title: How to convert specific time format to timestamp in R?
body: <p>I am working on "Localization Data for Person Activity Data Set" dataset from UCI and in this data set there is a column of date and time(both in one column) with following format: </p>
  
  <pre><code>27.05.2009 14:03:25:777
  27.05.2009 14:03:25:183
  27.05.2009 14:03:25:210
  27.05.2009 14:03:25:237
  ...
  </code></pre>
  
  <p>I am wondering if there is anyway to convert this column to timestamp using R.</p>