title: Reading a specific file from a .tar file via readRDS
body: <p>Suppose I have a file <code>data.tar</code> and within this <code>.tar</code> file I have a file, called <code>file_1.rds</code>. Is there a way to read <code>file_1.rds</code> (via <code>readRDS()</code>) without first untaring <code>data.tar</code>.</p>