On 9/09/2008, at 1:55 PM, Andrew Barr wrote:
Hi all,
I want to get the index numbers of all elements of a vector which
match any
of a long series of possible values. Say x <- c(1,2,3,4) and I
want to know
which values are equal to 1, 2 or 4. I could do
which(x == 1 | x==2 | x==4)
[1] 1 2 4
This gets really ugly though, when the list of values of interest
is really
long. Is there a nicer way to do this?
which(x%in%c(1,2,4))
cheers,
Rolf Turner
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