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.
