[R] tests for NULL objects

Benilton Carvalho bcarvalh at jhsph.edu
Wed Nov 29 23:20:41 CET 2006

Hi Everyone,

After searching the subject and not being successful, I was wondering  
if any you could explain me the idea behind the following fact:

all(NULL == 2)  ## TRUE
any(NULL == 2) ## FALSE

Thanks a lot,


Benilton Carvalho
PhD Candidate
Department of Biostatistics
Johns Hopkins University

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