Anti-joins
Anti-joins are useful when you want to filter rows in one table not found in the other.
Your goal is to filter the population so that it does not contain the state capitals, and filter the area so that it only contains administrative areas, not the major Australian states.
Diese Übung ist Teil des Kurses
Joining Data with data.table in R
Interaktive Übung
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# Anti-join capitals to population
population[___]