ce_byname</a></span><span class="op">(</span><span class="fu"><a href="https://matthewheun.github.io/matsbyname/reference/transpose_byname.html" class="external-link">transpose_byname</a></span><span class="op">(</span><span class="va">V</span><span class="op">)</span>, <span class="va">U</span><span class="op">)</span>,</span>
<span>    <span class="co"># Need to change column name and type on y so it can be subtracted from row sums of W</span></span>
<span>    err <span class="op">=</span> <span class="fu