[R] apply calculations to elements in a vector

[Rui Barradas]

Hello,

Try the following.

x <- 1:3*10
idx <- seq_along(x)[-1]
rowSums(cbind(x[idx], x[idx-1]))

Hope this helps,

Rui Barradas
Em 16-11-2012 14:50, e-letter escreveu:
> 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.?
>
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