ifications, e.g.
<code>format = "%d/%m/%Y"</code>. When a format is supplied, it must match the
complete string.</p></dd>


<dt id="arg-na">na<a class="anchor" aria-label="anchor" href="#arg-na"></a></dt>
<dd><p>Column-specific vector of strings that should be interpreted as missing
values (in addition to those specified at dataset level)</p></dd>


<dt id="arg-aggregate-by-each-category">aggregate_by_each_category<a class="anchor" aria-label="anchor" href="#arg-aggregate-by-each-category"></a></dt>
<dd><p>