3 messages · Fernando Saldanha, Achim Zeileis, Gabor Grothendieck
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? 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
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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