de> data frame above.</li>
<li>
<code><a href="https://tidyr.tidyverse.org/reference/gather.html" class="external-link">tidyr::gather</a></code> the columns to obtain a tidy data frame
of matrices.</li>
<li>Use <code>expand_to_tidy</code> to create a tidy data frame of
matrix elements, similar to <code>etas_forgraphing</code> above.</li>
<li>Plot and report results as demonstrated by the graph above.</li>
</ul>
<p>Data frames of matrices, such as those created by
<code>matsindf</code>, are like magic spread