Dear list,
I have a vector of elements which I want to combined each with each, but
none with itself. For example,
> v <- c("a", "b", "c")
and I need a function 'combine' such that
> combine(v)
[[1]]
[1] "a" "b"
[[2]]
[1] "a" "b"
[[3]]
[1] "b" "c"
I am not very interested in the orders of the output items for now, and the
form can be something differs from list, like matrix or data frame. I know
of 'expand.grid', but it will combine each item with each item including
itself, so not what I wants.
Could you help me please. Thank you.
Mvh.,
Marie
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