title: how to split time into hours?
body: <p>I have a dataframe that contains how many seconds a user has spent on a certain webpage(task) as follows:</p>
  <pre><code>UserID  Page1   Page2   Page3 ....
  24      2789    2375    574 
  39      3745    3800    4567
  35      100     300     1005
  .
  .
  .
  </code></pre>
  <p>I want to have these seconds split into hours as follows so I can know on which page every user was during a certain hour of his/her navigation of the site:</p>
  <pre><code>UserID  Hour1     Hour2     Hour3  ....
  24      Page1     Page1     Page2 
  39      Page1     Page2     Page3
  35      Page1     Page1     Page1
  .
  .
  .
  </code></pre>