> (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.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
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