ittr.tidyverse.org/reference/pipe.html" class="external-link">%&gt;%</a></span></span></span>
<span class="r-in"><span>  <span class="fu"><a href="spread_rvars.html">spread_rvars</a></span><span class="op">(</span><span class="va">b</span><span class="op">[</span><span class="va">i</span>,<span class="op">]</span>, <span class="va">tau</span><span class="op">[</span><span class="va">i</span><span class="op">]</span><span class="op">)</span></span></span>
<span class="r-in"><span><span class="va">rvar_df</sp