[R] Remove vector elements from another vector

[Peter Dalgaard]

"Karsten Luder" <kalleswedens at hotmail.com> writes:

> Hello,
> 
> I have two vectors of different lengths. Fx a <- 1:9; b <- c(4, 5).
> What is the best way to remove the elements in vector b from vector a so 
> that the result would be a vector with elements c(1,2,3,6,7,8,9)?

I think we had this on the list no more than a week ago...

setdiff(a,b) 

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