On 08/11/2012 4:42 PM, Cleber N.Borges wrote:
Ok, thanks.
There are a simple mode for emulate this behaviour?
This should sort by modulus then argument (phase):
x[order(Mod(x), Arg(x))]
It does strange things if x happens to be real:
> x <- (-5):5
> sort(x)
[1] -5 -4 -3 -2 -1 0 1 2 3 4 5
> x[order(Mod(x), Arg(x))]
[1] 0 1 -1 2 -2 3 -3 4 -4 5 -5
but that may be what you want.
Duncan Murdoch
Cleber
Em 08/11/2012 19:25, Thomas Lumley escreveu:
> On Fri, Nov 9, 2012 at 10:02 AM, Cleber N.Borges <kle...@yahoo.com.br
> <mailto:kle...@yahoo.com.br>> wrote:
>
> Hello useRs,
>
> The results of the SORT function differ from Scilab/Matlab for
> Complex Numbers in my example.
> This design is the desirable in R?
>
>
> Well, it's deliberate and documented.
>
> R sorts complex numbers by real part then by imaginary part. Matlab,
> according to its documentation, sorts by modulus then phase.
>
> There isn't a unique way to sort complex numbers, so you're going to
> get differences. Personally, I think the R method is more
> straightforward, since you don't need to decide and remember where the
> branch cut goes on the phase coordinate.
>
> -thomas
>
> --
> Thomas Lumley
> Professor of Biostatistics
> University of Auckland
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
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.
______________________________________________
R-help@r-project.org mailing list
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.
