"><a href="https://matthewheun.github.io/matsbyname/reference/difference_byname.html" class="external-link">difference_byname</a></span><span class="op">(</span><span class="fu"><a href="https://matthewheun.github.io/matsbyname/reference/rowsums_byname.html" class="external-link">rowsums_byname</a></span><span class="op">(</span><span class="va">W</span><span class="op">)</span>, </span>
<span>                            <span class="fu"><a href="https://matthewheun.github.io/matsbyname/reference/rowsums_by