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rescity
2012 Mar 20
2
Unique in DataFrame
Hello,
I have little doubt, and I do not think that the way I solve the problem
is the best way to do it.
The following is a small dataset
x<-data.frame(city="Barcelona",sales=253639)
x<-rbind(x,data.frame(city="Madrid",sales=223455))
x<-rbind(x,data.frame(city="Lisbon",sales=273633))
x<-rbind(x,data.frame(city="Madrid",sales=266535))