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.
?combn
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.
The 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. Best, Jia
David Winsemius, MD West Hartford, CT ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
