Message-ID: <x2mzxoijow.fsf@biostat.ku.dk>
Date: 2004-11-11T13:44:47Z
From: Peter Dalgaard
Subject: Logical "and"
In-Reply-To: <41B2867D@webmail2.ofir.dk>
Alexander Sokol <alexandersokol at ofir.dk> writes:
> Hello,
>
> I have the following very simple problem:
>
> Say I have two vectors,
>
> a<-c(1,7,4,5,9,11)
> b<-c(7,4,9)
>
> I would like to create a vector containing the elements in a which are not in
> b.
As in
> setdiff(a,b)
[1] 1 5 11
or
> a[!(a %in% b)]
[1] 1 5 11
?
(Note that they differ if a has nonunique values).
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907