lass="sourceCode r"><span id="cb4-1"><a href="#cb4-1"></a><span class="kw"><a href="https://rdrr.io/r/graphics/plot.html">plot</a></span>(quakes[<span class="kw"><a href="https://rdrr.io/r/base/c.html">c</a></span>(<span class="st">"long"</span>, <span class="st">"lat"</span>)], <span class="dt">xlim =</span> <span class="kw"><a href="https://rdrr.io/r/base/c.html">c</a></span>(<span class="dv">120</span>, <span class="dv">190</span>))</span>
<span id="cb4-2"><a href="#cb4-2"></a><span class="kw"><a href=".