orderBy with changes in decreasing and increasing sorting

Question

Is there a standard way of sorting a data.frame by several columns, but with changes in decrease or increase? For example, you may want to order a data.frame by one variable (decreasing) and by the next (increasing).

Is there something like:

mydf[ order(mydf$myvariable,mydf$myvariable2,decreasing=c(FALSE,TRUE)), ]

Answer 1

Quick workaround:

 mydf[ order(mydf$myvariable,-mydf$myvariable2,decreasing=F), ]

For factors, strings etc:

 mydf[ order(mydf$myvariable,-xtfrm(mydf$myvariable2),decreasing=F), ]

Answer 2

library(plyr)
mydf[with(mydf, order(myvariable, desc(myvariable2)), ]

# Or, a little less typing:
arrange(mydf, myvariable, desc(myvariable2))

Answer 3

library(Deducer)
sort(mtcars,by = ~ cyl - mpg)