span class="dt">start =</span> <span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/c">c</a></span>(<span class="dv">120</span>, <span class="dv">210</span>, <span class="dv">300</span>, <span class="dv">400</span>),</a>
<a class="sourceLine" id="cb3-9" data-line-number="9">                <span class="dt">end =</span> <span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/c">c</a></span>(<span class="dv">125</span>, <span class="dv">240</span>, <span class="d