title: R: Read single file from within a tar.gz directory
body: <p>Consider a tar.gz file of a directory which containing a lot of individual files.</p>
  
  <p>From within R I can easily extract the name of the individual files with this command:</p>
  
  <pre><code>fileList &lt;- untar(my_tar_dir.tar.gz, list=T)
  </code></pre>
  
  <p><strong>Using only R</strong> is it possible to directly read/load a single of those files into R (aka without first unpacking and writing the file to the disk)?</p>