Perhaps rev() can help?
Maybe something like:
x <- c("a", "b", "c")
c(x[1], rev(x[2:3]))
João
On Tue, 2014-04-15 at 17:52 +0000, Hofmeister, Philip wrote:
> this is probably more appropriate for a general R listserv, but i'm more
> likely to get an answer i can decipher here. apologies also for what is
> likely a simple fix, but i can't seem to find the right term or syntax to get
> this to work without writing ugly code.
>
> i want to swap values in a vector, e.g.
>
> x <- c(1, 2, 3)
> [1] 1 2 3
>
> and get back
>
> 1 3 2
>
> i can do this by saving the 2nd or 3rd element of the vector elsewhere,
> replacing one of the vector elements (x[3] <- x[2]), and then restoring the
> stored value, but that seems wasteful. surely there is a function like swap()
> or std::swap(a, b), but i can't seem to find anything. anyone have any
> ideas?
>
> ph
>
>
>
