[R] Matching pairs of values
bhh at xs4all.nl
Sat Mar 27 09:46:53 CET 2010
David Scott-6 wrote:
> I am sure someone can come up with a clever way of doing what I want---I
> don't seem to be able to.
> I want to check if a pair of numbers occurs as one of the rows of an n
> by 2 matrix. If I was only checking whether a single number was in a
> vector of numbers I would use %in% but I can't see how to generalize to
> this case.
Would this help?
vtest <- function(x, lookfor) any(apply(x,1, function(v)
> ma <- matrix(c(2,3,1,5,7,3),ncol=2)
[1,] 2 5
[2,] 3 7
[3,] 1 3
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