Mark Myatt mark at myatt.demon.co.uk
Mon Jul 1 15:50:05 CEST 2002

Remigijus Lapinskas <remigijus.lapinskas at maf.vu.lt> writes:
>Hello R-help,
>My vector aa has some NA's:
>> aa_c(NA,1)
>> aa=="NA"
>[1]    NA FALSE
>> aa==NA
>[1]   NA   NA
>How can I detect NA's?
>In other words, I would like my answer to be TRUE  FALSE.


Mark Myatt

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