title: Plotting data against time in R
body: <p>I have a data frame with one column as date/time(stored internally as numeric) and other columns as numeric/integer and I want to plot data against date/time.  </p>
  
  <p>Date/time in the data frame was populated using the following.  </p>
  
  <pre><code>as.POSIXct(strptime(time, '%H:%M:%S %p %m/%d/%Y',tz='GMT')) 
  </code></pre>
  
  <p><code>class(table$time)</code> is <code>numeric</code>. </p>
  
  <ol>
  <li>How do I plot and show the data in x axis as readable date time in some format. </li>
  <li>How do I plot subset of rows and not all rows Ex: rows between <code>dateTime1</code> and <code>dateTime2</code> where <code>dateTime1</code> and <code>dateTime2</code> are date given in a certain format. </li>
  </ol>