an class="op">&lt;-</span> <span class="va">Etas</span> <span class="op"><a href="../reference/pipe.html">%&gt;%</a></span> </span>
<span>  <span class="fu"><a href="https://tidyr.tidyverse.org/reference/gather.html" class="external-link">gather</a></span><span class="op">(</span>key <span class="op">=</span> <span class="va">matrix.names</span>, value <span class="op">=</span> <span class="va">matrix</span>, <span class="va">eta</span><span class="op">)</span> <span class="op"><a href="../reference/pipe.ht