[R] Pairwise combination
dwinsemius at comcast.net
Tue May 11 22:27:01 CEST 2010
On May 11, 2010, at 1:45 PM, chen jia wrote:
> Hi there,
> I am looking for a function that takes a vector as input and generates
> all pair wise combination of the elements of the input vector.
> For example, the input vector is c(1,2,3,4). The output vector is c(1
> and 2, 1 and 3, 1 and 4, 2 and 3, 2 and 4, 3 and 4).
That's not a vector.
> representation here is generic.
> I can use a for loop to do it, but it gets slow when the number of
> elements of the input vector is large.
David Winsemius, MD
West Hartford, CT
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