title: Using `fread` to import csv file from an archive into `R` without extracting to disk
body: <p>I have a zip archive with several csv files in it. I would like to use fread to import selected csv files into <code>R</code>.</p>
  <p>With <code>read.csv</code> I can get the data as follows without extracting the archive.</p>
  <pre><code>con &lt;- unz(&quot;myarchive.zip&quot;, &quot;file2.csv&quot;)
  file2 &lt;- read.csv(con, sep = &quot;,&quot;, stringsAsFactors = FALSE)
  on.exit(close(con))
  </code></pre>
  <p>How to use <code>data.table::fread</code> to import the the data in the csv file into <code>R</code> from the archive without extracting it?</p>