>> Currently, for numeric a you can do either >> order(-a) >> or >> order(a, decreasing=FALSE) >> For nonnumeric types like POSIXct and factors only >> the latter works. >> >> Under my proposal your >> order(a, -b, c, d) >> would be >> order(a, b, c, d, decreasing=c(FALSE,TRUE,FALSE,TRUE)) >> and it would work for any ordably class without modifications >> to any classes. > > Why not use > > order(a, -xtfrm(b), c, -xtfrm(d))
That's a good suggestion. You could make it even easier to read with desc <- function(x) -xtfrm(x) order(a, desc(b), c, desc(d)) Could you remind me what xtfrm stands for? Thanks! Hadley -- http://had.co.nz/ ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
