Wolski wrote:
Hi! Have the following factors with the following levels. tmp$norm [1] rank rank rank rank rank log log log rank sqrt sqrt sqrt log log rank [16] rank rank sqrt sqrt sqrt sqrt log log log log sqrt none none none none [31] none none none none sqrt none Levels: log none rank sqrt
I would like to add an ordering to the levels. none<sqrt<log<rank
I tried with tmp$norm <-factor(tmp$norm,labels = c("none","sqrt","log","rank"),ordered=T)
tmp$norm
[1] log log log log log none none none log rank rank rank none none log [16] log log rank rank rank rank none none none none rank sqrt sqrt sqrt sqrt
[31] sqrt sqrt sqrt sqrt rank sqrt
Levels: none < sqrt < log < rank
But this is not what I would like to have because the command not only superimposes an ordering but also changes the factors!
Eryk
Eryk, See ?factor or ?ordered which will help. I think what you want is:
lev <- c("none", "sqrt", "log", "rank")
tmp$norm <- ordered(tmp$norm, levels = lev)or
tmp$norm <- factor(tmp$norm, levels = lev, ordered = TRUE)
Note the use of "levels" and not "labels".
--sundar
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