label</span>(a,0)<br>&gt;&gt; <span style="color: rgb(51, 102, 255);">label</span>(a,<span style="color: rgb(204, 51, 204);">'Signal'</span>)<br></pre>
Similarly, the axes can be assigned labels with<br>
<pre style="margin-left: 40px;">&gt;&gt; <span style="color: rgb(51, 102, 255);">xlabel</span>(a, <span style="color: rgb(204, 51, 204);">'a new X axis label'</span>);              <span style="font-style: italic;">% second axis (columns)</span> ,or 1st axis for 1D objects<br>&gt;&gt; <span style="color: rg