unique / sort in data.frame

Question

I have a data frame like this:

x=c(\"01\",\"01\",\"01\",\"22\",\"22\",\"03\",\"03\",\"03\",\"35\",\"35\")
y=c(\"f\",\"f\",\"f\",\"m\",\"m\",\"m\",\"m\",\"m\"         


        

Answer 1

df <- df[order(df$spn), ]
> df[!duplicated(df), ]
  spn sex
1  01   f
6  03   m
4  22   m
9  35   f