[R] Matching pairs of values
ehlers at ucalgary.ca
Sat Mar 27 15:11:53 CET 2010
On 2010-03-27 2:46, Berend Hasselman wrote:
> 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]
> [1,] 2 5
> [2,] 3 7
> [3,] 1 3
>  TRUE
>  FALSE
University of Calgary
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