[R] sorting ascending descending! & THX@coling
Peter Dalgaard BSA
p.dalgaard at biostat.ku.dk
Fri Jan 12 21:02:59 CET 2001
Thomas Vogels <tov at ece.cmu.edu> writes:
> Witold Eryk Wolski <wolski at molgen.mpg.de> writes:
> > THX.
> > You are right!!
> > a[order(-1*a)]
> >  110 23 4 3 2
> > Eryk
> hmm, I would have thought rev(order(...)) to be more intuitive:
> x[order(x)] sorts in ascending order,
> x[rev(order(x))] sorts in descending order...
It is, but the sign trick generalizes to multiple sort criteria:
(assuming that d$ch is a character vector which you want to sort by in
reverse alphabetical order).
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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