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An index of all possible combinations of variables in a datafram e

Adaikalavan Ramasamy 
Alternatively you can use the combinations() function in gregmisc.

library(gregmisc)
n <- 3
sapply(1:n, function(x) apply(combinations(n, x, LETTERS[1:n]), 1, 
paste, collapse="") )

Here is the same code written with a for loop
n <- 3
out <- NULL
for(i in 1:n){
  tmp <- combinations(n, i, LETTERS[1:n])
  out <- c(out, apply(tmp, 1, paste, collapse=""))
}
out
[1] "A"   "B"   "C"   "AB"  "AC"  "BC"  "ABC"
On Tue, 2004-09-28 at 08:38, Dimitris Rizopoulos wrote:

Thread (5 messages)

Alan Simpson An index of all possible combinations of variables in a data fram e Sep 27 Gabor Grothendieck An index of all possible combinations of variables in a data fram e Sep 27 Dimitris Rizopoulos An index of all possible combinations of variables in a datafram e Sep 28 Adaikalavan Ramasamy An index of all possible combinations of variables in a datafram e Sep 28 Chris Jackson An index of all possible combinations of variables in a data fram e Sep 28