Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.9.4 or earlier

Question

Let\'s say I have the following data.table in R:

  library(data.table)
  DT = data.table(x=rep(c(\"b\",\"a\",\"c\"),each=3), y=c(1,3,6)         


        

Answer 1

DT[order(-x)] works as expected. I have data.table version 1.9.4. Maybe this was fixed in a recent version.
Also, I suggest the setorder(DT, -x) syntax in keeping with the set* commands like setnames, setkey