ourceLine" id="cb3-12" data-line-number="12"><span class="co">#&gt; [1] "−4" "−3" "−2" "−1" "0"  "1"  "2"  "3"  "4"</span></a></code></pre></div>
</div>
<div id="plots-distinguishable" class="section level3">
<h3 class="hasAnchor">
<a href="#plots-distinguishable" class="anchor"></a>Plots (distinguishable)</h3>
<p>We can see the difference in a plot.</p>
<ul>
<li>Points in group 1 are labeled with a true Unicode minus glyph: <code><a href="reference/signs.html">signs()</a></code>. So is the y-axis: 