Unnesting a data frame

You now have a tidied version of each model stored in the tidied column. You want to combine all of those into a large data frame, similar to how you combined the US and UK tidied models earlier. Recall that the unnest() function from tidyr achieves this.

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Anleitung zur Übung

Add an unnest() step to unnest the tidied models stored in the tidied column. Save the result as country_coefficients.
Print the resulting country_coefficients object to the console.

Interaktive Übung

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# Add one more step that unnests the tidied column
___ <- by_year_country %>%
  nest(-country) %>%
  mutate(model = map(data, ~ lm(percent_yes ~ year, data = .)),
         tidied = map(model, tidy))


# Print the resulting country_coefficients variable

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