-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Alexander Sokol
Sent: Thursday, November 11, 2004 8:34 AM
To: r-help at stat.math.ethz.ch
Subject: [R] Logical "and"
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.
Obviously, this is possible by writing
a[a!=b[1] & a!=b[2] & a!=b[3]]
But I would like a solution which is applicable to the situation
where the
number of elements in b is unknown.
I have looked in the R manuals, the FAQ and the mailing lists,
but have been
unable to find a solution.
Thank you for your replies,
Alexander