title: R: Select values from data table in range
body: <p>I have a data table in R:</p>
  
  <pre><code>name    date
  ----    ----
  John    1156649280
  Adam    1255701960
  ...etc...
  </code></pre>
  
  <p>I want to get all of the rows that have a date within a range. In SQL, I might say <code>SELECT * FROM mytable WHERE date &gt; 5 AND date &lt; 15</code></p>
  
  <p>What is the equivalent in R, to select rows based on the range of values in a particular column?</p>