Re: More elegant usage of outer?

["Richard M. Heiberger" <rmh@temple.edu>]

It looks like you want the fac.design function.

names1 <- 1:3
names2 <- 4:7
names3 <- 9:12
names4 <- 0:2

my.names <- list(A=names1, B=names2, C=names3, D=names4)

result <- fac.design(levels=sapply(my.names, length),
                     factor.names=my.names)



If you really want to create the character strings you mentioned, you can do 
them
with paste on the result

apply(result, 1, paste, collapse=".")