On Nov 17, 2016 11:55 AM, "Thierry Onkelinx" <thierry.onkelinx at 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 tosay> 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 ofdata.> ~ John Tukey > > 2016-11-17 20:19 GMT+01:00 Da Zheng <zhengda1936 at gmail.com>: > > > Hello, > > > > I just realized that 1^NA outputs 1 while 1.1^NA outputs NA in R v3.3.1and> > 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 at 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 at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html> and provide commented, minimal, self-contained, reproducible code.[[alternative HTML version deleted]]
I tried on my computer.> (1+ 0i)^ NA[1] NaN+NaNi On Thu, Nov 17, 2016 at 3:42 PM, Bert Gunter <bgunter.4567 at gmail.com> wrote:> On Nov 17, 2016 11:55 AM, "Thierry Onkelinx" <thierry.onkelinx at 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 <zhengda1936 at 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 at 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 at 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]]
> (1+ 0i)^ NA[1] NA > sessionInfo() R version 3.3.1 (2016-06-21) Platform: x86_64-apple-darwin13.4.0 (64-bit) Running under: OS X 10.11.6 (El Capitan) locale: [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8 attached base packages: [1] stats graphics grDevices utils [5] datasets methods base other attached packages: [1] lubridate_1.6.0 loaded via a namespace (and not attached): [1] magrittr_1.5 rsconnect_0.5 tools_3.3.1 [4] stringi_1.1.2 stringr_1.1.0 > On 11/17/2016 2:47 PM, Da Zheng wrote:> I tried on my computer. >> (1+ 0i)^ NA > [1] NaN+NaNi > > > On Thu, Nov 17, 2016 at 3:42 PM, Bert Gunter <bgunter.4567 at gmail.com> wrote: > >> On Nov 17, 2016 11:55 AM, "Thierry Onkelinx" <thierry.onkelinx at 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 <zhengda1936 at 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 at 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 at 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 at 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.