</span><span class="fu"><a href="https://dplyr.tidyverse.org/reference/filter.html" class="external-link">filter</a></span><span class="op">(</span><span class="va">trx</span>, <span class="va">investor</span> <span class="op">==</span> <span class="st">"QZ621"</span><span class="op">)</span> <span class="co"># transactions</span>
<span class="va">mkt_QZ621</span> <span class="op">&lt;-</span> <span class="fu">dplyr</span><span class="fu">::</span><span class="fu"><a href="https://dplyr.tidyverse.org/refere