efault). Leave blank if using <code>station_number</code> argument.</p></dd>


<dt>groups</dt>
<dd><p>Name of column in <code>data</code> that contains unique identifiers for different data sets, if applicable. Only required 
if groups column name is not 'STATION_NUMBER'. Function will automatically group by a column named 'STATION_NUMBER' if 
present. Remove the 'STATION_NUMBER' column beforehand to remove this grouping. Leave blank if using <code>station_number</code> 
argument.</p></dd>


<dt>station_num