title: Reading an Excel file into an R dataframe from a zipped folder
body: <p>I have an Excel file (.xls extension) that is inside a zipped folder that I would like to read as a dataframe into R.  I loaded the gdata library and set up my working directory to the folder that houses the zipped folder.</p>
  <p>When I type in the following syntax:</p>
  <pre><code>data_frame1 &lt;- read.xls( unz(&quot;./Data/Project1.zip&quot;,&quot;schools.xls&quot;))
  </code></pre>
  <p>I get the following error messages:</p>
  <blockquote>
  <p>Error in path.expand(xls) : invalid 'path' argument</p>
  <p>Error in file.exists(tfn) : invalid 'file' argument</p>
  </blockquote>
  <p>I'm guessing that I'm missing some arguments in the syntax, but I'm not entirely sure what else needs to be included.</p>
  <p>Thanks for your help!  This R newbie really appreciates it!</p>