rnal-link">head</a></span><span class="op">(</span><span class="op">)</span> <span class="op"><a href="https://magrittr.tidyverse.org/reference/pipe.html" class="external-link">%&gt;%</a></span> <span class="fu">dummy_dt</span><span class="op">(</span><span class="va">vs</span>,<span class="va">am</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span>      mpg   cyl  disp    hp  drat    wt  qsec    vs    am  gear</span>
<span class="r-out co"><span class="r-pr