Given a vector:
> S <- c(1,1,0,0,1,1,-1,-1,-1,0,1)
Then I expected lag(S) to give...
c(1,0,0,1,1,-1,-1,-1,0,1)
but instead...
> S
[1] 1 1 0 0 1 1 -1 -1 -1 0 1
> lag(S)
[1] 1 1 0 0 1 1 -1 -1 -1 0 1
attr(,"tsp")
[1] 0 10 1
>
This is very odd. What is happening?
I get what I using S[-1] so I have no problem, but I obviously do not
understand some thing!
Worik
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