[R] order()

[Ko-Kang Kevin Wang]

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 descending".  How can I
do this?

Thanks,

Ko-Kang Wang

------------------------------------------------------------------------------
Ko-Kang Kevin Wang
Postgraduate PGDipSci Student
Department of Statistics
University of Auckland
New Zealand

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