Dear Da, NA represents an unknown value x. 1 ^ x = 1 for all possible values of x. Hence 1 ^ NA = 1.
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.
