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Do variables exist?

If R cannot find a variable in the current environment, it will look in the parent environment, then the grandparent environment, and so on until it finds it.

rsa_env has been modified so it includes capitals and national_parks, but not population.

Diese Übung ist Teil des Kurses

Introduction to Writing Functions in R

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Anleitung zur Übung

  • Check if population exists in rsa_env, using default inheritance rules.
  • Check if population exists in rsa_env, ignoring inheritance.

Interaktive Übung

Vervollständige den Beispielcode, um diese Übung erfolgreich abzuschließen.

# Compare the contents of the global environment and rsa_env
ls.str(globalenv())
ls.str(rsa_env)

# Does population exist in rsa_env?
___("___", envir = ___)

# Does population exist in rsa_env, ignoring inheritance?
___
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