On Aug 31, 2010, at 9:16 AM, Maas James Dr (MED) wrote:
If possible I would like to combine two different character arrays
in combinations
Array1 <- c("height","weight","age","sex")
Array2 <- c("trt0","trt1","trt2")
I would like to combine these two character vectors to end up with
such ...
Array3
"height.trt0.trt1"
"height.trt0.trt2"
"weight.trt0.trt1"
"weight.trt0.trt2"
"age.trt0.trt1"
"age.trt0.trt2"
"sex.trt0.trt1"
"sex.trt0.trt2"
?expand.grid # and noting that "trt0" is handled differently than
Array2[2:3]
> paste(expand.grid(Array1, Array2[2:3])[,1], Array2[1],
expand.grid(Array1, Array2[2:3])[,2], sep=".")
[1] "height.trt0.trt1" "weight.trt0.trt1" "age.trt0.trt1"
"sex.trt0.trt1" "height.trt0.trt2"
[6] "weight.trt0.trt2" "age.trt0.trt2" "sex.trt0.trt2"
--
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.
