isScalarNA

Checks whether object is from <code>(NA, NA_integer, NA_real_, NA_character_, NA_complex_)</code>.

Miscellaneous helper functions for and from B. Bischl and
some other guys, mainly for package development.

Bernd Bischl

<dl><dt>x</dt>
<dd>[any] 
Object to check.</dd></dl>

<dl>

<dt>x</dt>
<dd>[any] 
Object to check.</dd>

</dl>