Direct assignment should do it:
x[c(2,3)] <- x[c(3,2)]
--MC
--
Martin Corley
On 15 April 2014 18:55:57 "Hofmeister, Philip" <[email protected]> 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
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
