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

df2 = df[!duplicated(df), ] # Remove duplicated rows.
df3 = df2[order(df2$spn), ] # Sort by the spn column.

df3
#  spn sex
#1  01   f
#6  03   m
#4  22   m
#9  35   f