title: How do you use time as an axis in a Core Plot graph?
body: <p>I have two arrays <code>arr1</code> and <code>arr2</code> containing datetime in <code>dd/MM/yyyy HH:mm:ss</code> and <code>HH:mm:ss</code> respectively.</p>
  
  <p>For eg. <code>arr1[0]</code> contains <code>23/12/2011 09:15:30</code> while <code>arr2[0]</code> contains <code>09:15:30</code>.</p>
  
  <p>Note that <code>arr1</code> will always contain today's date, which is exactly what I want for my iPad app which I'm preparing using Xcode 4.2.</p>
  
  <p>I want to plot specific time (either from <code>arr1</code> or from <code>arr2</code> whichever is best suitable) on the X axis and corresponding float value contained in an array <code>arr3</code> on Y-axis.</p>
  
  <p>Now I'm stuck at plotting time on X axis as I can't pass time in <code>dd/MM/yyyy HH:mm:ss</code> or <code>HH:mm:ss</code>.</p>
  
  <p>I googled about it and got the suggestion to use <code>epoch</code> but I'm unable to implement it for my app.</p>
  
  <p>Other than using <code>epoch</code>, how can I pass a time value to Core Plot for the X axis?</p>