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Getting keys

You can also get and set the keys programmatically. In this exercise, only one of netflix and imdb has their key set. Your job is to find out which data.table has had their key set, then use that to set the key for the other data.table.

Diese Übung ist Teil des Kurses

Joining Data with data.table in R

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Anleitung zur Übung

  • Check whether netflix and imdb have had any key set.
  • Assign the key of the data.table which has a key to the_key.
  • Set the key of the other data.table using the_key.

Interaktive Übung

Versuche dich an dieser Übung, indem du diesen Beispielcode vervollständigst.

# Check for keys
___
___

# Find the key
the_key <- ___

# Set the key for the other data.table
___(___, ___)
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