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lexicopgraphic
2002 Mar 29
2
order()
Hi,
In the order() help file, there is an example like:
a <- c(4, 3, 2, NA, 1)
b <- c(4, NA, 2, 7, 1)
z <- cbind(a, b)
(o <- order(a, b)); z[o, ]
How can I do something like "order a in ascending order, b in descending
order"? And say I have a third vector c, and I'd like to add this to the
previous condition "a ascending, b descending, c