   1     1     1     1     1     1</span></span></code></pre>
<p>Let us replace one row. Currently, vector-recycling is not enabled,
so you have to ensure that your replacements have the correct size.
Recycling may be enabled in the future.</p>
<div class="sourceCode" id="cb32"><pre class="downlit sourceCode r">
<code class="sourceCode R"><span><span class="va">wind_dir_ds</span><span class="op">[</span><span class="fl">1</span>, <span class="op">]</span> <span class="op">&lt;-</span> <span class="fu"><a hr