"></a></h2>
    <p>Partial matches to the <code>item</code> value are handled by calling <code><a href="https://rdrr.io/r/base/pmatch.html" class="external-link">pmatch()</a></code>. This
can be convenient, with <code>item="tem"</code> and <code>item="temperature"</code> having the same
effect. However, it can also be confusing for labels that are similar.
For example, there are 5 variants of oxygen concentration.
It is best to unabbreviated values, especially in non-interactive work.</p>
<p>The list of kno