title: Open some directories recursively in Dired
body: <p>I want to show a directory in Dired with some sub-directories opened recursively (as if I passed "R" option for them). Is it possible to do this in Emacs? Any ideas how to implement this easily in Elisp?</p>
  
  <p>In windows explorer I would press '*' in folders window to open a directory recursively (of course only sub-directories are visible, not files). I want the same thing in Emacs, but that files are visible too.</p>