[datatable-help] Transform characters to numbers and compare

[Sergio.pv]

I have a data.frame of two vectors.

df <- data.frame(G1=c("b","a","e","d","c"),
                 G2=c("c","d","e","b","a"))
You can see that both vectors have the same characters, but in diferent
order. I want to convert them into numbers and then compare them.

To compare G2 to G1, G1 must be the reference, so the output will be this:

df2 <- data.frame(G1=c("1","2","3","4","5"),
                 G2=c("5","4","3","1","2"))
Is there a way to do this?, thanks



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