Hello
How can I remove the last 100 elements of a zoo series?
I know the name[-element] notation but I can't get it work to substract a full section
+2
A:
Just use the numeric indices, ie
n <- nrow(X)
X <- X[1:(N-100-1),]
where you should need to ensure N is larger 100 etc
Dirk Eddelbuettel
2010-09-20 17:08:15
With all your answers I've built almost what I needcoredata(zz2) <- c(rep(0,3),head(coredata(zz),-3))Now I just need to use it inside a zoo series with several columns, modifying just one.
2010-09-21 07:42:56
+5
A:
I like using head for this because it's easier to type. The other methods probably execute faster though... but I'm lazy and my computer is not. ;-)
x <- head(x,-100)
> head(1:102,-100)
[1] 1 2
Joshua Ulrich
2010-09-20 17:17:15
A:
Hi thanks What I really need is a little bit more complicated. I need to shift the series, removing some elements and adding other from the other side but when I do c(rep(0,10),x[1:(length(x)-11)]) it's not zoo any more.
cheers
This is an entirely different question. If what you _really_ needed was more complicated, why didn't you say so in your _original_ question? `?lag.zoo` answers this question.
Joshua Ulrich
2010-09-21 10:27:58