Inner join with the data.table syntax
In the last exercise, you right joined population to capitals. The result contained all rows from population and had some NAs. In this exercise, you will perform an inner join instead, retaining rows only from both the tables.
Diese Übung ist Teil des Kurses
Joining Data with data.table in R
Anleitung zur Übung
Inner join population to capitals using the data.table syntax.
Interaktive Übung
Versuche dich an dieser Übung, indem du diesen Beispielcode vervollständigst.
# Inner join with the data.table syntax
___[population, ___, ___]