 <ul class="dropdown-menu" aria-labelledby="dropdown-articles">
<li><a class="dropdown-item" href="../articles/about-vector-arguments.html">About Vector Arguments</a></li>
    <li><a class="dropdown-item" href="../articles/aggregation-vignette.html">Aggregation in `matsbyname`</a></li>
    <li><a class="dropdown-item" href="../articles/applybyname-vignette.html">Writing Custom Functions for `matsbyname`</a></li>
    <li><a class="dropdown-item" href="../articles/using-summarise-in-matsbyname.html">Using sum