I tried on my computer. > (1+ 0i)^ NA [1] NaN+NaNi
On Thu, Nov 17, 2016 at 3:42 PM, Bert Gunter <bgunter.4...@gmail.com> wrote: > On Nov 17, 2016 11:55 AM, "Thierry Onkelinx" <thierry.onkel...@inbo.be> > wrote: > > > > Dear Da, > > > > NA represents an unknown value x. 1 ^ x = 1 for all possible values of x. > > Hence 1 ^ NA = 1. > > > That is false. For any n, n-1 of the nth roots of 1 differ from 1(they are > complex). I don't have my computer with me. What does (1+ 0i)^ NA give? > > Bert > > > Best regards, > > > > ir. Thierry Onkelinx > > Instituut voor natuur- en bosonderzoek / Research Institute for Nature > and > > Forest > > team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance > > Kliniekstraat 25 > > 1070 Anderlecht > > Belgium > > > > To call in the statistician after the experiment is done may be no more > > than asking him to perform a post-mortem examination: he may be able to > say > > what the experiment died of. ~ Sir Ronald Aylmer Fisher > > The plural of anecdote is not data. ~ Roger Brinner > > The combination of some data and an aching desire for an answer does not > > ensure that a reasonable answer can be extracted from a given body of > data. > > ~ John Tukey > > > > 2016-11-17 20:19 GMT+01:00 Da Zheng <zhengda1...@gmail.com>: > > > > > Hello, > > > > > > I just realized that 1^NA outputs 1 while 1.1^NA outputs NA in R > v3.3.1 and > > > R v3.2.3. > > > I tried other values such as 0^NA and 2^NA, and they all output NA. > > > I don't understand this inconsistency here. Shouldn't 1^NA output NA as > > > well? Why does R handle it differently? Or is this a bug in these > > > particular versions of R? > > > > > > Thanks, > > > Da > > > > > > [[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. > > > > > > > [[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. > [[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.
