[R] creating new vector

[Gabor Grothendieck]

Try this:

x <- 1:20
c(rowsum(x, gl(length(x), 5, length(x)))

If the length of x is not a mulitple of 5 there will be a stub at the
end containing the sum of less than 5 elements.

On 3/10/06, Amir Safari <amsa36060 at yahoo.com> wrote:
>
>
>    Hi R Users,
>  I don't know how much is difficult my problem and even it is possible to solve in R or not.
>  Given a vector with 2000 observations. I want to creat a new vector  from that vector so that new vector be the sum of every 5 observations  sequently. That is , each new observation is sum of every 5 sequent  observations, from the first observation of previous vector to the end.  So new vector must include 500 observations. My effort did not work in  R.
>  Do you have any way? Thanks a lot for any help.
>  Amir
>
>
>
>
> ---------------------------------
>
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
>