lass="num">1</span>, <span class="num">2</span>) == Vec(<span class="num">2</span>,<span class="num">3</span>)</pre><p>The <code>at</code> method returns an instance of a <a href="scalar/Scalar.html" class="extype" name="org.saddle.scalar.Scalar">org.saddle.scalar.Scalar</a>, which behaves
much like an <code>Option</code> in that it can be either an instance of <a href="scalar/NA$.html" class="extype" name="org.saddle.scalar.NA">org.saddle.scalar.NA</a>
or a <a href="scalar/Value.html" class="extype" name="