tage of missing values allowed in each hour to keep the hourly aggregated value in the output object of this function. In other words, if the percentage of missing values in a given hour is larger or equal than <code>na.rm.max</code> the corresponding hourly value will be <code>NA</code>.</p></dd>

  <dt>dates</dt>
<dd><p>numeric, factor, POSIXct or POSIXt object indicating how to obtain the dates and times for each column of <code>x</code> (e.g., gauging station) <br>
If <code>dates</code> is a number, it 