title: Time duration with lack of formatting from excel behaving strangely in R
body: <p>I have data in an excel spreadsheet, I'm importing it using <code>XLConnect</code>.</p>
  
  <p>One column has duration data that was recorded like this: m:ss 
  R is displaying it as a strange date. </p>
  
  <p>Here's a sample of my data:</p>
  
  <pre><code>2:21
  6:08
  0:39
  13:51
  </code></pre>
  
  <p>Here's a how R is interpreting it:</p>
  
  <pre><code>"1899-12-31 02:21:00"
  "1899-12-31 06:08:00"
  "1899-12-31 00:39:00"
  "1899-12-31 13:51:00"
  </code></pre>
  
  <p>Any idea how I can get are to interpret it as duration of m:ss? </p>
  
  <p>EDIT: I want to compare, graph, and preform some mathematics on these times. Any idea </p>