Re: [R] Extending time series

From: Achim Zeileis <Achim.Zeileis_at_wu-wien.ac.at>
Date: Wed 27 Apr 2005 - 02:10:50 EST

On Tue, 26 Apr 2005 11:52:00 -0400 Fernando Saldanha wrote:

> I noticed that when one tries to extend a time series (ts) object by a
> single period using window() actually two observations (NAs) are
> added. See below for an example. Does anyone know the reason for this
> behavior and how to avoid it?

Yes:
  end(x) + 1
is not what you expect it to be. You can set equivalently   end = 4
  end = c(4, 1)
to achieve what you want and you can compute one of those representations in various ways, e.g., tsp(x)[2] + 1. Z  

> Thanks.
>
> FS
>
> > x<-ts(c(1,2,3))
> > x1<- window(x, start(x), end(x) + 1, extend = TRUE)
> > x1
> Time Series:
> Start = 1
> End = 5
> Frequency = 1
> [1] 1 2 3 NA NA
>
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R-help@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 Received on Wed Apr 27 02:22:24 2005

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