My apologies if I was not clear enough, TRUE & NA could be either TRUE or FALSE and consequently is NA. why is FALSE & NA = FALSE? NA could be TRUE or FALSE, so FALSE & NA should be NA?
On Fri, May 19, 2017 at 2:13 PM, Rolf Turner <r.tur...@auckland.ac.nz> wrote: > On 20/05/17 00:01, Jérémie Juste wrote: > >> Hello, >> >> Rolf said, >> >> TRUE & FALSE is FALSE but TRUE & TRUE is TRUE, so TRUE & NA could be >> either TRUE or FALSE and consequently is NA. >> >> OTOH FALSE & (anything) is FALSE so FALSE & NA is FALSE. >> >> >> According to this logic why is >> >> FALSE & NA >> >> [1] FALSE >> > > Huh???? > > > cheers, > > Rolf Turner > > -- > Technical Editor ANZJS > Department of Statistics > University of Auckland > Phone: +64-9-373-7599 ext. 88276 > -- Jérémie Juste [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.