[R] How to test for NULL?

chenxh007 chenxh007 at gmail.com
Thu Apr 24 23:28:06 CEST 2008


Olivier Lefevre wrote:
> x == NULL returns logical(0) instead of FALSE or TRUE as you might expect 
> and I cannot find the right way to write this test in R.
> Thanks in advance for any hint,
> -- O.L.
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