[R] Remove vector elements from another vector

[Petr Pikal]

Hi

On 13 Sep 2005 at 14:35, Karsten Luder wrote:

> 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)?

> which(!a%in%b)
[1] 1 2 3 6 7 8 9
> a[which(!a%in%b)]
[1] 1 2 3 6 7 8 9
> a[(!a%in%b)]
[1] 1 2 3 6 7 8 9
>


HTH
Petr

> 
> Best regards,
> Kalle
> 
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Petr Pikal
petr.pikal at precheza.cz