R: removing the last elements of a vector

Question

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

Answer 1

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