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Choosing among the four verbs

In this chapter you've learned about the four verbs: select(), mutate(), relocate(), and rename(). Here, you'll choose the appropriate verb for each situation. You won't need to change anything inside the parentheses.

Latihan ini adalah bagian dari kursus

Data Manipulation with dplyr

Lihat Kursus

Petunjuk latihan

  • Choose the right verb for changing the name of the unemployment column to unemployment_rate
  • Choose the right verb for keeping only the columns state, county, and the ones containing poverty.
  • Calculate a new column called fraction_women with the fraction of the population made up of women, without dropping any columns.
  • Keep only three columns: the state, county, and employed / population, which you'll call employment_rate.

Latihan interaktif praktis

Cobalah latihan ini dengan menyelesaikan kode contoh berikut.

# Change the name of the unemployment column
counties %>%
  ___(unemployment_rate = unemployment)

# Keep the state and county columns, and the columns containing poverty
counties %>%
  ___(state, county, contains("poverty"))

# Calculate the fraction_women column without dropping the other columns
counties %>%
  ___(fraction_women = women / population)

# Move the region column to before state
counties %>%
  ___(region, .before = state)
Edit dan Jalankan Kode