls</span><span class="op">(</span><span class="op