[R] apply calculations to elements in a vector

[D. Rizopoulos]

Try this:

x <- c(10, 20, 30)
head(x, -1) + tail(x, -1)



I hope it helps.

Best,
Dimitris


On 11/16/2012 3:50 PM, e-letter wrote:
> Readers,
>
> If a vector consists of:
>
> 10
> 20
> 30
>
> how to create a new vector based upon the results of calculations to
> the elements, e.g. addition of successive elements, so that a new
> vector would be:
>
> 30
> 50
>
> i.e. 10+20, then 20+30, etc.?
>
> ______________________________________________
> 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.
>

-- 
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center

Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014
Web: http://www.erasmusmc.nl/biostatistiek/