title: Log file processing with R
body: <p>I have just found out about R, which seems to be the ideal tool to get statistics on webserver logfiles. I have looked into several libs like <code>zoo</code> and <code>plyr</code>, but none of them offer a straight forward solution to aggregate timestamped data. </p>
  
  <p>Is there any R lib or a tutorial or a documentation which focuses on analyzing log file like data? Which emphasize on aggregating the time in slices? </p>
  
  <p>Possible usecases:</p>
  
  <ul>
  <li>average request time per day</li>
  <li>average requests per session per day</li>
  <li>get the slowest requests this week</li>
  <li>...</li>
  </ul>