[R] [FORGED] Logical Operators' inconsistent Behavior
pdalgd at gmail.com
Fri May 19 15:00:24 CEST 2017
> On 19 May 2017, at 14:24 , Jérémie Juste <jeremiejuste at gmail.com> wrote:
> 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?
At the risk of flogging a dead horse:
FALSE & TRUE = FALSE
FALSE & FALSE = FALSE
FALSE & x = FALSE, whatever the value of x, hence
FALSE & NA = FALSE
> On Fri, May 19, 2017 at 2:13 PM, Rolf Turner <r.turner at auckland.ac.nz>
>> On 20/05/17 00:01, Jérémie Juste wrote:
>>> 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
>>>  FALSE
>> Rolf Turner
>> Technical Editor ANZJS
>> Department of Statistics
>> University of Auckland
>> Phone: +64-9-373-7599 ext. 88276
> Jérémie Juste
> [[alternative HTML version deleted]]
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