[R] cube root

[Niels Richard Hansen]

?Syntax for precedence of operators.

On 16/04/11 22.51, Branimir K. Hackenberger wrote:
> This is some interesting:
>
>
>
>> -8^(1/3)
>
> [1] -2
>
>> x=(-8:8)
>
>> y=x^(1/3)
>
>> y
>
>   [1]      NaN      NaN      NaN      NaN      NaN      NaN      NaN      NaN
> 0.000000 1.000000
>
> [11] 1.259921 1.442250 1.587401 1.709976 1.817121 1.912931 2.000000
>
>
>
> So, can anybody explain this?! (Why is x[1]^(1/3)=y[1]=NaN, but
> -8^(1/3)=-2?)
>
>
>
> Thx!!!
>
>
>
>
>
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at 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.

-- 
Niels Richard Hansen                     Web:   www.math.ku.dk/~richard	
Associate Professor                      Email: Niels.R.Hansen at math.ku.dk
Department of Mathematical Sciences             nielsrichardhansen at gmail.com
University of Copenhagen                 Skype: nielsrichardhansen.dk	
Universitetsparken 5                     Phone: +1 510 502 8161	
2100 Copenhagen Ø
Denmark