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Odd results with lag
2 messages · Worik R, Gabor Grothendieck
On Thu, Apr 7, 2011 at 6:11 PM, Worik R <worikr at gmail.com> wrote:
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!
lag lags the indexes not the data. Try lag(ts(S))
Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com