in the file name</span></a>
<a class="sourceLine" id="cb4-22" data-line-number="22">    tracker[j,] &lt;-<span class="st"> </span><span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/c">c</a></span>(<span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/unlist">unlist</a></span>(<span class="kw"><a href="https://www.rdocumentation.org/packages/base/topics/strsplit">strsplit</a></span>(<span class="kw"><a href="https://www.rdocumentation.org/packages/base/topic