[R] extract vector elements of unknown range

[R. Michael Weylandt <michael.weylandt@gmail.com>]

On Aug 25, 2012, at 4:23 AM, Sepp Tannhuber <sepp.tannhuber at yahoo.de> wrote:

> Hi,
> 
> thanks for your quick answers! These solve my problem.
> 
> Now I have another question. I think I can use 
>   head(y, -1)
> instead of
>   y[-length(y)]
> 
> Are there differences in terms of performance?

The latter is marginally more efficient. Take a look at head.matrix()

Cheers,
Michael


> 
> Best regards
> Joseph
> 
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