r1         120   250          0
## 3     3 c     chr2         300   350          2
## 4     4 d     chr1         260   450          1</code></pre>
<div class="sourceCode" id="cb9"><pre class="sourceCode r"><code class="sourceCode r"><a class="sourceLine" id="cb9-1" data-line-number="1"><span class="kw"><a href="../reference/genome_cluster.html">genome_cluster</a></span>(x1, <span class="dt">by=</span><span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/c">c</a></span>(<span class="s