title: How do I plot time (HH:MM:SS) in X axis in R
body: <p>I have tried to read through stackoverflow, blogs, books etc but have been unable to find the answer on plotting time in the x-axis in the following format(HH:MM:SS.000) in R and another quantity on the y-axis. I have the following dataset:</p>
  
  <pre><code>Time             EcNo
  12:54:09.000    -14.47
  12:54:10.000    -17.96
  12:54:11.000    -15.97
  12:54:12.000    -14.61
  12:54:13.000    -12.68
  12:54:14.000    -10.73
  12:54:15.000    -10.54
  12:54:16.000    -11.62
  12:54:17.000    -12.49
  12:54:18.000    -11.12
  </code></pre>
  
  <p>How would I plot EcNo on Yaxis vs Time(x axis) in the format HH:MM:SS.000 as shown above.</p>
  
  <p>I honestly would appreciate some help. 
  many thanks</p>